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. Author manuscript; available in PMC: 2019 Apr 16.
Published in final edited form as: ACS Nano. 2018 Aug 13;12(8):7425–7433. doi: 10.1021/acsnano.8b04379

Figure 1.

Figure 1.

An overview of different hierarchical materials in Nature, and how do they go thorough different assembled structures from the macroscale down to the nanoscale.A. Schematic representation of spider silk hierarchical structure for which silk fibroin is the main component (Figure adapted from Ref. 8).B. Schematic representation of wood hierarchical structure emphasizing the role of cellulose nanocrystals (Figure adapted from Ref. 8).C. Schematic representation of chitin hierarchical structure in the scaffold of crustaceous (Figure adapted from Ref. 8). D. Schematic representation of bone hierarchical structure, with emphasis on hydroxyapatite crystals and collagen protein (Figure adapted from Ref. 2).