Bio-inspired designs: leveraging biological brilliance in mechanical engineering—an overview

Abstract

Nature’s evolutionary mastery has perfected design over the years, yielding organisms superbly adapted to their surroundings. This research delves into the promising domain of bio-inspired designs, poised to revolutionize mechanical engineering. Leveraging insights drawn from prior conversations, we categorize innovations influenced by life on land, in water, and through the air, emphasizing their pivotal contributions to mechanical properties. Our comprehensive review reveals a wealth of bio-inspired designs that have already made substantial inroads in mechanical engineering. From avian-inspired lightweight yet robust materials to hydrodynamically optimized forms borrowed from marine creatures, these innovations hold immense potential for enhancing mechanical systems. In conclusion, this study underscores the transformative potential of bio-inspired designs, offering improved mechanical characteristics and the promise of sustainability and efficiency across a broad spectrum of applications. This research envisions a future where bio-inspired designs shape the mechanical landscape, fostering a more harmonious coexistence between human technology and the natural world.

Introduction

In the relentless pursuit of innovation within the realms of engineering, the concept of biomimicry has emerged as a beacon of inspiration, guiding the development of technologies that are both sophisticated and sustainable (Lebdioui et al. 2022). This approach, deeply rooted in observing and emulating nature’s time-tested patterns and strategies, has been honed through millions of years of evolutionary trial and error. The essence of biomimicry lies in its ability to offer revolutionary insights into the design of materials, structures, and systems by mimicking the intricate mechanisms and processes found in the natural world. Through the meticulous study of natural occurrences and their environments, engineers and designers have unlocked a treasure trove of bio-inspired innovations, leading to advancements that echo the efficiency, resilience, and adaptability of nature itself (Benyus et al. 2002).

The significance of biomimicry extends beyond mere replication of natural forms, delving into the core principles that govern biological entities. By understanding how natural systems minimize energy consumption, maximize strength, and optimize functionality, engineers can create designs that are not only effective but also inherently sustainable (Pauw et al. 2014). This paradigm shift towards bio-inspired engineering is fueled by the recognition of nature’s unparalleled expertise in solving complex problems through elegant, efficient solutions. Integrating biomimetic principles has led to the development of materials with unparalleled mechanical properties, such as lightweight yet durable structures inspired by the skeletal frameworks of marine organisms and aerodynamic designs derived from the streamlined shapes of birds and fish (Flores et al. 2018).

Moreover, the application of biomimicry in mechanical engineering is not confined to the development of new materials; it also encompasses the innovative redesign of mechanical systems and processes, drawing inspiration from the fluid dynamics principles observed in aquatic life and the energy-efficient locomotion of terrestrial animals (Yen et al. 2007). The exploration of bio-inspired designs has unveiled a bundle of opportunities for enhancing performance, reducing energy consumption, and minimizing environmental impact across a wide array of engineering disciplines (Jiang et al. 2023).

This paper aims to illuminate the transformative potential of biomimicry in mechanical engineering, providing a comprehensive overview of bio-inspired innovations that have been seamlessly integrated into mechanical systems. By categorizing these advancements based on their terrestrial, aquatic, and aerial inspirations, the paper endeavors to showcase the diverse applications of biomimicry and its critical role in driving forward the frontiers of mechanical engineering. In doing so, it underscores the promise of a future where engineering solutions are not only inspired by but also in harmony with, the natural world, fostering a symbiotic relationship between human technology and the environment.

Organization of the manuscript

Organization of the manuscript as shown in Table 1.

Table 1.

Organization of the manuscript

Section	Description
Sec A: Introduction	A brief introduction of bio-inspired design Broad Overview Organisation of Paper Graphical Abstract
Sec B: Literature Overview	Nature-Inspired Mechanical Breakthroughs: A Century of Biomimicry Evolution Two Decades of Nature-Inspired Design: A brief Bibliometric Analysis of the Scopus Database (2003–2023) The Evolution of Nature-Inspired Materials and the Prospective Future of Bionic Materials: Biomimicry in Mechanical Engineering: An Evolutionary Chronicle Two Decades of Nature-Inspired Design: A brief Bibliometric Analysis of the Scopus Database
Sec C: Life on Land	Gecko-inspired Adhesives Leaf-Inspired Air Filtration Termite-Inspired Building Design Woodpecker-inspired Shock Absorption Spider Silk-inspired Materials
Sec D: Life under Water	Shark Skin-Inspired Hydrodynamic Designs Mussel-inspired underwater adhesives Octopus-inspired soft robotics Seashell-inspired Impact-Resistant Materials Fish School-inspired Coordination Algorithms
Sec E: Life in Air	Bird-inspired Aerodynamic Designs Butterfly Wing-inspired Colour Creation Bat Echolocation-inspired Sensors Dragonfly Wing-inspired Microbial Resistance Bee Hive-inspired Thermal Regulation
Sec F: Overcoming Limitations and Future Directions	Current Limitations in Bio-Inspired Design Current Trends and Possible Solutions Future Directions
Sec G: Conclusions
Sec H: References

Graphical abstract

The graphical abstract as shown in Fig. 1.

Fig. 1.

An overview of life's diversity: exploring existence on land, in air, and under water, accompanied by technological and natural tepresentations

Literature overview

Nature’s vast tableau provides a diverse palette of designs, honed through eons of evolutionary trial and error (Baunach et al. 2021; Komatsu et al. 2022). The meticulous spiral arrangement of pinecones, for instance, follows the Fibonacci sequence, optimizing space and ensuring maximum seed protection (Paul et al. 2016; Liu et al. 2018). Then there is the mantis shrimp, whose dactyl clubs can accelerate at over 10,000 g and strike targets with a speed of 23 m/s, inspiring impact-resistant materials (Sahay et al. 2020). These phenomena, amongst a myriad of others, beckon researchers to the exciting domain of bio-inspired innovations.

The realm of bio-inspiration delves deep into nature’s catalogue, seeking to understand and emulate. Consider the spider’s web: its silk exhibits a tensile strength of about 1.3 GPa, comparable to that of alloyed steel, yet it remains remarkably lightweight (White et al. 2018; Zhang et al. 2023). Or the desert beetle has evolved to condense fog from the air, hinting at potential water-harvesting technologies in arid regions (Zhou et al. 2020).

The applications birthed from such bio-inspirations span a gamut of fields. In healthcare, the unique undulating motion of the cilia in our respiratory tracts, moving at velocities of around 10–20 μm per sec, is being studied for advanced fluid transport systems (Maqbool et al. 2017). In the realm of sustainable energy, the helical arrangement of sunflower seeds, following the golden angle of approximately 137.5°, influences the layout of solar panels for optimal sunlight capture.

This review journeys through the wonders of bio-inspired designs. From the self-healing capabilities of tree bark, which can recover from external pressures of up to 5 MPa, to the vibrant wings of the Morpho butterfly, reflecting light at wavelengths between 400 and 480 nm due to nanostructures, we dive deep into the intricacies of nature’s engineering marvels (Dong et al. 2020; Kittle et al. 2017). Alongside the potential of these designs, we also touch upon the challenges and intricacies of transmuting them into human-centric applications. Embracing bio-inspired paradigms is more than a mere academic endeavor. It represents a shift towards solutions that are efficient and resonate with the rhythms of the natural world. In an era marked by a clarion call for sustainability, these nature-influenced approaches might very well chart our path forward (Tan et al. 2019).

Bio-inspired designs represent a confluence of nature’s timeless wisdom and human ingenuity (Fattepur et al. 2023). As we embark on this intriguing path, we are not just innovating; we are harmonizing with an evolutionary symphony, crafting a future that is in tune with nature’s grand design.

Nature-inspired mechanical Breakthroughs: a century of biomimicry evolution

In the vast expanse of the natural world, millions of species have evolved, adapted, and optimized their physical structures, behaviors, and strategies over eons to survive and thrive in their respective niches. These biological marvels, honed by the rigorous testing ground of nature, offer a treasure trove of ingenious solutions to complex problems. Biomimicry, the practice of emulating these natural solutions in human-made designs, is not a new idea (Bae et al. 2019). However, its integration into the field of mechanical engineering is a dynamic and continually evolving saga. This evolutionary event seeks to delve into the heart of this convergence, tracing its roots, examining its progress, and envisioning its future (Fogarty et al. 2013).

From the earliest instances of humans fashioning tools inspired by animal and plant forms to the modern marvels of cutting-edge robotics that mirror the fluid movements of creatures, biomimicry in mechanical engineering has been a testament to humanity’s admiration for and understanding of nature. This journey is not just about the mimicking of form but extends to the emulation of function, materials, processes, and systems found in the natural world (Kondoyanni et al. 2022).

This section navigates through the historical milestones where nature’s designs influenced mechanical innovations. Figure 2 depicts the tracing nature’s blueprint: a century of biomimetic innovations in engineering and Design. Case studies that underscore the brilliance of turning to nature for engineering solutions are explored. In addition, the challenges and ethical considerations that arise when blurring the lines between the biological and the mechanical domains were probed. Through this exploration, it becomes evident that as we stand on the brink of a new era of technological advancements, the lessons learned from nature will be more invaluable than ever before.

Fig. 2.

Tracing nature’s blueprint: a century of biomimetic innovations in engineering and Design

As we traverse the annals of mechanical engineering, one cannot help but observe the indelible imprints of nature on human innovation. The vast tapestry of our natural world, refined over millennia, offers a reservoir of solutions that have, over the past century, been harnessed, understood, and integrated into the very core of our technological advancements (Gresham et al. 2022).

In the early 1910s, a seemingly innocuous hike would lead to a groundbreaking invention. George de Mestral’s keen observation of burrs clinging to his dog’s fur, due to their microscopic hooks (Bonzon et al. 2014; Ponomarenko et al. 2017), translated into the creation of Velcro. By mirroring nature’s design, de Mestral devised a nylon fabric system, achieving a binding force of up to 8 N/cm².

This invention swiftly permeated diverse sectors, from aerospace to medical applications, exemplifying nature’s prowess in creating efficient, reusable fastening mechanisms. Fast forward to the 1920s, and we find the challenges of aerodynamics being addressed with Avian’s inspiration.

The Shinkansen bullet train (Hu et al. 2018), plagued with sonic booms, found an unlikely solution in the kingfisher (Zhen et al. 2017). Its beak, streamlined for efficient water entry, became the blueprint for the train’s nose redesign. By emulating this natural shape, engineers achieved a 15% reduction in aerodynamic noise (How kingfisher inspired bullet trains?, 2022) and enhanced the train’s energy efficiency by 10%, setting a precedent for marrying biology with mechanics.

The 1930s marked an era where architects sought inspiration from the natural world to address building ventilation challenges. Termite mounds, with their consistent internal microclimate, achieved this through a maze of tunnels and vents that drove air currents and facilitated heat exchange (Schaufelberger et al. 2023; Jamali et al. 2013). By incorporating these principles, buildings began to see a reduction in energy consumption of up to 10%, paving the way for sustainable architectural design (Ventilation techniques in the 19th century: Learning from the past 2011).

The dark waters of the 1940s unveiled the marvel of echolocation, a technique employed by dolphins and bats. These creatures emit sound waves, analyzing the returning echoes to discern obstacles and prey, even in murky waters (Zsebok et al., 2013). This biological phenomenon served as the foundation for sonar technology, transforming underwater detection and navigation (Simon 2019).

As the world marvelled at Paris’s iconic Eiffel Tower in the 1950s, few were aware of its avian-inspired design. Birds, despite the lightweight nature of their bones, can withstand rigorous flight dynamics (Perez et al. 2014). This balance between weight and strength, especially evident in the bird’s femur with a tensile strength of up to 170 MPa (Li et al. 2020), inspired Gustave Eiffel. His tower, with its iron lattice design, became a testament to the fusion of nature’s elegance with human engineering.

The competitive world of the 1960s saw athletes donning swimsuits that bore the legacy of the swift-moving shark (Arunvinthan et al. 2021). The unique denticles of sharkskin reduce water turbulence, a feature swimsuit designers emulated using fabrics with ridge patterns, achieving up to a 10% reduction in hydrodynamic drag (Marinho et al. 2012).

The 1970s witnessed materials science turning to nature for insights. Emulating the composite, hierarchical structure of bones and shells, which can withstand compressive strengths of up to 210 MPa (George et al. 2019), researchers developed carbon fiber composites. These materials, lightweight yet robust, revolutionized industries, reflecting nature’s genius in crafting materials that balance resilience with function (Aprilia et al. 2015).

As the 1980s dawned, the realm of robotics turned its gaze to the insect kingdom. The cooperative behaviors of ants and bees, adept at navigating complex terrains, inspired robotic designs (Kiakojouri et al. 2023). These robots, capable of sensing and adapting to their surroundings, showcased the potential of integrating biologic principles into mechanic constructs.

The 1990s saw marine life offering insights into propulsion mechanisms. Researchers, inspired by the diverse propulsion strategies of aquatic creatures, developed biomimetic fins that enhanced the agility of underwater vehicles, leading to improvements in energy efficiency by up to 15% (Kolmogorov et al. 2021).

The turn of the millennium in the 2000s brought attention to the lotus leaf and its superhydrophobic properties. By emulating the leaf’s micro and nano-structures, which can repel water droplets with contact angles exceeding 150°, innovations in self-cleaning surfaces emerged, revolutionizing maintenance paradigms (Bastos et al. 2016).

The 2010s saw the wonders of the gecko take center stage. Their feet, with millions of tiny hairs, adhere to surfaces using van der Waals forces (Miyazaki et al. 2019), a weak intermolecular force. Harnessing this principle led to the development of advanced adhesives that could achieve binding forces of up to 10 N/cm^2 without leaving residues (Liu et al. 2023).

