Light-induced color change of cholesteric copolymers containing a menthone derivative is reported here. In addition, solutions of these copolymers in low molecular mass liquid crystal mixtures to allow local changes of the reflection color are investigated. The ability to reflect visible light makes cholesteric liquid crystals of interest for several applications in display technology or smart reflectors. The authors demonstrate an easy method for the color patterning of cholesteric liquid crystals based on photoisomerization of chiral dopants.
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Brehmer et al. (1998) studied this question.
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