Fig. 15: Color and surface topography changes achieved by patterning CLC coatings with local swelling properties. | Light: Science & Applications

Fig. 15: Color and surface topography changes achieved by patterning CLC coatings with local swelling properties.

From: Liquid crystal-based structural color actuators

Fig. 15

a Mechanism schematic of the patterned humidity/pH responsive IPN polymer coating. b Left: optical micrographs of a patterned IPN coating at a RH of 15% and 85%. Middle: surface topography of the patterned humidity responsive IPN coating at RH = 15%, 50%, and 80% (T = 20 °C). Right: optical micrographs of the patterned IPN polymer film at a pH 3 and 9. Reproduced with permission83. Copyright 2015, Wiley-VCH. c Photographs of a sponge-written “TU/e” logo that appeared upon exposure to water but remained hidden in the dry state. d Height profile of the “TU/e” logo in wet state showed swelling for the slash and shrinkage for the letters with respect to the green background and nearly flat surface in the dry state. Reproduced with permission85. Copyright 2018, American Chemical Society

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