Recently, as we ventured into the 2020s, avian aerodynamics began (Tanaka et al. 2022) informing drone designs. Birds, with their intricate flight patterns and wing structures that can adjust to varying wind speeds, inspired drones with enhanced agility and energy efficiency, promising a transformative impact on aerial transportation (Noda et al. 2022).

As we reflect on this journey, it is evident that the interplay between nature’s designs and human innovation is not just a testament to our ingenuity but also a homage to the myriad wonders of the natural world (Towards a unified understanding of human–nature interactions 2022). As we continue to delve deeper into the secret’s nature holds, one can only imagine the myriad of innovations that await us in the future.

Two decades of nature-inspired design: a brief bibliometric analysis of the Scopus Database (2003–2023)

Nature-inspired design has gained significant attention in the past two decades due to its potential for providing sustainable solutions and addressing various technologic and environmental challenges. This section aims to provide a brief bibliometric analysis of the Scopus database from 2003 to 2023, focusing on the research papers related to nature-inspired design. The research methods employed for this analysis involved bibliometrics, which allowed for a quantitative evaluation of the articles selected from the Scopus database based on their citations, keywords, and other relevant data. This analysis was conducted using the Scopus database due to its extensive coverage and reliability, making it a widely used resource among academicians.

Year-wise top keywords in the nature -inspired design

The bibliometric analysis of the Scopus database from 2009 to 2024 reveals a steadily growing interest in bioinspired research, as reflected by the increasing number of publications each year, as shown in Fig. 3. Notably, the term “bioinspired” consistently ranks high in the keyword list every year, emphasizing the popularity and relevance of this research domain. Furthermore, there is a clear evolution in the sub-domains of bioinspired research. While earlier years (2009–2010) highlighted specific areas like “controlled wet adhesion” and “electroosmotic pump, (Abbas et al. 2022) “the subsequent years saw an expansion into broader applications like “soft robotics (Blandin et al. 2018) “self-assembly,” and “3D printing.” By 2024, there is a diversification into specific topics like “self-healing,

Fig. 3.

Most used keywords in the Nature-Inspired Design research papers over the past 2 decades

“cellulose,” and “damage detection.” The data also underscore the rise of “bioinspired design” and “bioinspired materials” as central themes, resonating with the increasing focus on practical applications of bioinspired principles in design and material science. Overall, the analysis provides a comprehensive view of the evolving landscape of bioinspired research over a span of 16 years.

Research trends in mature-inspired subdomains (last 10 years):

“The past decade has witnessed a remarkable convergence of engineering and nature (Kiakojouri et al. 2023), as elucidated by our radar charts that underscore the multidimensional exploration within the realm of bio-inspired research. Figure 4 illustrates the decade-long overview highlighting the ebb and flow of interest across various nature-inspired subdomains, showcasing the dynamism and evolution of scientific focus. An unmistakable trajectory observed is the burgeoning interest in bio-robotics and algorithms (Gul 2020), propelled by nature’s unparalleled proficiency in adaptive problem-solving. This trend echoes a broader academic pivot towards deciphering and emulating organic solutions that have been refined over millions of years”.

“Furthermore, the ascent in investigations into bio-mimetic materials and architecture heralds a transition towards practices that are both ecologically considerate and functionally superior (Gawel et al. 2019). Delving into niches like biomimetic optics and the intricate dance of fluid dynamics, an emergent narrative crystallizes: the relentless pursuit of unlocking nature’s age-old enigmas to inform and transform contemporary applications. Such advancements are already catalyzing paradigm shifts across diverse sectors, ranging from medical interventions to aerospace design (Budholiya et al. 2021), by championing a marriage of sustainability with performance. Projecting forward, the sustained vigor in this arena of research paints a future canvas where technologic innovations are harmoniously intertwined with the intricate tapestries of nature, culminating in a symphony of progress and symbiosis.”

Fig. 4.

Decade-long overview highlighting the ebb and flow of interest across various nature-inspired subdomains, showcasing the dynamism and evolution of scientific focus

Publication tends for various subdomains (last 10 years):

The graph elucidates the publication trends across different bio-inspired research areas from 2014 to 2022. The most salient observation is the pronounced increase in publications related to “Bio-inspired Robotics,” which peaks around 2020 before experiencing a slight decline in 2022. Further, a detailed understanding is obtained from Fig. 5. This suggests a heightened interest in robotic applications inspired by biologic systems during this period (Stella et al. 2023). “Biomimetic Materials (Varshabi et al. 2022)” and “Nature-Inspired Architecture” have both shown a steady incline over the years, indicating their growing significance in the research community. On the other hand, the ‘Bio-inspired Algorithms’ (Gul et al. 2021) domain witnessed a surge in publications in 2018, but it has since shown a declining trend. ‘Biomimetic Medical Applications’ demonstrated fluctuating interest with a peak in 2020, while ‘Nature-Inspired Nanotechnology’ has seen a gradual upswing since 2018. ‘Biomimetic Optics and Photonics’ (Galloway et al. 2013) remains relatively consistent in its publication numbers throughout the years. Overall, the data reveal the evolving nature of bio-inspired research, with certain domains gaining prominence in specific periods.

Fig. 5.

Publication trends in various bio-inspired subdomains over the past 10 years, highlighting the dynamic nature of research interests

Global hotspots of nature-inspired research

From Fig. 6, highlights a world map depicting the distribution and concentration of nature-inspired research publications across different countries, visualized on a logarithmic scale The map displays the geographic distribution of nature-inspired research publications around the world. Countries with a deeper shade of blue represent a higher number of publications in this domain. Notably, North America, particularly the United States, alongside some countries in Western Europe and East Asia, exhibit a pronounced concentration of research output. These regions, historicaly known for their robust academic and industrial research infrastructures, seem to be leading in nature-inspired research as well. South America, Africa, and a considerable portion of Asia have lighter shades, indicating lesser contributions in this research domain relative to the global leaders. Australia, while being vast in terms of land area, shows a moderate level of contribution. India stands out as an exception, with a notable presence in nature-inspired research, evidenced by its darker shade on the map.

“This trend is evident, for example, in issued US patents that contain keywords such as “biomimetic” or “bioinspired” (Mahajan et al. 2012). The logarithmic scale used for the number of publications emphasizes the differences between countries with lower research outputs and those with significantly higher outputs. This scale choice can help in clearly distinguishing countries with even slight differences in their publication count. Overall, the map underscores the uneven global distribution of research endeavors in the nature-inspired domain, with certain regions clearly standing out as hubs of innovation and scholarly contribution.”

Fig. 6.

A world map depicting the distribution and concentration of nature-inspired research publications across different countries, visualized on a logarithmic scale

The table provides a ranking of the top 20 countries or regions based on the number of research papers published in the year 2022. In 2022, biomimetic research papers were published by researchers from a total of 120 different countries and regions. Of these, the leading 20 countries and regions contributed to more than 85% of all publications, while the remaining countries combined only contributed close to 15%. The majority of publications within the top 10 came from China, the United States, India, the United Kingdom, Germany, South Korea, Italy, Australia, Japan, and France (as detailed in Table 2. Notably, the composition of the top 20 countries and regions remained unchanged from 2021 (Biomimitics in 2022, International Society of Bionic Engineering 2022).

Table 2.

The top 20 countries/regions in 2022 (The number included co-authored papers)

Rank	Country/region	Number Of papers	Rank	Country/region	Number Of papers
1	Peoples R China	4946	11	Canada	232
2	USA	1526	12	Spain	229
3	India	952	13	Iran	215
4	UK	898	14	Saudi Arabia	204
5	Germany	518	15	Netherlands	178
6	South Korea	413	16	Singapore	166
7	Italy	377	17	Taiwan, China	147
8	Australia	318	18	Switzerland	144
9	Japan	305	19	Poland	138
10	France	271	20	Brazil	135

The evolution of nature-inspired materials and the prospective future of bionic materials

The evolution of materials, as revealed by history, draws inspiration from diverse sources, but none more profoundly than nature. From ancient civilizations to cutting-edge contemporary research, materials inspired by natural processes and organisms have demonstrated unparalleled adaptability, functionality, and sustainability (Vaidyanathan et al. 2020). This evolution is marked by a profound understanding of nature’s mechanisms, replicating and enhancing them for human-made applications were discussed in detail in Table 3.

Table 3.

The evolution of nature-inspired materials. Bionic materials and their applications

Sl No	Year	Material	Inspiration source	Applications	Perception
1	Ancient Civilizations	Brick	Mud and straw	Construction, housing	Fundamental building material
2	Ancient Egypt	Papyrus	Papyrus plant	Writing material	Foundation of early documentation
3	Ancient Mesoamerica	Latex	Rubber tree	Balls, footwear	Elastic and versatile
4	Ancient Rome	Concrete	Volcanic ash, sea water	Buildings, aqueducts	Revolutionized construction
5	Middle Ages	Stained Glass	Butterfly wings (color patterns)	Church windows, art	Sacred and artistic
6	1600	Rubber	Rubber tree sap	Waterproof shoes, later tires	Versatile material
7	1700	Cork	Cork oak tree	Bottle stoppers, insulation	Durable and buoyant
8	1700	Camouflage textiles	Animal camouflage	Military, hunting	Stealth and concealment
9	1800	Teflon	Lotus effect (self-cleaning leaves)	Non-stick cookware, cables	Highly resistant
10	1950	Biomimetic polymers	Biopolymers in nature	Medical, industrial uses	Functional and adaptive
11	1950	Biomimetic enzymes	Natural enzymes	Industrial processes	Efficient catalysts
12	1960	Biomimetic ceramics	Sea shells, bone	Dental and medical implants	High durability and strength
13	1970	Photonic crystals	Opal gemstone	Optical devices, sensors	Manipulating light in novel ways
14	1980	Nacre-inspired composites	Mother of pearl (nacre)	Protective coatings, armor	Tough and resilient
15	1989	Velcro	Burdock plant seed hooks	Fastening, clothing, sports equipment	Innovative and widely accepted
16	1990	Spider silk-based fibers	Spider silk	Clothing, medical sutures	Stronger than steel by weight
17	1990	Mimetic peptides	Natural proteins	Medical therapeutics	Targeted treatments
18	1990	Silk	Silkworm	Clothing, textiles	Luxury and trade commodity
19	2000	Nanostructured coatings	Moth eyes (anti-reflective)	Solar cells, displays	Enhanced efficiency
20	2000	Biomimetic robots	Animal locomotion	Exploration, medical	Adaptive and agile
21	2005	Sharklet	Shark skin	Anti-bacterial surfaces, medical implants	Promising for medical applications
22	2010	Chitosan	Crustacean shells	Biodegradable plastics, wound healing	Eco-friendly alternative
23	2010	Bio-inspired sensors	Animal sensory organs	Medical diagnostics, environmental monitoring	Sensitive and specific
24	2010	Gecko tape	Gecko feet	Adhesives, climbing tools, robotics	Revolutionary adhesive properties
25	2016	Bio-glass	Sponge skeletal structures	Biomedical implants, bone replacements	Positive for bio-integration
26	2020	Bio-inspired batteries	Electric eel	Portable electronics, medical devices	High energy density
27	2020	Biomimetic membranes	Cell membranes	Filtration, separation processes	Selective and efficient
28	2020	Bio-inspired drones	Bird flight	Surveillance, delivery	Maneuverable and efficient
29	2021	Butterfly-inspired photonic crystals	Butterfly wings	Sensors, displays, cosmetics	Potential for color-changing applications
30	2023	Mussel-inspired adhesives	Mussel-adhesive proteins	Underwater glues, biomedical adhesives	Emerging with high potential

Ancient civilizations, such as those of Egypt and Mesoamerica, pioneered the use of naturally sourced materials, underscoring the foundations of biomimetic principles. For instance, bricks made from mud and straw became the cornerstone for construction in ancient civilizations, symbolizing a fundamental building material (Nowak et al. 2021). Similarly, papyrus, derived from the Papyrus plant in ancient Egypt, heralded the advent of written communication, establishing itself as a foundation for early documentation (Taheri et al. 2021). Further afield in ancient Mesoamerica (Luhar et al. 2021), the extraction of latex from rubber trees showcased nature’s elasticity and versatility, leading to the production of balls and footwear.

Fast forward to ancient Rome, and one discerns a transformational change in construction with the introduction of concrete, formulated from volcanic ash and seawater (Fallah et al. 2020). This innovation revolutionized infrastructure, leading to the erection of durable buildings and aqueducts that stand to this day (Antonucci et al. 2019). The Middle Ages, though often seen as a period of stagnation, witnessed an amalgamation of art and nature with the development of stained glass windows inspired by butterfly wing patterns, embedding both sacredness and artistry in religious edifices (Sacred stained glass 2017).

The chronologic progression into the 1600 s and 1700s saw the emergence of materials like rubber and cork (Adelberg 2009). Rubber, derived from tree sap, manifested its versatility in applications ranging from waterproofing shoes to later forming tires (Huang et al. 2021). On the other hand, cork, sourced from oak trees, boasted of its buoyancy and durability, finding its place in bottle stoppers and insulation (Morillas et al. 2021).

The twenieth century marked a pivot in biomimetic innovations with scientific advancements at its zenith. Teflon, inspired by the lotus effect of self-cleaning leaves, became an epitome of resistance, especially in cookware (Berendjchi et al. 2011). The 1950s saw the birth of biomimetic polymers and enzymes, with applications spanning medical to industrial domains, a testament to nature’s adaptive functionality (Baino et al. 2019). Biomimetic ceramics of the 1960s, deriving inspiration from sea shells and bones, catered to medical needs due to their inherent strength and durability (Singer et al. 2023).

