Insulators as forms of printable ink. a) Photograph of printed hexagonal honeycomb structure. b) Photographs of 3D‐printed PCL construct (left), and temporary state to enable inkjet printing on a 2D surface (right). c) Photographs of the 3D‐printed hollow lattice structure (left), and its shape deformation with finger pressing (right). d) Photograph of sensor array on printed TPU substrate. e) Photographs of FRE printed PDMS helix structure (left), and FRE printed PDMS bifurcation embedded in the Carbopol (right). f) Photographs of the self‐healing spiral structure. Inset: Optical micrograph of the surface morphology with a scale bar of 1 mm. g) Schematic illustration of the structure of the film and textile capacitors with printed PVP/PMF dielectric layer. h) Schematic illustration of the bottom‐gate‐top‐contact OFET device structure with printed PVA/PMF gate insulator layers. i) Schematic illustration of the metal‐insulator‐metal capacitor structure with HfO2 dielectric layer. j) Surface profile image of the TFT structure with ZrO2 dielectric layer. k) Schematic illustration of the printed capacitors with the BST/PMMA dielectric layers. l) Microscope image of a printed capacitor with a polymeric composite dielectric layer. a) Reproduced with permission.[
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] Copyright 2021, American Chemical Society. b) Reproduced with permission.[
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] Copyright 2015, Wiley‐VCH. c) Reproduced with permission.[
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] Copyright 2020, American Chemical Society. d) Reproduced with permission.[
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] Copyright 2017, Wiley‐VCH. e) Reproduced with permission.[
83
] Copyright 2016, American Chemical Society. f) Reproduced with permission.[
84
] Copyright 2018, American Chemical Society. g) Reproduced with permission.[
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] Copyright 2021, American Chemical Society. h) Reproduced with permission.[
87
] Copyright 2021, Wiley‐VCH. i) Reproduced with permission.[
88
] Copyright 2016, The Royal Society of Chemistry. j) Reproduced with permission.[
89
] Copyright 2015, Wiley‐VCH. k) Reproduced with permission.[
90
] Copyright 2018, Springer Nature. l) Reproduced with permission.[
91
] Copyright 2020, American Chemical Society.