Figure 5.
The bioinspired dynamic color design
(A–D) Optical photographs (A and C) and TEM images (B and D) of the guanine nanocrystals lattice in the chameleon skin in the relaxed and excited state. Reprinted with permission from Teyssier et al. (2015). Copyright 2015, Springer Nature.
(E and F) Photographs and reflectance spectra of the red color film under various strains (from 0% to 120%).
(G) The peak position of the reflectance spectra (λmax) and the calculated Poisson's ratio as a function of strain for the red-colored photonic elastomer. Inset shows the strain in x and z direction during a stretching process.
(H) Reversible variation of λmax during cycles of extension. Reprinted with permission from Tan et al. (2019). Copyright 2019, John Wiley & Sons, Inc.
(I and J) Schematic illuminates the void formation around the silica particles when stretched and the Photographs of the variation of the composite film at various strains. Reprinted with permission from Ge et al. (2015). Copyright 2015, John Wiley & Sons, Inc.