Emerging trends of the twenty-first century underline the amalgamation of technology and biomimicry. With advancements like nanostructured coatings, biomimetic robots, and bio-inspired sensors, the future of bionic materials seems promising (Stefańska et al. 2020). Noteworthy is the chitosan derived from crustacean shells, an eco-friendly alternative offering biodegradable plastics and aiding wound healing (Wang et al. 2015). The advent of bio-inspired drones, mirroring bird flight, holds tremendous potential in surveillance and delivery, accentuating their efficiency and maneuverability (Lee et al. 2022).

The contemporary age, especially post-2020, ushers in innovations like butterfly-inspired photonic crystals, holding potential for transformative color-changing applications, and mussel-inspired adhesives, primed for underwater and biomedical uses (Liang et al. 2022). Such innovations foretell the increasing reliance on biomimicry for problem-solving and sustainable development (Sarris et al. 2024). The potential of bionic materials for the future is set to revolutionize the engineering and design landscapes, emphasizing sustainability as a fundamental aspect. Over the next half-century, the integration of bionic materials such as spider silk-based composites, which offer unmatched tensile strength and flexibility (Gupta et al. 2023), and self-healing concrete infused with bacteria that can repair its own cracks (Topçu et al. 2020), is expected to expand across various domains. These domains include the construction of eco-friendly buildings, the development of advanced medical implants that mimic the body’s own tissues, and the creation of pollution-absorbing surfaces that could dramaticaly improve urban air quality. The prospect of bionic design, with materials like graphene for enhanced electrical conductivity and durability in electronics and chitosan for biodegradable packaging (Vilvert et al. 2023), suggests a future where technology mirrors the efficiency of natural systems. For engineers, the allure of bionic materials lies in their ability to innovate designs that are not only more resilient and efficient but also significantly reduce environmental impact. By harnessing materials like these, engineers can create solutions that are sustainable, reducing waste and energy consumption. The incorporation of bionic materials into design practices promises a future where engineering not only addresses human needs but does so by aligning closely with ecologic principles, ensuring a greener, more sustainable future.

Bio-inspired design: a journey through land, water, and air

Life on land: innovations inspired by terrestrial organisms

Case 1: Gecko-inspired adhesives

Bio-inspired design, a rapidly developing area of scientific and engineering research, seeks to harness nature’s ingenious solutions to address complex problems. The gecko, capable of adhering to almost any surface due to its unique toe pads and adhesion mechanism, serves as an exemplar in this context (Libby et al. 2012).

Geckos are renowned for their fascinating climbing abilities. They can effortlessly traverse vertical walls or hang upside down thanks to the microscopic hair-like structures on their toes, known as setae (Liu et al. 2015). Each of these setae is embellished with numerous spatulae with curved tips capable of forming weak bonds with substrates. The bonding phenomenon is attributed to the van der Waals force (Chen et al. 2013), an interaction between atoms or molecules that doesn't necessitate any permanent polarity.

The understanding of this natural phenomenon has led scientists to explore the concept of robust, reversible adhesion, often referred to as ‘dry stick’ (Zhou et al. 2013) mechanisms. This principle, rooted in the Surface Contact Area Mismatch Theory (SCAM) (Lyashenko et al. 2016), posits that the pad size is relative to the gecko’s weight ratio, creating variations across different species. The principle also elucidates that the multiplicity of contact points amplifies van der Waals interactions. Consequently, geckos can achieve a stable hold that withstands stress up to three times their body weight, a feature that is both intriguing and inspiring for researchers and engineers.

Motivated by the unique adhesion characteristics of the gecko, scientists have sought to transfer this biologic concept into practical applications. The potential use cases of gecko-inspired adhesion are wide-ranging, spanning from medical bandages and drug delivery systems to robotics and advanced space technologies (Chen et al. 2013). For instance, in the realm of disaster management, gecko-inspired adhesion could facilitate safe navigation across various terrains (Gamble et al. 2012). This capability could accelerate repair and reconstruction efforts in post-disaster scenarios, demonstrating the real-world impact of such bio-inspired designs.

The potential of gecko-inspired adhesives to transform a multitude of industries, including aerospace, aviation, medicine, and robotics, is immense. While current research predominantly utilizes natural materials, future explorations are expected to venture into the development of novel bio-composites (Gamble et al. 2012). These innovative materials will blend synthetic polymers and nanoparticles engineered with specific self-assembly properties. This will drive the mastery of dry adhesive mechanisms, propelling the field further into uncharted territories.

The promise of gecko-inspired adhesives, hinged on leveraging van der Waals interactions (Space applications for gecko-inspired adhesives 2022), is not confined to scientific research alone. This technology holds the potential to revolutionize a multitude of fields, from medical applications to robotic tasks and meticulous space repairs. By reducing risk and driving progress, this bio-inspired approach underscores the potential for innovation that respects and harnesses the rules of nature.

Case 2: leaf-inspired air filtration

The issue of air pollution persists as a worldwide obstacle, causing significant health and environmental consequences. The World Health Organisation states that air pollution impacts 90% of individuals on a daily basis, leading to around 7 million deaths each year (Air Pollution Report, WHO 2021). Novel resolutions are imperative to tackle this issue effectively. Such resolutions must not amplify environmental encumbrances or have detrimental effects on human well-being. The burgeoning realm of biomimicry proffers a captivating resolution: air filtration that mimics the leaves.

Leaves have minuscule openings known as stomata, which facilitate the exchange of gases between plants and their environment and serve as a vital defense mechanism against aerial contaminants (Frank et al. 2017; Kamtsikakis et al. 2021). Stomata present a biologic tactic that scientists deem could be utilized to formulate novel substances with improved attributes that cannot be achieved solely through molecular chemistry. These materials may also furnish economic instruments, facilitating extensive fabrication and prompt deployment, particularly in developing nations (Oguntona et al. 2020).

The designed microstructure that amplifies permeability in stomatal structures on foliage exteriors, controlling water absorption in times of drought, presents a superb biomimicry prototype for air filtration. The utilization of this innate occurrence has facilitated the formation of regions for the elimination of minute particles through amplified drag forces, resulting in the establishment of habitats with purified and breathable indoor atmospheres. HEPA filters that are available for commercial use are presently utilized for the elimination of perilous indoor particulate matter (Enkhbat et al. 2021). The substitution of said filters with biomimetic ones that capture more than 99% of PM1 thresholds could bring about substantial advantages to communities impacted by wildfires, volcanic ash emissions, and seasonal pollution caused by pollen grains (Oguntona et al. 2020).

Researchers have demonstrated the efficacy of leaf-inspired biomimetic designs in eliminating micro- and nanoparticles from indoor environments. By employing engineering methods and mimicking natural approaches, researchers have devised filters with improved capabilities that can be widely used, ranging from domestic sanitation to mitigating minuscule contaminants in heavily populated indoor settings. This technology employs a drag-based mechanism, eradicating internal heat production and presenting a substitute to energy-intensive electrostatic charged fibrous substances (Saiding et al. 2022).

Notwithstanding their preliminary triumph, the realisation of such blueprints in pragmatic frameworks poses formidable obstacles. Additional scrutiny is necessary to authenticate their functionality amidst fluctuating environmental circumstances, establish their feasibility on a large-scale industrial level, and juxtapose their effectiveness with pre-existing substitutes. The fulfilment of sustainability requirements will be reliant upon the utilization of a comprehensive methodology for product testing, which encompasses life-cycle assessment and cost-effectiveness analysis.

Case 3: termite mounds -inspired building design

Termite mounds, regardless of their ostensibly rudimentary essence, harbour an extraordinary plan for a plausible upheaval in modern architecture. The intricate edifices, abode to myriad termites, astoundingly uphold consistent internal temperatures, regardless of external meteorologic extremities. The exceptional thermoregulation of these structures has captivated scientists, leading to extensive investigation of their distinctive architecture (Willocx et al. 2021). The discoveries have presented pioneering resolutions for energy-conserving edifice blueprints, making a noteworthy advancement towards eco-friendly construction.

The inspiration derived from termite mounds is progressively assimilating into contemporary architectural practices. Typical domiciles frequently struggle with elevated utility expenses owing to extensive thermoregulatory mechanisms that accommodate diverse local weather patterns. The implementation of such practices not only results in an increase in the consumption of power but also leads to environmental degradation due to the generation of significant carbon footprints (Sarkar et al. 2018). Architects, engineers, and biologists are presently working in unison to fashion eco-friendly edifices that emulate the structural design of the colossal 30-foot African termite mounds, thereby leading to diminished energy usage and negligible carbon footprints (Oguntona et al. 2023).

The Eastgate Centre Mall in Zimbabwe is a remarkable exemplar of termite-inspired design. Mick Pearce, the architect, conducted a thorough investigation on how ‘Termimesos mossambicus’ (Oberst et al. 2020) termites-maintained moisture levels in their structures without the use of HVAC systems (How Termites Inspired Mick Pearce’s Green Buildings 2019). Based on this study, he created a design for the mall. The architectural design places chimneys near the warmest regions, redirecting the hot air upwards and thereby cooling the incoming fresh air. The blueprint guarantees supreme air quality within enclosed spaces, rendering it suitable for human habitation.

The aforementioned designs not only achieve a 90% reduction in energy consumption when compared to conventional HVAC systems but also limit carbon footprints by utilising recycled materials and sustainable goods (Almusaed et al. 2020). Moreover, these structures that are climatized passively may have potential applications in extra-terrestrial environments such as Martian habitats or advanced climate control programmes on Earth. The edifices, depending entirely on solar energy, may offer self-sufficient characteristics and a noteworthy advancement towards eco-friendly construction.

The complex network of interlinked tunnels within termite mounds functions as both ingress and egress points for unfettered air circulation. The thermal control enabled by slender and permeable external barriers composed of earth elements functions akin to insulating substances, reflecting incident solar radiation and reducing thermal conduction (Räsänen et al. 2023). Emulating these characteristics in edifice edification has yielded noteworthy abatements in preservation methodologies, ergo diminishing space warming and chilling tactics.

Architects and engineers are utilising diverse methodologies like solar chimneys, cavity-assisted underfloor outflow techniques, and cavity-based hot-wall tangential ventilation employing integrated ducts and insulated filling material to enhance building functionalities (Inclusion, diversity, equity and accessibility in the built environment 2022). Moreover, the utilization of nanomaterial coatings emulating naturally transpiring microstructures engenders oxide-infused paints that uniformly disseminate heat, obviating the necessity for conventional air conditioning remedies.

The extraordinary potential of this technology inspired by biology extends to the possibilities of colonising Mars. The implementation of thermoregulation tactics may sustain habitability in the face of significant temperature variations on the surface of Mars (Wei et al., 2019). In addition, climate-regulating mechanisms featuring enhanced bubble dimensions encased in external concrete structures may provide pleasant indoor surroundings in erratic weather conditions, curb HVAC usage, and promote an eco-friendly power network.

The biomimetic designs doth present groundbreaking ways to construct our structures today. They provide low carbon footprints while incorporating comfort-centric architectures, thus playing a pivotal role in accomplishing intricate emission targets and laying the groundwork for a zero-energy, biosphere-compliant, and harmonious planet of the future (Biomimetic Buildings: Copying Nature for Energy 2018).

Case 4: woodpecker-inspired shock absorption

Woodpeckers, renowned for their capacity to repeatedly strike trees with tremendous force without succumbing to brain damage or skull fractures, have captivated scientists for decades. The avian’s exceptional ability to endure high-G forces is made possible by its specialized cranial structure, a wonder of the natural world that has inspired impressive advancements in the field of mechanic engineering (Bajpal et al. 2023).

These designs, inspired by nature’s processes, creatively tackle real-world issues. The avian creature known as the woodpecker possesses a unique skeletal composition that offers significant revelations regarding the intricacies of shock absorption mechanics (Egan et al. 2015). The principles aforementioned have been employed by engineers to fabricate systems with the sole purpose of safeguarding delicate organs during high-impact collisions, such as those encountered in automotive mishaps.

The attainment of efficient shock absorption designs necessitates a subtle equilibrium between pliability and potency, traits that frequently appear to be in conflict within the confines of safeguarding equipment. These challenges are tackled via a thorough scrutiny of the anatomic traits of woodpeckers (Wassenbergh et al. 2022). The pivotal roles are played by three key factors: the length and shape of the beak, the thickness of the cranial bone walls, and the alignment of prevalent resistance pathways to external load direction.

It is of interest that woodpeckers possess exceedingly specialized cranial sutures, which display remarkable flexibility and react accordingly to enhance their overall bioshock safeguarding. This exceptionally adaptable reaction has motivated scientists to delve further, reproducing these naturally transpiring dynamic behavior patterns artificially. The outcome entails the emergence of proficient damping substances, frequently denoted as meta-substances (Zhang et al. 2015a, b). The aforementioned substances, distinguished by intricate microscopic configurations and modular permeability, amplify structural heterogeneity and proficiently alleviate high-impact forces.

The immense potential of bio-inspired designs is noteworthy, with applications ranging from vehicle safety systems to seismic building design. Remarkably, American football players and military personnel presently employ pioneering helmet Technology inspired by the exceptional shock absorption capabilities of the woodpecker. The utilization of metamaterials in safeguarding equipment has resulted in enhancements in the proportion of flexibility to strength and a noteworthy decrease in the possibility of incisions during impacts or recurrent kinetic stimuli (Fan et al. 2019).

The progressions also expand to encompass more all-encompassing defensive measures, like the Layered Armour Systems (LAS) implemented in ground-to-air conveyances and earthquake-vulnerable edifices. These systems protect the populace, armed forces, and governmental structures from various perils caused by external impacts and consecutive malfunctions. They also serve multifaceted purposes, enhancing response times through highly sensitive sensor arrays and significantly boosting overall civil security levels.

