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. 2021 Feb 18;8(8):2004051. doi: 10.1002/advs.202004051

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© 2021 The Authors. Advanced Science published by Wiley‐VCH GmbH

This is an open access article under the terms of the http://creativecommons.org/licenses/by/4.0/ License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

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Fabrication of a light‐sensitive fingerprint LCN coating with invertible topography. A) Chemical structures of azobenzene crosslinker 1; liquid crystal monomers 2, 3, and 5; dichroic dye 4; chiral dopant 6; photoinitiator 7; adhesive polymer 8; and Coumarin fluorescent dye 9. B) Image of a fingerprint LCN as observed by polarized optical microscopy. C) 3D view measured by digital holographic microscopy (DHM) showing topographical inversion. D) 2D topographical profiles of the coating surface demonstrating the topographical inversion when actuated by UV light.