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Photoresponsive Anisotropic Soft Solids: Liquid‐Crystalline Physical Gels Based on a Chiral Photochromic Gelator
Author(s) -
Moriyama M.,
Mizoshita N.,
Yokota T.,
Kishimoto K.,
Kato T.
Publication year - 2003
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.200305056
Subject(s) - photoisomerization , azobenzene , liquid crystal , photochromism , materials science , liquid crystalline , soft materials , chemical engineering , photochemistry , nanotechnology , organic chemistry , polymer , composite material , optoelectronics , isomerization , catalysis , chemistry , engineering
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 trans – cis photoisomerization of the azobenzene moieties in a chiral hydrogen‐bonded gelator blended with a nematic liquid crystal.