The woodpecker’s exceptional shock absorption method has unlocked novel possibilities for effective design and security in diverse sectors, tackling dynamic obstacles in practical situations. The principle hath been widely employed in the creation of helmets and packaging materials, bestowing superior safeguarding and augmenting the efficiency of shipping. It has furthermore infiltrated the automotive sector, augmenting the safety mechanisms of vehicles by guaranteeing minimal injury to operators in the event of collisions.

The future harbors the immense potential for designs inspired by woodpeckers, especially in sectors that are restricted by safety concerns, such as seismic building design. By augmenting command mechanisms and fortitude against decay, these blueprints may streamline recuperation procedures following a calamity. While present utilization may be restricted, persistent theoretic contemplations imply that forthcoming implementations shall assuredly augment capabilities, resulting in affirmative consequences and advancement.

Case 5: spider silk-inspired materials

The captivating fascination of spider silk has perpetually enthralled the scientific community. The naturally transpiring biopolymer, spun by arachnids into complex web designs, possesses an unparalleled amalgamation of characteristics that distinguish it from both artificial and other biogenetic obtained substances (Xu et al. 2020). The exceptional potency, adaptability, and resilience of spider silk have elevated it to a prestigious position in the domain of biomimicry and materials science, presenting a hopeful plan for the creation of forthcoming multifaceted engineering materials.

The singular mechanic characteristics of spider silk can be ascribed to its exceptional structural configuration (Zhang et al. 2015a, b). A fibrous substance composed of protein, exhibiting a high degree of organization in its crystalline beta-sheet formations, which are intermingled with regions of amorphous cysteine-rich material. The aforementioned configuration engenders a filament which, notwithstanding its fragile facade, manifests exceptional tensile potency and can endure significant strain sans fracturing (Cranford et al. 2012). Moreover, the crystal-like beta-sheet formations bestow upon the fiber a remarkable level of pliancy, endowing it with substantial potential for energy dissipation while undergoing deformation. The exceptional characteristics of spider silk make it a prime contender for bio-inspiration, with the possibility of its implementation in various domains (Tian et al., 2020).

The worth of spider silk-inspired materials is already being proven by their existing applications. Biodegradable ropes, inspired by spider silk, display remarkable strength and durability, rendering them suitable for intricate and environmentally friendly rope structures. In the domain of defense, the pliancy of spider silk has been utilized to fabricate featherweight body armor, furnishing exceptional safeguard against ballistic impact while diminishing the corporeal strain on the user (Pan et al. 2020). The aforementioned applications, however, only skim the surface of the vast possibilities that could be attained with materials inspired by spider silk.

The forthcoming of spider silk biomimetics is overflowing with exhilarating possibilities. In the realm of construction, substances emulating the tenacity, malleability, potency, and flexibility of arachnid filaments possess the potential to transform our methods of fabrication (Lin et al., 2014). These materials possess the capability to supplant conventional construction materials like steel or concrete. In addition, they hold the pledge of providing more sustainable substitutes by virtue of their biodegradable nature, thereby reducing their environmental impact.

The future vision doth extended even further, reaching into the realm of space exploration. The concept of space elevators has been a cherished aspiration of the aerospace sector for a considerable time. With the aid of spider silk-inspired substances, it may be possible to actualize these mechanisms that could facilitate the conveyance of commodities and individuals to and from space, sans the requirement for exorbitant and ecologic detrimental rocket launches (Asakura et al. 2020). The ideal suitability of constructing the cables required for such a system is due to the high tensile strength and elasticity of these materials.

Nonetheless, the forthcoming era is not bereft of its obstacles. At present, the precise duplication of spider silk’s distinct characteristics remains evasive, and the production of materials inspired by spider silk on a grand scale is still a noteworthy obstacle to surmount. However, through persistent investigation and advancement, the epoch may arrive when we can entirely seize the potential of this extraordinary organic substance (Perras et al. 2015).

Life in water: innovations inspired by aquatic organisms

Case 1: shark skin-inspired hydrodynamic designs

Designs The pursuit of creating effective hydrodynamic systems has persisted as a noteworthy obstacle within the domains of engineering and materials science. The endeavor grows stronger, particularly in the field of conveyance implementations such as vessels, where the curtailment of resistance and amplification of energy efficacy may lead to noteworthy monetary conservation and ecologic advantages (Bhasin et al. 2018). The realm of bio-inspired designs has presented encouraging resolutions as of late, one of which intriguingly emanates from the epidermis of sharks.

At the nucleus of the marine biologic realm, sharks possess distinct integumentary characteristics that are primed for biomimicry stimulation (Feld et al. 2019). Upon meticulous examination of their skin surface, it has been observed that scales exist with a unique arrangement and microstructure (Gu et al. 2020). The minuscule ridges, denoted as denticles in the scientific realm, are arranged on the shark’s physique in a manner resembling the systematic arrangement of shingles on a rooftop (Wang et al. 2021).

The natural configuration has sparked the curiosity of scholars in diverse domains, ranging from biology to material sciences, prompting a surge of cooperative investigations. The research efforts have made significant progress in comprehending how imitating the surface configuration of shark skin artificially can considerably amplify the efficiency of subaquatic crafts (Gao et al. 2019). Diverse-replication methodologies have been implemented, encompassing the utilization of silicone-based epoxy coatings on vessel hulls and the creation of swimsuits utilizing innovative computer-aided manufacturing techniques that provide adaptable design alternatives (Fan et al. 2022a, b).

The small teeth-like structures on the skin of sharks, though appearing insignificant, have a vital function in lessening the resistance caused by friction. They generate tiny whirlpools at greater Reynolds numbers, which is a crucial factor governing the flow of fluids around objects that are immersed (Zulkefli et al. 2019). The manifestation of decreased resistance has been demonstrated to yield enhancements in fuel consumption, with documented reductions surpassing 20% (Anderi et al. 2015).

The enhancement in energy efficiency leads to direct reduction in expenses, providing concrete advantages without jeopardising the velocity or steadiness of the vessel. The valuable possibilities have attracted noteworthy investment, propelling progressions in this biologic-inspired design inclination.

The utilization of technologies like artificial intelligence has played a crucial role in improving the duplication procedure, amplifying precision, and diminishing the likelihood of falsification blunders (Mackinnon et al. 2020). The consequences are of an economic nature, dependable, and compared to internationally acknowledged performance metrics, thereby guaranteeing the utmost quality standards and optimising novelty.

The domain of conceivable implementations for hydrodynamic designs inspired by shark skin extends well beyond their original impetus in marine transportation (Sharma et al. 2023). This technology presents an opportunity for the transportation industry to benefit from enhanced energy efficiency, environmental sustainability, and cost reductions. In a time of diminishing oil stores and unstable fuel costs, the decarbonizing impact of this biomimicry pattern acts as a signal for a more sustainable ecologic approach (Othmani et al. 2022).

Apart from its maritime applications, this technology exhibits beneficiary avenues in industries spanning from the production of subaquatic vehicles to the configuration of wind turbine blades. In the domain beyond aqueous enterprises, the likelihood of enhanced fuel efficiency and diminished operational expenditures in aeronautics through the utilization of aircraft designs inspired by shark skin is also gathering impetus. The verdant imprint mirrored by these applications conforms aptly with wider worldwide sustainability objectives (Biomimetic shark skin: Design, fabrication and hydrodynamic function 2014).

In certainty, the imitation of shark skin in biomimicry offers a fresh and effective substitute in the quest for decreased expenses and amplified efficiency. The commitment it holds stretches well beyond just sustainability—it is positioned to bring about a revolution in diverse sectors, altering the industrial terrain in manners once thought unattainable. It is evident that the investigation of the capability of this biologic-inspired wonder is merely in its nascent stages.

Case 2: mussel-inspired underwater adhesives

The utilization of bio-inspired technology incessantly modifies the chronicles of scientific advancement, proficiently accessing nature’s vast collection of refined resolutions to engineering predicaments. The fascinating realm of mussel adhesive proteins presents novel possibilities for developing robust adhesives capable of functioning under wet conditions (Chiloeches et al. 2019).

The marine molluscs, commonly referred to as mussels, are recognized for their exceptional adhesive characteristics. They discharge proteins from specific foot glands, which are identified as the mussel byssus. The proteins facilitate the mussels’ ability to firmly attach to diverse surfaces, despite the severe circumstances of marine habitats (Yoo et al. 2021). The utilization of these adhesive proteins for the production of synthetic analogues is being acclaimed as a revolutionary development in the field of underwater construction, medical adhesives, and marine equipment mending (Park et al. 2017).

The Adhesive Mussels Proteins (AMPs) are of great interest as they demonstrate the capacity of natural systems to generate intricate polymers at the surfaces of nanoparticles, offering valuable perspectives for the creation of analogous synthetic polymers. The fundamental aspect of these adhesives’ operation is the endmost chemical branches within their configuration that facilitate a coral-like grouping adhesion arrangement on the exterior (Hao et al. 2023), generating a multi-tiered configuration for grasping exteriors, including in damp circumstances.

The aforementioned proteins display a tensile potency within the 5–20-MPa spectrum, surpassing numerous customary adhesive substances such as polyvinyl acetate (PVA) based adhesives, which usually exhibit tensile strengths of roughly 2–7 MPa. Their remarkable adhesion prowess, even amidst damp surroundings, distinguishes them from the majority of artificial adhesives that typicaly forfeit their adhesive characteristics in the existence of aqueous substances (Tao et al. 2022).

At present, the medical and dental domains have derived advantages from these adhesives inspired by mussels. Synthetic properties exhibit elevated bio-compatibility, reduced cytotoxicity, and superior adhesion in moist surroundings, rendering them optimal contenders for biomedical purposes where conventional staples or sutures may be inadequate. As an illustration, they are presently employed in the fixation of sizable implants, proffering an adhesive potency of about 5 MPa, outshining the efficacy of fibrin-based medicinal adhesives that proffer roughly 3 MPa of adhesive potency (Mian et al., 2017).

In the domain of subaquatic construction and maintenance of marine apparatus, the conceivable uses of adhesives inspired by mussels are vast. Considering their steadfastness in moist environments and formidable adhesive potency, they possess the capability to curtail upkeep expenditures for subaquatic edifices such as pipelines or oil rigs notably. The protracted existence of these adhesives, combined with their imperviousness to deterioration in aqueous surroundings, may substantially enhance the dependability of oceanic structures, culminating in noteworthy economic and ecologic advantages (Zhao et al. 2017).

Through the meticulous calibration of these adhesives' characteristics, researchers can fabricate substances that exhibit precise levels of adhesiveness, pliability, and resilience. By means of meticulous manipulation of the adhesive’s polymer composition and crosslinking, scientists have the capability to produce substances that can withstand tensile strengths of up to 30 MPa—a remarkable enhancement over the mussel-adhesive proteins that exist in nature (Ahn et al. 2015).

The prospective of adhesives inspired by mussels rests upon their sustained amalgamation with modern engineering and manufacturing methodologies. Adaptive manufacturing techniques, encompassing 3D (three-dimensional) printing and other additive manufacturing forms, may have a pivotal function in producing structures and apparatuses that utilize these adhesives efficiently. Furthermore, amalgamated applications that merge mussel-mimicking adhesives with other substances and technologies may result in groundbreaking blueprints and resolutions (Omran et al. 2021).

Case 3: octopus-inspired soft robotics

The evolution of nature has undoubtedly inspired innovators in many fields, including engineering and medical sciences. In particular, researchers today are looking to develop technologies that integrate features from nature’s most adept creatures, acting as a source of promising solutions for specific problems. Inspired by the extraordinary flexibility and dexterity of octopus tentacles, researchers have developed "soft robotics" (Zhang et al. 2022a, b). A breakthrough technology demonstrating perfect balance between rigidity and softness facilitates safe human-to-robot interaction and their ability to adapt impeccably to changing situations. This mimicry has all sorts of practical applications ranging from search-and-rescue robots on land/ sea or offshore monitoring systems (Zhang et al. 2021).

Octopuses are known for their highly agile movements, making them ideal candidates for models intended for creating modern shape-shifting robots. Teams adopting a bio-inspired approach duplicating an octopus’s anatomy made designs around networks mimicking parallel structures extending up each arm showing great soft-movement features or texture variations controlled by tiny pressure sensors pushing moldings softened mild metals like silicone under variable amounts of pipe shrinking depending on temperature sensors (Zhang et al. 2022). This unique principle emulates the octopus’ muscle action, adapting flexibly depending upon stimuli triggered around which this wonder solution is conceptualized. This may lead towards more efficient soft robotics implementation across the industrial domains and beyond (Lo et al. 2021).

Various research cases indicate equally-suited adaptability provisions matching conventional hard rigid mechanisms pursuing application-development possibilities beyond industries involving surgical substitutes/prostheses due to human-identical compliant contacts hence enhancing smooth health care practices treatment experiences enveloped into remarkable traditional macro-scale mobility studies (Kolachalama et al. 2020) significantly forward compared to contemporary techniques archaicaly prevailing providing ability efficacy comparable contrasting previously-imparted tangible insights not merely aiding subject matter innovation marvels but conventionally applicable experience equilibrates stunning groundbreaking junctures and then advocating industry-wide expansion moving forward aligning facilitated mainstream domain takeover achievement thereof emphasizing productive dimensions exclusively knowledgeable collaborated cross-industry requisite skill manifestation enriching maintainable elements indicating biomimic treatments being demonstrated through prototypes (Zang et al., 2022) attesting to grasp diverse perceived forms greatly abundant unexpected sectors hallmarked by exceptionally resplendent user-significance targeting every aspect into its entire package of an economic holistic en route essential impact-domains (Choi et al. 2017).

