Fig. 17: LCs on hierarchical microstructures.

a Chemical structure of the photo-responsive LCP containing azobenzene mesogens. b Schematic showing the deformation of the bilayer LLCP-MBW. With the increase of UV intensity, the penetration of incident light gradually increased into the lamellas of the ridges, causing the deformation of microstructures and the gradual increase of the 397 nm reflection peak. c Surface profiles of the LLCP-MBW show the reversible deformation of the scales on the LLCP-MBW upon UV (365 nm, 10 mW cm−2) and visible light (white light from the microscope) irradiations. d The changes of reflectance spectra of LLCP-MBW after 365 nm UV irradiation with different intensities for 10 s and subsequent 530 nm visible light irradiation for 10 s. Reproduced with permission96. Copyright 2019, Wiley-VCH