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. Author manuscript; available in PMC: 2019 Apr 17.
Published in final edited form as: ACS Sens. 2018 Nov 30;3(12):2475–2491. doi: 10.1021/acssensors.8b01085

Figure 14.

Figure 14.

3D-printed diffraction grating. As the viewing angle changes, the color of the biomimetic butterfly’s wings will change color. (Reprinted with permission from ref 18 Copyright 2017 Wiley).