Scientists across the globe are extensively committed to developing appropriate soft-matters illustration demonstrating machines proving bi-efficient and effective treatment seamlessly harmonizing traditional prosthetic devices implant possibilities claiming prowess over physical labor domains while robotic-led facilitation delivering such deployments alleviating numerous chronic concerns supporting cause-benefit low-cost benefits abundant worthy activities providing clinicians symbiotic ecosystem (Cosmo et al. 2021) coalesced ideally-demanding discerning upgrade compatibility cross-sectional harmonization both in this short-term sector transformatively invasive functionality appropriately managing defects into surgical improvisations (Robotic surgery: an evolution in practice 2022) coupled bioinformatic therapies joining inter-inclusive specialist areas on a flexible resilient platform linked non-invasively catering pervasive solutions operating autonomously where nuclear-level detail variables showing proportionate assistance active-leader augmentation steps working closely within construction bonds designing autonomous cum ergonomic problem solving interdisciplinary knowledge ripe for convergence improbable before relevant advancements spiralling emphaticaly changing our standards of carrying out effective economic processes obliterating unresolved barriers and perspectives allowing more ingenious frameworks adoption unabridged no longer segregation from regulatory obligations mixed consequently liberating programmatic’s harness hardware leading potential groundbreaking direction confirming feasible while flexible powering novel gadget manufacturing paradigm suitable for overlying total synchronizations actualizing disidentification times pan-utilized complex-solutions executing outcomes capable cruising any control circuit parameters previously appeared unthinkable immensely handling potent influence left unsurpassed (Tian et al. 2016).

The incredible dexterity and flexibility displayed by the octopus have captivated researchers for years, inspiring innovative advancements in soft robotics. In this section, we delve into the mesmerizing world of deep-ocean organisms and explore how the remarkable behavior of an octopus can open doors to a new era of technology (Octopuses keep surprising us - here are eight examples how., 2020). Bio-inspiration lies at the heart of these developments, with octopus tentacles being a major source of inspiration. These limbs possess remarkable properties that enable precise movements and adaptive behaviors. By studying these elegant appendages, scientists have made significant strides in developing soft robotic systems that mimic the functionality and capabilities of an octopus.

Flexibility and dexterity are key mechanical properties observed in octopus tentacles to achieve their unique locomotion and interaction abilities. Unlike conventional rigid robots, soft robots designed based on an octopus’s anatomy can gracefully navigate complex environments while adapting their shapes to various objects. The versatility inherent in these bio-inspired designs offers immense potential for applications across different fields (Li et al. 2019). In current applications, soft robotics finds utility primarily in prosthetics and automation tasks in challenging environments. Engineers have successfully incorporated bio-inspired concepts into robotic prosthetic devices by drawing cues from nature’s design brilliance. By recreating the delicate movement of human fingers found in an octopus’s tentacle-like structure, mechanical engineers have greatly enhanced individuals’ quality of life, restoring functionality previously thought unimaginable (Egan et al. 2015).

Furthermore, marine exploration utilizes this biomimetic approach through underwater robots that employ parallel articulating tentacles resembling those of an octopus. Such multi-functional machines excel at data collection (Zhao et al. 2021) and possess advanced manoeuvring capabilities that ensure minimal environmental disruptions during observation projects (Akram et al. 2021). These innovations provide invaluable insights into oceanic ecosystems while simultaneously reducing risks associated with traditional exploration methods. Looking ahead to future implementation reveals exciting prospects for search-and-rescue operations and surgical support systems leveraging octopus-inspired soft robotics technologies. The ability to wriggle through narrow openings combined with the adaptability to grasp objects of various shapes and sizes grants these robots unmatched potential in disaster scenarios or complex surgical procedures (Behera et al. 2023).

As with any emerging field, challenges remain in achieving meaningful advancements. One obstacle lies in improving material capabilities to match the remarkable properties exhibited by natural tentacles (Tsompanas et al. 2021). Elasto-adhesive materials capable of adhering to different surfaces while providing sufficient grip strength pose as a key focus area for researchers. Similarly, developing more efficient control systems that can handle intricate movements in real-time is critical. Another avenue for exploration involves optimizing power sources and energy efficiency to ensure prolonged operation times necessary in extended surgical procedures or long-duration search-and-rescue missions (Biundini et al. 2021). In tandem, optimizing feedback mechanisms such as advanced sensing technologies plays a vital role, in enhancing the robotic system’s ability to understand its environment accurately (Brahmi et al. 2023). The future of octopus-inspired robotics appears bright as engineers and scientists continue pushing boundaries through close collaborations across multiple domains. Ongoing research focusing on sensor fusion techniques and bio-inspired control algorithms help create sophisticated systems that closely imitate an octopus’s intelligent behavior while expertly navigating challenging environments (Adar et al. 2021).

Potential breakthroughs may unlock novel medical applications such as minimally invasive surgeries enabled by miniature soft robots resembling the dexterity and elasticity of octopus tentacles. In addition, transferring knowledge gained from deep-ocean organisms into land-based applications (Damiati et al. 2022) like automated textile handling or delicate manufacturing tasks holds exciting potential for tool-handling assemblies.

Case 4: seashell-inspired impact-resistant materials

The irresistible charm of nature’s profound mysteries has perpetually summoned the scientific community, propelling the limits of human imagination towards solutions that encapsulate the exquisite brilliance of evolution, meticulously refined over countless millennia. This enduring captivation is particularly remarkable in the realm of mechanical engineering, wherein nature’s unparalleled expertise in structure, form, and function (Willocx et al. 2021) presents a plethora of inspiration. In emulating these intricate natural constructs, bio-inspired designs offer novel methods to alleviate the challenges of the contemporary era, thus serving as a testament to the merits of acquiring knowledge from life’s enduring workshop. An exemplary illustration of this biomimetic methodology resides in the investigation of seashells and the utilization of their innate impact resistance characteristics in the advancement of cutting-edge materials (Titirici et al. 2022).

Seashells, those exquisite exoskeletons of the marine world, exhibit extraordinary resilience (New insight into the toughening mechanisms of seashell: From 2016), which is rooted in their distinct hierarchical structure. These shells, a splendid embodiment of nature’s remarkable engineering capabilities, showcase elaborate patterns on a grand scale, skilfully dispersing stress and enhancing structural resilience (Atanasiu et al. 2022). Upon scrutinizing these intricate formations, one can discern their intricate microstructure primarily composed of calcium carbonate (CaCO3) crystals, intricately interwoven within an organic matrix abundant in proteins (Hata et al. 2022). The remarkable configuration of rigid and pliable substances, featuring a stratified and alternating composition, bestows upon seashell composites their formidable durability (Báez et al. 2013).

The notion of toughness, an essential mechanic characteristic that embodies a material’s capacity to assimilate energy amidst collisions without experiencing complete fracturing, finds embodiment within seashells (Liang 2021). The shells possess an extraordinary aptitude for dispersing energy via a structured arrangement of controlled impairment, as opposed to succumbing to a calamitous collapse. The aforementioned mechanism is predominantly ascribed to the hierarchical and incremental shift amidst rigid mineral layers and pliable organic interfaces within their composition (Yuan et al. 2016). These interfaces serve as highly effective crack inhibitors, impeding the propagation of cracks within the material and thereby greatly augmenting its resistance to impacts (Fan et al. 2022a, b).

The remarkable durability and capacity for absorbing impact exhibited by materials inspired by seashells have established a specialized role in the advancement of protective equipment. From helmets to body armor and even car bumpers, these biomimetic materials are revolutionizing safety equipment, much like the profound impact they have on the realm of protection (Connors et al. 2019). By exploiting the structural principles witnessed in seashells, these defensive materials present themselves as lightweight yet formidable substitutes for customary amours, typicaly crafted from ponderous metals or synthetic composites.

However, notwithstanding the promising potential, a multitude of impediments have arisen in the face of the ubiquitous implementation of seashell-inspired substances in safeguarding apparatus. The widespread adoption of these technologies is curtailed by factors such as intricate manufacturing requirements, challenges in scalability, and the necessity for mechanical optimization (Chen et al. 2023). However, as the field of material science progresses at an accelerated pace, under the guidance of swift advancements in engineering methodologies and technologies, the prospect of surmounting these challenges appears within reach.

When contemplating their present applications, materials inspired by seashells possess vast potential for reconfiguring the terrain of the constructed surroundings. Their remarkable stress dispersion and impact resistance capabilities render them as prospective contenders for deployment in infrastructure construction (Bamigboye et al. 2021). The amalgamation of these substances has the potential to greatly strengthen edifices in the face of formidable occurrences such as seismic tremors, detonations, or unanticipated structural failures, thereby engendering safer and more enduring constructions.

In the realm beyond our earthly confines, the resilience and lightweight characteristics of materials inspired by seashells ignite a profound interest in their prospective applications within the domain of aerospace technology. As the ambitions of space missions expand, encompassing the colonization of planets and venturing beyond the boundaries of our own celestial abode, the imperative for proficient protection against micrometeorites and cosmic radiation escalates in parallel. The intriguing avenue of exploration lies in the potential role of these biomimetic materials as advanced outer shields for spacecraft, owing to their inherent toughness and lightweight nature (Chen et al. 2023).

In final analysis, the durability of materials inspired by seashells not only serves as a prime example of nature’s remarkable engineering abilities but also holds the key to potential advancements in various industries where the ability to withstand impact damage is of utmost importance. The utilization of these innate patterns in safeguarding apparatus, the architectural sector, and celestial technology alludes to an impending era wherein the demarcation between natural and artificial edifices persists in its state of ambiguity. As we venture forth into an era of unparalleled technological advancement, the enduring blueprints of nature, exemplified by the unassuming seashell, assume an invaluable role in shaping our trajectory.

Case 5: fish school-inspired coordination algorithms

In the realm of nature, each ripple, each swirl, and each undulation of life presents a captivating spectacle of intricacy and elegance, brimming with meticulously refined principles of arrangement that have undergone billions of years of refinement. In the vast spectacle of existence, one encounters a captivating assemblage: the collective of aquatic creatures known as schooling fish (Guan et al. 2021). This synchronized spectacle of piscine behavior, wherein each entity moves in seamless harmony with its counterparts, orchestrates a captivating exhibition that has aroused the curiosity of observers across various disciplines, particularly those in the realms of mechanical engineering and robotics (Li et al. 2021). The remarkable insights derived from the fluid coordination and decentralized control exhibited by schooling fish have provided unparalleled guidance in the design of efficient and resilient systems. These insights have already been embraced to bring about a revolutionary transformation in the advancement of coordination algorithms.

The schooling behavior (Implicit coordination for 3D underwater collective behaviors in a fish 2021) observed in Fish vividly portrays the captivating concept of decentralized control within a dynamic environment. The seemingly paradoxical nature of the fluidity and cohesion displayed by schools of fish becomes apparent when one contemplates the fact that each individual fish is acting autonomously. With the aid of lateral line sensors and optical sensors, every fish within the school adeptly reacts to its immediate surroundings, skillfully upholding an ideal separation from its companions, synchronising its motions, evading collisions, and swiftly responding to potential dangers. In its essence, what arises from this conduct is not solely a material characteristic but rather a principle of synchronized motion and activity, which is remarkably efficient in regard to energy expenditure (Zheng et al. 2005).

This extraordinary interplay of autonomous action and collective behavior has resonated profoundly within the domains of mechanical engineering and robotics, serving as a source of inspiration for the advancement of pioneering algorithms that govern the coordination of independent systems. The observation of biomimicry holds particular significance when considering the advancement and functioning of Autonomous Underwater Vehicles (AUVs) (Manawadu et al. 2023). Through the amalgamation of decentralized control and fluid coordination, akin to the observed behaviors within fish schools, ingenious algorithms have been formulated with the aim of augmenting the resilience, adaptability, and efficacy of AUV swarms (Dong et al. 2021).

These AUV swarms, drawing inspiration from the collective intelligence of fish schools, possess the ability to adapt their arrangement in real-time as a direct response to alterations within the submerged surroundings. When faced with an obstacle, the AUV alters its path, akin to the response of a fish to a predator (Kazimierski et al. 2021). This allows for a secure distance to be maintained while also communicating to other vehicles to execute comparable evasive actions. This enables the collective to maintain their configuration while traversing intricate subaquatic landscapes, and in the occurrence of a malfunction in one AUV, the remaining units can effortlessly proceed with the assignment, guaranteeing uninterrupted functionality (Honti et al. 2019).

The implementation of these bio-inspired algorithms has already exhibited their potential in real-world scenarios. One such occurrence encompasses a thorough examination of an aquatic expanse akin to the dimensions of Costa Rica, wherein a multitude of AUVs were assigned the duty of cartographically delineating the submerged terrain. The AUVs, under the guidance of algorithms inspired by the collective behavior of fish, successfully completed this mission with remarkable accuracy and effectiveness, resulting in a conservation of approximately 20% of energy when compared to conventional approaches (Zheng et al. 2020a, b).

The potential application of these bio-inspired coordination principles extends beyond the aquatic realm. The burgeoning realm of self-governing traffic systems holds immense potential for reaping substantial advantages from these algorithms inspired by educational institutions. The escalating compactness of urban surroundings compels the imperative for proficient, secure, and enduring transportation systems. Through the replication of the seamless coordination witnessed in schools of fish, autonomous vehicles possess the capability to proficiently traverse congested urban thoroughfares, thereby diminishing collisions and enhancing the efficiency of traffic circulation (Zhu et al. 2022).

In a similar vein, the burgeoning realm of swarm robotics, with its objective of orchestrating the endeavors of numerous robots towards a shared objective, stands to gain considerable advantages from these fundamental principles. In various domains, be it disaster response, agriculture, construction, or any other field, the utilization of swarm robots, adhering to the decentralized and fluid coordination principles observed in fish schools, can effectively amplify operational efficiency and fortitude (Kuckling et al. 2023).

