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. 2021 Jan 30;24(2):102121. doi: 10.1016/j.isci.2021.102121

Figure 3.

Figure 3

The bioinspired non-iridescent structural color design

(A) Schematic illustration of the the amorphous photonic crystals with short-range order.

(B and C) Optical image of Male Eastern Bluebird (Sialia, Turdidae) and SEM image of the channel-type b-keratin and air nanostructure from back contour feather barbs of S. sialis. Reprinted with permission from Dufresne et al. (2009). Copyright 2009, Royal Society of Chemistry.

(D) Illustration of the formation of amorphous colloidal arrays due to a strong downward infiltration flow.

(E) SEM image of a colloidal array prepared on an AAO membrane.

(F) Photographs of inkjet printing SCBE letters at different rotation angles, presenting the angle-independent features. Reprinted with permission from Bai et al. (2018). Copyright 2018, John Wiley & Sons, Inc.

(G) SEM image of the porous surface of the bottlebrush block copolymers microspheres.

(H) An aqueous dispersion of green microspheres inside a flat glass capillary, showing the consistent green color upon rotation of the capillary.

(I) Dried green microspheres on a glass slide, showing the visible green color without any additional refractive index matching. Reprinted with permission from Zhao et al. (2020). Copyright 2020, John Wiley & Sons, Inc.