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M. Moriyama, N. Mizoshita, T. Yokota, K. Kishimoto and T. Kato Photoresponsive Anisotropic Soft Solids: Liquid-Crystalline Physical Gels Based on a Chiral Photochromic Gelator Advanced Materials 15

Article first published online: 18 AUG 2003 | DOI: 10.1002/adma.200305056

Photoinduced reversible structural changes of anisotropic physical gels are applied to re-writable patterning (see Figure, a photo of a re-writable pattern). The change between a nematic gel and a cholesteric gel via a cholesteric liquid-crystalline sol state is induced by transcis photoisomerization of the azobenzene moieties in a chiral hydrogen-bonded gelator blended with a nematic liquid crystal.

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