Life in air: innovations inspired by aerial organisms

Case 1: bird-inspired aerodynamic designs

In the unending pursuit of human progress, nature acts as a source of inspiration, presenting extraordinary designs honed through countless millennia of evolution. In accordance with the astute observation made by Leonardo da Vinci, “For once you have tasted flight, you will walk the earth with your eyes turned skywards, for there you have been and there you will long to return” (Lemma et al. 2013). This sentiment is evident in the examination of avian flight, a remarkable accomplishment of biological engineering honed by nature over countless ages, and a model of bio-inspired pursuits in contemporary engineering endeavors (Harvey et al. 2022). The manifestation of this inspiration is most apparent in the complexities of avian appendages, and wonders of aerodynamic principles whose teachings have propelled noteworthy advancements in aeronautics and sustainable power sources (Kumah et al. 2023) and hold the potential to impact the emerging realms of unmanned aerial vehicles (185) and individualized airborne transportation (Lin et al., 2014).

Bird wings, with their remarkable assortment and adaptability, epitomize the pinnacle of aerodynamic efficacy. Arising from ceaseless evolutionary refinement, every wing embodies an exquisite resolution to the trials of its ecological domain, deftly harmonizing the conflicting requisites of generating lift and minimizing drag (Sarucan et al. 2023). The wings, in their splendid display, possess a notable camber—an asymmetrical configuration with a greater thickness at the forefront and a graceful tapering towards the rear. This ingenious structure adeptly modulates the dispersion of air pressure, thereby establishing a differential that engenders lift, the fundamental force that facilitates the phenomenon of flight (Lu et al. 2022).

Further enhancing lift generation, bird wings incorporate a remarkable design feature: a gentle twist known as ‘washout’. In the realm of aeronautics, the washout, which stretches from the root to the tip of the wing, serves the purpose of upholding a uniform lift throughout the expanse of the wing. This crucial attribute bestows stability and safeguards against the treacherous phenomenon known as stalling (Reynolds et al. 2017). In addition to these fixed structures, birds possess the remarkable capability to dynamically alter the shape of their wings in response to changing aerodynamic circumstances, a phenomenon referred to as morphing (Bishay et al. 2023). Similar to the ailerons found on the wing of an aeroplane, birds possess the ability to modify their wing shape and surface area. This enables them to enhance the ratio of lift to drag, thereby ensuring efficient flight even when faced with turbulent circumstances (Zhang et al. 2024).

However, the attainment of flight requires more than simply generating lift; it necessitates the simultaneous diminishment of drag, the opposing force that impedes forward motion (Traub et al. 2023). Birds experience two fundamental forms of drag: parasitic drag, which emerges from the presence of friction and turbulence (Zheng et al. 2023a, b), and induced drag, which is associated with the creation of lift (Nan et al. 2020). The avian creatures possess a sleek anatomical structure, which, when coupled with their remarkable capacity to alter the shape of their wings, effectively mitigates the adverse effects of said forces (Feraru et al. 2023). Through the manipulation of their wings’ geometry, birds possess the remarkable ability to optimize their lift-to-drag ratios, thereby establishing a formidable standard of aerodynamic efficiency for human-engineered flight apparatus.

The fundamental principles of avian flight, complete with intricate adaptations for generating lift and minimizing drag, have exerted a profound influence on the domains of mechanical and aerospace engineering (Majdy 2023). In the realm of aircraft design, the integration of these bio-inspired strategies into the wing designs of contemporary aeroplanes has emerged as a prominent application (Vukobratović et al. 2012. The emergence of variable camber wings and winglets, which draw inspiration from the elevated tips of soaring avian creatures, has facilitated noteworthy enhancements in both fuel efficiency and range (Swargam et al. 2022). In a similar vein, the realm of renewable energy has experienced significant advantages owing to innovations inspired by avian influences. Wind turbines, fashioned to emulate the aerodynamic characteristics of avian appendages, exhibit heightened efficacy in the realm of energy acquisition, as they adeptly seize energy with greater efficiency and alleviate the mechanical strain upon their frameworks, even when confronted with feeble gusts (Zhang et al. 2021).

In contemplating the future of bio-inspired design, one can envisage the progression of unmanned aerial vehicles and individual airborne contrivances. With the escalating dependence on unmanned aerial vehicles for a diverse array of purposes, spanning from aerial photography to delivery services, the integration of avian-inspired principles possesses the potential to significantly enhance their flight efficiency, stability, and maneuverability (Haruna et al. 2023). The epoch of individual aerial transportation, traversing the domain of speculative literature to actuality, may also bear witness to profound metamorphoses via aerodynamics inspired by biological processes, propelling the genesis of secure, proficient, and ecologically conscious personal airborne contrivances (Ukamaka et al. 2023).

While the magnitude of these physical adaptations cannot be overemphasized, they epitomize a more comprehensive alteration in our design philosophy (Song et al. 2023). Our relentless quest for bio-inspiration signifies a shift from stationary, inflexible formations towards pliable, adaptable systems that promptly react to ever-changing environmental dynamics, mirroring the adaptive prowess that avian creatures have refined over countless millennia. This paradigm shift presents an assortment of captivating challenges and opportunities, necessitating progressions in material science (Saleh et al., 2017), manufacturing processes (Abas et al. 2022) control systems (Akram et al. 2021), and beyond.

The examination of avian-inspired configurations stands as a testament to the unparalleled engineering aptitude of the natural world, proffering teachings that we are merely commencing to comprehend and employ (Shengjie et al. 2023). The revelations procured from the exquisite equilibrium of structure and utility in avian appendages have already permeated an array of pragmatic implementations, bestowing noteworthy enhancements in efficacy and prowess. In our relentless pursuit of unravelling the enigmas of avian locomotion, we persist in upholding a time-honoured legacy of emulating nature’s design, a practice that traces its origins to the nascent stages of human ingenuity.

Case 2: butterfly wing-inspired color creation

In our ceaseless pursuit to comprehend and replicate the brilliance enshrined within the intricate designs of nature, scientists have embarked upon a voyage that surpasses conventional boundaries of knowledge. An enthralling manifestation of this interdisciplinary pursuit is the investigation into the iridescent wings of the morpho butterfly (Chen et al. 2018; Li et al. 2016), which has provided invaluable elucidation regarding an extraordinary process for the generation of colors. By virtue of the exquisite amalgamation of biology, physics, and materials science, the fundamental tenets underpinning this bio-inspired design are propelling pioneering advancements across a spectrum of domains, encompassing anti-counterfeit technology and the fabrication of energy-efficient, chromatic materials (Goel et al. 2023).

Upon initial observation, one cannot help but be captivated by the resplendent azure wings of Morpho butterflies, a spectacle that is rendered even more extraordinary due to the absence of pigments in the creation of this mesmerising exhibition. The butterfly wing scales possess a distinctive arrangement, thereby giving birth to what scientists commonly denote as ‘structural coloration’ (Abas et al. 2022).

The phrase ‘structural coloration’ is employed to delineate hues that arise from micro and nano-structured surfaces that deftly manipulate light, as opposed to those engendered by chemical pigments. This extraordinary characteristic is evident in the scales of Morpho butterfly wings, which consist of a complex arrangement of nano-scale formations composed of alternating layers of cuticle and air (Lee et al. 2015). The cuticle layers, which consist of chitin, a polysaccharide with long chains, and air layers, collectively create a lattice-like structure with multiple layers.

The lattice in question exhibits a meticulous arrangement, resembling tree-like structures with branches that are adorned with cuticles and interspersed with air. This results in a recurring pattern spanning hundreds of nanometers. The spatial scale in question bears resemblance to the wavelengths of visible light, spanning from roughly 400 nm (violet) to 700 nm (red) (ang et al., 2011). Consequently, the configuration engages in a reciprocal manner with the incident electromagnetic radiation, thereby giving rise to the observable occurrence commonly referred to as ‘multilayer interference.’

The light waves that impinge upon the wings of the butterfly undergo multiple reflections at each interface between the air and the cuticle. Due to the meticulous configuration and size of the nanostructures, only specific wavelengths engage in constructive interference, resulting in amplified reflections. In the instance of the Morpho butterfly, these formations are meticulously calibrated to harmoniously interact with blue light, thus bestowing upon the wings their remarkable azure manifestation (Niu et al. 2015).

This process, while captivating in its nature, can be comprehended by means of the principles of wave interference and diffraction. When the light of diverse wavelengths encounters the multi-layer structure, distinct wavelengths experience varying phase shifts, resulting in either constructive or destructive interference. The wavelengths that experience constructive interference are those that intersect with our ocular organs, thereby engendering the perceived chromaticity. In the instance of Morpho butterflies, the layered configuration is such that blue light encounters constructive interference.

In terms of practical applications, the mechanism of structural coloration, drawing inspiration from the intricate scales of butterfly wings, has indeed opened doors to numerous technological innovations. In the domain of security, for instance, it has been utilized to formulate measures against counterfeit endeavors. By integrating substances that manifest structural chromaticity into currencies, credit cards, or passports, the intricacy of duplicating said articles experience a substantial augmentation (Shatnawi et al. 2021). Replicating such features presents a formidable challenge, thereby augmenting the security of these crucial documents.

In the realm of consumer electronics, the distinctive attributes of structural color are making their ingress into display technologies. Through the endeavor of crafting structures that emulate the wing scales of the Morpho butterfly, scientists are presently engrossed in the creation of screens that possess the ability to generate vivid hues devoid of the customary employment of conventional pigments or backlighting. The intrinsic efficacy of these mechanisms for generating colors, which exclusively depend on the manipulation of light, may considerably diminish the energy consumption of electronic displays, thereby paving the way for a more sustainable trajectory in future technological progress (Schenk et al. 2020).

Gazing into the vast expanse of time that lies ahead, the boundless possibilities of structural color manifest themselves in even more profound ways. One particularly exhilarating prospect entails the advancement of energy-efficient, color-altering materials. Through the creation of structures possessing the ability to modify their properties dynamically, scientists possess the potential to conceive materials that undergo alterations in color as a direct response to external stimuli. A system of this nature possesses the potential to be applied across diverse domains, ranging from intelligent adaptive concealment to dynamic, energy-conscious architectural concepts (Zheng et al. 2020a, b).

Case 3: bat echolocation-inspired sensors

Throughout the vast expanse of time, nature has meticulously crafted intricate systems that showcase remarkable intricacy and efficacy, serving as a perpetual wellspring of inspiration for the scientific community. One such captivating phenomenon is the bat’s echolocation, a sophisticated biological sonar employed by these nocturnal aviators to navigate through darkness and capture prey. The bat’s echolocation system functions by emitting a sequence of high-frequency sound waves, which subsequently rebound off objects obstructing their trajectory and ultimately return to the bat (Dong et al. 2013). This process empowers the bat to construct a precise auditory representation of its surroundings. This extraordinary biological phenomenon, showcasing remarkable precision in sensing, serves as the foundation for a burgeoning and innovative realm of bio-inspired sensor technology (Osamy et al. 2022).

Bats, in their remarkable nature, emit ultrasonic waves that typically span from 20 kilohertz to 200 kHz, a frequency spectrum that lies well beyond the auditory capacity of the human species (He et al. 2015). Every call possesses distinctiveness, encompassing its frequency, duration, and intensity, meticulously tailored to the bat’s surroundings and the particular undertaking at hand. For example, bats emit shorter signals that are frequency-modulated (FM) for detecting objects in close proximity and longer signals that have a constant frequency (CF) for navigating over longer distances (Baerwald et al. 2016). The echoes that return are subsequently received and processed in order to extract valuable spatial and velocity information pertaining to the objects in the vicinity. The sonic perception is In addition amplified by the Doppler shift (Raw et al. 2018), as the alteration in the echo frequency aids bats in assessing the speed and orientation of their quarry.

The fundamental tenets of echolocation present a captivating resolution to numerous technological quandaries we presently encounter, chiefly within the domain of perception and traversal. These bio-inspired sensors are being integrated into sonar systems and autonomous vehicles, serving as their ‘ocular organs’ in environments where visual cues are limited or non-existent. Submarine sonar systems, for instance, have harnessed this concept in order to perceive and ascertain the presence and whereabouts of objects submerged beneath the water’s surface. In a similar vein, autonomous vehicles make use of Lidar sensors that imitate the echolocation abilities of bats (Sumiya et al. 2017). These sensors emit light waves in pulses and then calculate the time it takes for these waves to return after encountering objects in close proximity. This process allows for the accurate identification of obstacles and the assurance of secure navigation.

The construction of bat-inspired sensors necessitates the convergence of knowledge encompassing acoustics, materials science, signal processing, and evolutionary biology. The fabrication of ultrasonic transducers that possess the ability to emit and receive high-frequency sound waves presents a central challenge. Feasible options have arisen in the form of advanced materials, such as piezoelectric ceramics and composites, which exhibit the capacity to convert electrical energy into mechanical vibrations and vice versa. In conjunction with pioneering micro-manufacturing methodologies, these substances are being shaped into arrays of transducers, emulating the intricate facial structure of bats that is specifically engineered to govern the propagation of sound (Zhang et al. 2017).

Signal processing, in its profound essence, assumes a paramount role in the extraction of significant insights from the reverberations of sound. In its essence, the subject matter concerns the emulation of the bat’s remarkably specialized auditory system. This system adeptly interprets the temporal delay, frequency alteration, and amplitude fluctuation within the echoed signals it receives, thereby constructing an intricate and comprehensive 3D representation (Luo et al. 2018). These concepts are implemented through sophisticated algorithms, encompassing the principles of Fourier analysis, cross-correlation, and machine learning (Kar 2016).

