Journal
ADVANCED MATERIALS
Volume 19, Issue 20, Pages 3244-+Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adma.200700209
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The photoinduced isotropic (PHI) state of cholesteric liquid crystals (CLCs) induced by the UV irradiation of a highly doped (azobenzene liquid crystal) CLC can be stable for tens of hours dominated by the lifetime of the cis isomers. Low-power laser light can be used to write complex 2D images (a car is shown), where the contrast arises from restoration of the reflective cholesteric phase.
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