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Proceedings Paper

Photostimulated structural changes of liquid crystal physical gels
Author(s): Masaya Moriyama; Norihiro Mizoshita; Takashi Kato
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Paper Abstract

Photoresponsive liquid crystal physical gels are formed from a hydrogen-bonded gelator containing photochromic azobenzene moieties and nematic or discotic liquid crystals. The bistable gel structures based on the trans-azobenzene gelator could be achieved by combining the trans-cis photoisomerization of the azobenzene moieties and thermal treat-ment. Upon UV irradiation, the trans-cis photoisomerization causes the transition from the initial gel states to the liquid crystal sol states. The cis-trans back-isomerization causes reaggregation of the trans-gelator in the liquid crystals. This leads to the formation of the second gel states which have the structures reflecting the liquid crystal order. The initial gel states can be reversibly changed to the reformed gel states by photoirradiation and thermal treatments. The photo-induced reversible structural changes of the anisotropic physical gels are applied to rewritable information recordings.

Paper Details

Date Published: 15 October 2004
PDF: 10 pages
Proc. SPIE 5518, Liquid Crystals VIII, (15 October 2004); doi: 10.1117/12.559364
Show Author Affiliations
Masaya Moriyama, Univ. of Tokyo (Japan)
Norihiro Mizoshita, Univ. of Tokyo (Japan)
Takashi Kato, Univ. of Tokyo (Japan)

Published in SPIE Proceedings Vol. 5518:
Liquid Crystals VIII
Iam-Choon Khoo, Editor(s)

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