Moreover, comprehending the evolutionary biology of diverse bat species provides profound insights into the optimization of echolocation strategies. Bats, in their evolutionary journey, have developed diverse sonar beam patterns, rates of pulse emission, and frequency modulations to effectively adjust to distinct environments and hunting strategies (Kounitsky et al. 2015). The translation of these natural strategies into sensor design has the potential to provide groundbreaking solutions for a wide range of applications, surpassing existing implementations.

In the realm of progress, sensors inspired by bat echolocation possess the capacity to transform navigation systems (Templos-Santos et al. 2019) fundamentally. As the global sphere of influence expands, the necessity for enhanced, dependable, and adaptable navigational instruments escalates. Here, the incorporation of sensors inspired by bats could potentially provide improved spatial resolution, dynamic range, and adaptability to diverse environmental conditions. This has the potential to give rise to the advancement of navigation systems that possess the ability to operate flawlessly in both heavily populated urban regions and unexplored wilderness, conceivably even in unfavourable meteorological circumstances (Cao et al. 2015).

In the distant future, this technology inspired by biology may permeate our everyday existence by seamlessly merging with intelligent household systems. Bat-inspired sensors have the potential to be devised for the purpose of monitoring and regulating domestic surroundings (Ortiz-Baez et al. 2023). These sensors could encompass a range of functionalities, including the ability to detect and monitor movements for security reasons, as well as the capacity to modulate lighting and temperature based on occupancy levels. These applications possess the potential to significantly enhance the energy efficiency of residences, simultaneously augmenting comfort and convenience (Wu et al. 2022).

Case 4: dragonfly wing-inspired microbial resistance

The intricate dance between biology and engineering still astonishes the scientific community, bestowing a profound impact on our comprehension and, in due course, our application of materials and designs (Skrzydeł et al. 2021). The diverse array of life forms, honed through countless ages of evolution, present a bountiful repository of tactics that may be harnessed to surmount intricate quandaries faced by humanity. The dragonfly, an exquisite wonder of nature, has captivated scientists worldwide. The dragonfly, with its wings possessing the key to innate microbial resistance, presents an extraordinary paradigm for the pursuit of biomimetic investigation (Nguyen et al. 2014).

Dragonfly wings, in addition to being remarkable displays of natural aviation, possess a distinctive microscale nano-pillared composition that offers an intriguing means of microbial resilience. The wings of a dragonfly, adorned with nanostructures resembling pillars measuring approximately 200 nm in height and 100 nm in diameter, have been observed to mechanically pierce and dismantle diverse bacterial and fungal cells. This mechanism possesses a distinctiveness, for it does not depend on chemical or immune reactions but solely on the physical configuration of the wing’s surface, thereby rendering it a natural and enduring antimicrobial tactic.

The nanostructured wing surface of the dragonfly manifests a captivating interplay between the elevated surface area and acute nano-protrusions. This greatly amplifies the wing’s contact interaction with microbial cells, resulting in physical rupture and subsequent microbial demise, all while avoiding the promotion of resistance. Considering the mounting apprehensions pertaining to antimicrobial resistance, the profound fascination lies within this mechanized approach to bacterial annihilation. In stark contrast to traditional antimicrobial methodologies, this approach abstains from the utilization of chemicals that may potentially induce resistance or inflict harm upon the environment (Tang et al. 2021).

In view of the remarkable inherent microbial resistance exhibited by the wing of the dragonfly, the scientific community has endeavored to emulate these structures artificially. The present applications revolve predominantly around medical apparatus and hygienic surfaces. Hospitals, which are perpetually confronted with the peril of infection dissemination (Werner et al. 2023), derive immense advantages from these biomimetic innovations. Surfaces emulating the nano-pillar configuration of dragonfly wings possess the capacity to efficiently diminish the microbial burden, consequently mitigating the peril associated with nosocomial infections. This application possesses a promising potential not solely in upholding hygiene standards but also in greatly enhancing patient outcomes (Zheng et al. 2023a, b).

The transmutation of surfaces inspired by dragonflies into sanitary applications also extends to the day-to-day objects with which we regularly engage. Door handles, countertops, bathroom fittings—surfaces that frequently encounter humans and are notorious for being ‘high-touch’ areas—can also be seamlessly incorporated with this biomimetic technology (Birkett et al. 2022). By endowing these commonplace entities with dragonfly-inspired microbial resilience, we can engender a safer, more sanitary milieu, thereby mitigating the proliferation of contagious ailments.

While the present applications remain predominantly restricted to the domains of healthcare and sanitation, the untapped potential inherent in dragonfly-inspired surfaces that exhibit resistance to microbial agents is yet to be fully actualized. Future implementations, as postulated, propose a significant role within the realm of public health infrastructure and the interiors of space stations. In the realm of public health, urban environments such as public transportation, recreational facilities, educational establishments, and public restrooms serve as focal points for the dissemination of microorganisms (Godfroid et al. 2017). By employing surfaces inspired by the wings of dragonflies in such areas, the transmission of infectious diseases could be considerably alleviated.

In the realm of space stations, where conditions are rigorous and sequestered, the preservation of sanitary measures assumes paramount significance. Surfaces emulating the wings of the dragonfly may be utilized within the confines of spacecraft interiors to organically counteract the proliferation and dissemination of microorganisms, thereby furnishing a more secure and hygienic milieu for astronauts (Yang et al. 2022). Furthermore, the resilient and self-cleansing characteristics of these surfaces would also diminish the necessity for maintenance endeavors and enhance the durability of the spacecraft’s interiors.

The prospect of dragonfly wing-inspired materials fundamentally reshaping our approach to combatting microbial transmission is indeed exhilarating (Adak et al. 2024; Sun et al. 2021). Nevertheless, the odyssey of comprehending this innate occurrence and effectively executing it is riddled with myriad scientific and technical obstacles. The challenges encompassed in this endeavor include the development of a manufacturing process capable of faithfully reproducing the distinctive nano-pillar structures on a grand scale, guaranteeing the robustness of the created surfaces, and acquiring regulatory endorsements for the utilization of these materials across diverse domains (Windley et al. 2020).

However, the undeniable allure lies in the prospective benefits that can be derived from the utilization of this biomimetic approach. In a world that is progressively contending with the peril of infectious maladies and mounting antibiotic resistance, acquiring knowledge from the dragonfly may bestow upon us an efficacious and enduring resolution (Aerodynamic performance of a dragonfly-inspired tandem wing 2022; Santos et al. 2021). As we persist in unravelling the enigmas of nature, we gradually approach a time when human ingenuity harmoniously merges with the sagacity of the natural world, resulting in revolutionary resolutions that not only address our predicaments but also safeguard the welfare of our planet.

Case 5: bee hive-inspired thermal regulation

In the vibrant mosaic of natural wonders, the marvels of bee hives, and complex labyrinthine structures, thinkers, philosophers, and scientists alike have been intrigued. As we forge ahead in the quest for sustainable living and energy conservation, the inspiration drawn from these meticulous architects of the animal kingdom offers a remarkable framework (Windley et al. 2020). Central to our intrigue is a singular yet pivotal, phenomenon intricately woven into the hive’s design—thermoregulation. This adaptive mechanism, which keeps the hive’s temperature within a remarkably stable range irrespective of external conditions, embodies the potential to redefine our approach to energy-efficient design in the realm of architecture and urban planning (Ononye et al. 2023). Hive thermoregulation stands as a testament to the intricate balance bees have struck between biology and physics to survive and thrive in various climates. This thermal regulation results from the hive’s hexagonal matrix design, the bees’ collective behavior, and the material properties of beeswax (Blažková et al. 2022). The hexagonal architecture allows for optimal spatial utilization and structural stability. Coupled with the behavior of worker bees, who collectively fan or cluster to cool or warm the hive respectively, a precise regulation of temperature is achieved. In addition, beeswax, a complex mixture of hydrocarbons, esters, and fatty acids, exhibits an impressive heat capacity of approximately 2.6 J/g °C, ensuring that the hive’s structure effectively absorbs and releases thermal energy, maintaining the hive’s temperature within a narrow range of 32–35 °C (Al-Shehri et al. 2022).

In engineering terms, this biologic phenomenon is a superb example of passive thermal regulation, a strategy that uses the environment’s energy fluxes and a building’s own thermal mass to maintain temperature stability. Unlike active systems which rely heavily on energy-intensive mechanical and electrical systems, passive systems stand out for their energy efficiency and sustainable operation (Du et al. 2016).

This inspiring and sustainable thermoregulatory strategy has been embraced by contemporary architects and engineers in the design of energy-efficient buildings, the need for which has never been greater. With the built environment accounting for about 40% of global energy use, biomimetic, energy-efficient building designs derived from bee hives are gaining increasing relevance (Imani et al. 2020). The concept of "Green Building" design, driven by principles of energy conservation, sustainability, and minimal environmental impact, draws upon the hive’s structure and function in more ways than one. For instance, buildings that emulate the thermal regulation strategy of bee hives often integrate materials with high thermal inertia and deploy design elements that maximize energy absorption and release. These structures also include large ventilation shafts and other features that facilitate the passive movement of air, replicating the role of worker bees. The combination of these strategies results in significant energy savings by reducing reliance on artificial heating and cooling systems (Clair et al. 2022).

Looking to the future, the potential of hive-inspired thermoregulation extends far beyond individual buildings. At the city scale, it could offer a paradigm shift towards “Energy-efficient Cities,” where buildings, public spaces, and infrastructure are designed to work collectively in harmony with their natural surroundings, just as a hive operates in equilibrium with its environment. These cities would minimize energy use, maximize the use of renewable energy, and foster resilience to climate change, contributing significantly to global sustainability goals.

Furthermore, as our aspirations extend beyond Earth to include the colonization of other planets and moons, the hive’s thermoregulation system offers valuable insights for designing habitats in extraterrestrial environments (Abou-Shaara et al. 2013). Given the extreme temperature variations on celestial bodies like Mars, maintaining stable internal temperatures will be a significant challenge. Extraterrestrial habitats that draw inspiration from bee hives could effectively leverage local energy sources to maintain thermal stability, just as bee hives do here on Earth.

Overcoming limitations and future directions

Current limitations in bio-inspired design

The fascination with nature’s boundless diversity and its sophisticated designs has been a source of inspiration across millennia, leading to the emergence of biomimicry. This discipline endeavors to harness the principles behind nature’s time-tested designs for human benefit. However, the path to integrating these designs into practical applications is fraught with complex challenges that demand in-depth exploration and innovative solutions (Dharmdas et al. 2023; Tajammul et al. 2024; Patil et al. 2024).

At the heart of bio-inspired design lies the challenge of deciphering and replicating the complexity inherent in natural systems (Qin et al. 2023; Tajammul et al. 2024). These systems, shaped by the relentless forces of evolution, display a degree of sophistication and functionality that often surpasses our current technological capabilities. For instance, the structural complexity of a leaf is not merely its green facade but encompasses a highly efficient mechanism for energy conversion. This is achieved through an elaborate network of cells, intricate vascular structures, and specialized organelles, each contributing to the plant’s photosynthesis process. Similarly, the hierarchical structure of a seashell, which ranges from macroscopic to microscopic levels, is a product of a finely tuned biomineralization process (Zhu et al.,2020). These examples underscore the significant gap between our understanding and our ability to replicate such complex biologic systems. Potential applications in this domain include the development of more efficient solar cells inspired by the photosynthetic process of leaves, and advanced materials with the structural resilience of seashells for construction and aerospace industries.

Material constraints represent another critical hurdle in bio-inspired design. Nature utilizes materials with exceptional properties that are difficult to mimic with synthetic alternatives. Spider silk, for example, is renowned for its strength and flexibility, derived from a unique arrangement of protein molecules. Its tensile strength rivals that of high-quality alloy steel, while its elasticity allows it to stretch significantly without breaking (Whittall et al. 2024). These properties make spider silk an ideal model for developing advanced materials for use in bulletproof vests, medical sutures, and lightweight, durable ropes. However, the challenge lies in our limited understanding of the molecular processes involved in its production and the difficulty in synthesizing these proteins artificially (Miserez et al. 2023). Overcoming these material constraints requires innovative approaches in molecular biology and materials science to unlock new possibilities in manufacturing and engineering.

The challenge of scaling is particularly pertinent in the realm of bio-inspired design. Many natural mechanisms operate effectively at micro or nanoscales, presenting significant obstacles when attempting to scale these processes for human use. The phenomenon of structural coloration, as seen in peafowls and butterflies, results from the interaction of light with nanostructured surfaces. While replicable in laboratory settings, scaling this process to produce structurally colored materials on an industrial scale poses substantial challenges. Similarly, biologic materials like bone or nacre exhibit exceptional mechanical properties at the microscopic level, thanks to their complex, layered structures. Translating these properties to materials that can be produced and used on a larger scale involves overcoming significant technical barriers (Tabrizian et al. 2023). Applications in this domain could revolutionize industries such as coatings, where structural coloration could provide environmentally friendly, durable pigments, and materials engineering, where the replication of bone or nacre’s mechanical properties could lead to breakthroughs in lightweight, high-strength materials (Sathesh et al. 2023).

Ethical and environmental considerations are paramount in the pursuit of bio-inspired designs. The extraction and use of biologic materials raise ethical questions, particularly when it involves animal products. The fashion industry’s shift from real to faux fur is a response to such ethical concerns, yet these synthetic alternatives often rely heavily on petrochemicals, posing significant environmental challenges (Zahira et al. 2023). The quest for sustainable materials inspired by the adhesive properties of gecko feet or the hydrophobic surface of lotus leaves must therefore be mindful of the ecological footprint of the manufacturing processes involved. This necessitates a holistic approach to material development, considering the lifecycle impact from extraction to disposal, to ensure that bio-inspired innovations do not inadvertently harm the environment they seek to emulate. Applications that address these concerns could lead to the development of eco-friendly adhesives, water-repellent surfaces, and other materials that mimic nature’s functionality without compromising ethical or environmental standards.

Finally, the financial implications of research, development, and manufacturing in the realm of bio-inspired materials cannot be understated. The creation of materials and mechanisms that mimic nature’s designs often requires cutting-edge technology, extensive research, and specialized expertise, all of which entail significant investment. Scaling up production to meet commercial demand further amplifies these costs, making the financial viability of bio-inspired projects a critical consideration. Despite these challenges, the potential rewards in terms of innovation, sustainability, and new market opportunities are substantial. Success in this field could lead to breakthroughs in a wide range of applications, from sustainable construction materials and energy-efficient designs to advanced medical devices and environmentally friendly consumer products (Kreczmańska-Gigol et al. 2022).

In summary, the journey toward realizing the potential of bio-inspired design is complex and multifaceted, involving intricate challenges in understanding and replicating the complexity of natural systems, overcoming material constraints, addressing scale challenges, and navigating ethical and environmental considerations. Each of these areas offers a rich vein of potential applications that, if successfully developed, could lead to significant advancements across multiple industries. The pursuit of biomimetic innovation, therefore, requires not only a deep understanding of biology and engineering but also a commitment to interdisciplinary collaboration, sustainability, and ethical responsibility.

Current trends and possible solutions

The dawn of the twenty-first century heralded a seismic shift in the scientific landscape, one that would irrevocably alter our approach to innovation and discovery. This era is distinguished by a marked increase in interdisciplinary collaborations, signalling a move towards a more integrated scientific methodology. Such collaborations have fostered a new trend: the fusion of diverse scientific fields to decode the complexities of nature’s architecture. In this modern context, the ethos of collaboration lays the groundwork for the burgeoning field of bio-inspired designs and biomimicry. Here, experts from a wide array of disciplines, including biology, engineering, physics, and materials science, converge to push beyond the boundaries of traditional scientific investigation. This synthesis not only bridges gaps between disparate fields but also cultivates a fertile ground for innovation, paving the way for groundbreaking advancements in understanding and replicating the intricate designs found in nature.

The importance of interdisciplinary collaboration cannot be overstated in the realm of bio-inspired design. By leveraging the collective expertise of diverse scientific domains, we gain access to a rich tapestry of insights into the workings of natural systems (Snell-Rood et al. 2023). This collaborative approach allows for a more nuanced understanding of biologic complexities, from the macro-scale orchestration of structures to the micro-level assembly of components. For instance, mechanical engineers contribute their expertise in deciphering the structural and functional aspects of natural systems, drawing inspiration from nature’s proficiency in optimizing structures and conserving energy (Taleghani et al. 2023). This deep dive into nature’s design principles enables the development of materials and structures that mimic the efficiency and functionality of their biologic counterparts. Meanwhile, material scientists explore the molecular makeup of natural materials, analysing their properties to create or enhance synthetic analogues. Simultaneously, biologists and physicists unravel the underlying principles that guide these systems, including evolutionary strategies and the physical laws that shape their form and function. This collaborative venture offers a panoramic view of biologic systems, enriching our capacity to innovate by integrating diverse scientific perspectives.

The advent of advanced manufacturing technologies, such as additive manufacturing (3D printing) and nanotechnology has significantly broadened our ability to replicate complex natural formations with unparalleled precision. Additive manufacturing has revolutionized the way we approach the creation of bio-inspired designs, enabling the production of structures with complex geometries and internal configurations previously beyond the reach of traditional manufacturing methods (Luo et al. 2023). This technology allows for layer-by-layer construction, achieving intricate designs that closely mimic the internal microstructure of natural objects, such as the sophisticated porous arrangement found in bones. This not only enhances the functionality and efficiency of bio-inspired designs but also opens new avenues for medical applications, including bone grafts and replacements. Similarly, nanotechnology offers the capability to create materials with properties that replicate those of natural surfaces, such as the superhydrophobic characteristics of a lotus leaf (Lee et al. 2010). By manipulating materials at the nanoscale, scientists can design surfaces that self-clean or repel water with high efficiency, showcasing the potential of nanotechnology in bringing biomimetic designs to life.

The exponential growth in computational power and the development of advanced algorithms have further enabled the accurate modelling and simulation of complex natural systems. These computational tools facilitate the design, simulation, and optimization of biomimetic models, allowing us to replicate the functionality and efficiency of natural systems with high fidelity. For example, the simulation of avian locomotion, with its intricate aerodynamic features and wing-flapping mechanics, demonstrates the potential of computational tools to optimize designs inspired by nature. By understanding the principles of avian aerodynamics, engineers can develop aircraft that exhibit improved efficiency and manoeuvrability, drawing inspiration from the natural world’s most adept fliers, such as the Peregrine Falcon (Ponitz et al., 2014). This approach not only enhances the performance of engineered systems but also fosters innovation in aerospace design, leveraging nature’s designs to inform and inspire our technological advancements.

In the face of burgeoning environmental challenges, the principles of sustainable and ethical design have become increasingly integral to the engineering process. The recognition of humanity’s impact on the planet has underscored the necessity of adopting a holistic view of product lifecycle management, from the sourcing of materials to the disposal of products. The cradle-to-grave approach emphasizes the reduction of environmental footprints, advocating for the use of sustainable materials and the implementation of energy-efficient manufacturing processes. One notable example of sustainable design is the exploration of spider silk as a lightweight, high-strength alternative to synthetic fibers. The potential for producing spider silk proteins through genetic engineering presents an environmentally friendly option that could replace petroleum-based fibers. However, this approach also highlights the ethical considerations inherent in bio-inspired design, including the impact on biodiversity and the risks associated with genetic modifications. The journey towards bio-inspired designs illuminates a future where collaboration, innovation, and responsibility converge, offering a path towards a sustainable and adaptable world that harmonizes human ingenuity with the wisdom of nature’s designs.

Future directions

As we fixate our gaze upon the expanse of scientific and technological progress, the forthcoming era of bio-inspired designs materializes as a luminous symbol of vast potential. The foundational pillars that shall shape this exciting future encompass advancements in our comprehension of biologic systems, the emergence of novel materials, the escalating complexity of computational models, and an ever-growing emphasis on sustainability (Wegst et al. 2014). As scientists spanning various disciplines such as mechanical engineering, materials science, manufacturing, chemistry, physics, evolutionary biology, aeronautical engineering, acoustics, optics, and more, we embark upon a journey into this audacious realm. We seek to unravel the boundless possibilities presented by bio-inspired designs and their profound ramifications for our forthcoming days.

A more profound comprehension of biologic systems resides at the forefront of forthcoming advancements in bio-inspired designs. The intricacy of the natural world, painstakingly refined throughout countless aeons, presents an apparently boundless reservoir of inspiration (Pointz et al. 2014). Nature, with its resilient and durable seashell structures, as well as the flawlessly designed wings of owls that possess impeccable acoustics, has ingeniously crafted solutions to the very obstacles that humanity still struggles to overcome. Advancements in fields such as genomics, proteomics, and cellular biology are swiftly enhancing our comprehension of these natural systems. Advancements in DNA sequencing technology have rendered it feasible to sequence the complete genome of an organism, thereby endowing us with intricate insights into the coding and manifestation of specific traits and characteristics. A profound understanding of the genetic code of living beings, combined with continuous progress in the field of evolutionary biology, would greatly amplify our capacity to perceive and reproduce natural patterns with utmost accuracy.

In parallel, the relentless march of progress within the domain of materials science presents an additional dimension to the prospects of bio-inspired designs. The genesis and honing of novel substances that faithfully emulate the architectural, kinetic, and utilitarian attributes of organic materials is no longer confined to the domain of speculative literature (Zhu et al. 2018). For instance, bio-mimetic materials such as graphene possess a tensile strength surpassing 130 GigaPascals (GPa) and a density merely amounting to 2.26 g per cubic centimetre (Kim et al. 2015). These materials present remarkable strength-to-weight ratios that greatly surpass those observed in conventional engineering materials. These novel materials, with their remarkable amalgamation of toughness, flexibility, lightness, and durability, shall serve as the fundamental framework for forthcoming bio-inspired designs, encompassing impact-resistant equipment and resilient aerospace structures that are exceptionally lightweight (Ron et al. 2019).

The incorporation of sophisticated computational models and algorithms within the domain of bio-inspired design is an arena experiencing swift expansion and vast potential. As computational power escalates to unprecedented heights, our capacity to simulate, model, and forecast intricate natural systems and processes also advances accordingly (Xing et al. 2021). Bio-inspired computational models possess the potential to unravel and imitate intricate biologic structures, such as the fractal patterns present in snowflakes or the hydrodynamic form of a shark (Zhao et al. 2016). This capability enables us to fabricate superior and more effective designs. For instance, the utilization of intricate fluid dynamics simulations, which possess the capability to precisely simulate the movement of water across the epidermis of a shark, may potentially facilitate the development of swifter and more proficient submarines and aquatic robots (Wei et al. 2021).

In conclusion, the incorporation of sustainability into the very essence of bio-inspired design is not merely a lofty ambition, but a necessity compelled by the intensifying climate emergency. The principles of biomimicry offer a pathway to the engineering of systems that possess not only exceptional performance but also a profound sense of harmony with the natural realm. For instance, the design of solar cells, inspired by the light-harvesting properties exhibited by photosynthetic organisms (Tao et al. 2020), has the potential to enhance energy capture efficiency. Furthermore, the utilization of bio-degradable materials, drawing inspiration from natural compounds such as chitin and cellulose, possesses the potential to supplant numerous non-degradable synthetic materials presently employed, thereby mitigating our ecological impact. In the manufacturing industry, the incorporation of nature-inspired methodologies, like additive manufacturing, which emulate the incremental development witnessed in natural phenomena, may yield substantial diminishments in the generation of waste (Lin et al. 2022). The incorporation of these bio-inspired tactics across diverse sectors holds great potential in lessening the ecological consequences of human actions, thereby emphasizing the potential of biomimicry in propelling sustainable advancement.

As we direct our attention towards the forthcoming era, we envisage a realm wherein the demarcations between the innate and the contrived become indistinct and wherein our innovations are not solely derived from, but rather augmentations of, the natural realm. By amalgamating diverse scientific disciplines (Patil et al. 2023), each offering a pivotal fragment to the enigma, we find ourselves on the cusp of a paradigm shift in our methodology towards design and manufacturing (Mostafa et al. 2021). This convergence shall unite performance and sustainability in unparalleled manners. In this forthcoming era, wherein we assimilate and execute the sagacity of nature, it bestows upon us not solely a trajectory towards advanced technology, but rather a thoroughfare towards a more concordant cohabitation with our surroundings, serving as a testament to the everlasting brilliance of nature. It is a future that we anticipate with a profound sense of optimism and curiosity, eagerly awaiting the unveiling of the subsequent chapter in the chronicles of human innovation.

Conclusions

Our voyage through scientific exploration has always been underpinned by a relentless curiosity. This natural inclination has propelled us towards the secrets embedded within the natural world, revealing a treasure trove of design insights.

Bio-inspired configurations represent more than mere mimicry of nature. This interdisciplinary approach combines principles from biology, physics, materials science, and engineering, aiming to harness nature’s vast wisdom honed over millennia. Consider the bamboo: its hierarchical arrangement boasts Young’s modulus ranging between 20 to 30 GPa, coupled with an impressive tensile strength of up to 400 MPa. Such properties present a beacon for the development of lightweight yet remarkably robust materials. Similarly, the hydrodynamic brilliance of sharks, thanks to their dermal denticles, can reduce drag by up to 8%, offering a masterclass in fluid dynamics optimization. The realm of avionics, too, has much to glean from nature. Bird feathers, for instance, withstand tensile stresses of 100 MPa, balancing lightweight properties with resilience, setting a precedent for future material innovation. But our voyage is not without its challenges. Nature’s prowess often lies in its intricate micro- and nanostructures, areas where our current manufacturing capabilities sometimes falter. Furthermore, the multifunctionality observed in biologic systems, where a single entity often juggles multiple roles, is a design challenge we grapple with. Yet, the horizon is bright. Advancements in fields like nanotechnology, additive manufacturing, and artificial intelligence promise to bridge these gaps. Such technologies hold the key to unlocking the potential of bio-inspired designs, spanning diverse domains from aeronautics to medicine.

To conclude, our endeavor into the realm of bio-inspired design is a testament to human adaptability and innovation. We do not just copy nature; we strive to understand its core principles, translate them into our engineering lexicon, and innovate. By doing so, we embark on a journey that seamlessly merges human ingenuity with nature’s masterpieces, fostering a symbiotic future where design sustainability and efficiency are paramount.

Authors contribution

Conceptualization, G.F., A.Y.P; methodology, G.F., A.Y.P; software, G.F., A.Y.P.; validation, G.F., A.Y.P and I.G.S.; formal analysis, G.F., A.Y.P and I.G.S.; investigation, G.F., A.Y.P, R.M. and I.G.S.; resources, G.F., A.Y.P and I.G.S.; data curation, G.F., A.Y.P and I.G.S.; writing—original draft preparation, G.F., A.Y.P and I.G.S.; writing—review and editing, G.F., A.Y.P, R.M. and I.G.S.; visualization, G.F., A.Y.P, R.M. and I.G.S.; supervision, A.Y.P and I.G.S.; project administration, A.Y.P.; funding acquisition, T.M.Y.

Data availability

The data can be accessed upon request.

Declarations

Conflict of interest

The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.