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Proceedings Paper

Super-structured smectics and their application
Author(s): I. Nishiyama; T. Yamamoto; J. Yamamoto; H. Yokoyama
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Paper Abstract

Super-structures produced in the smectic molecular organization are reviewed, and the origin for the structures discussed, in which it is emphasized that the frustration plays an important role in the emergence of the super-structures. Properties and structures of mysterious smectic phases possessing chirality-induced super-structures are introduced, including smectic blue and smectic Q (SmQ) phases that possess three dimensional (3D) structures. The molecular design on stabilizing the 3D structure is proposed. The molecular orientations in the 3D structures are not so sensitive to the external electric field due to an intricate smectic ordering, thus it has been difficult to imagine practical applications of these structures. The SmQ compound possessing an azobenzene core in the molecular structure is designed and the liquid-crystalline properties and photoresponse investigated. By means of the photoisomerization of the azobenzene moiety, we demonstrate that the 3D structure of the SmQ phase can be controlled by light as an external stimulus, suggesting a possibility for new applications utilizing the liquid-crystalline 3D structure.

Paper Details

Date Published: 12 September 2007
PDF: 11 pages
Proc. SPIE 6654, Liquid Crystals XI, 66540E (12 September 2007); doi: 10.1117/12.734893
Show Author Affiliations
I. Nishiyama, Dainippon Ink and Chemicals, Inc. (Japan)
T. Yamamoto, National Institute of Advanced Industrial Science and Technology (Japan)
J. Yamamoto, Kyoto Univ. (Japan)
H. Yokoyama, National Institute of Advanced Industrial Science and Technology (Japan)

Published in SPIE Proceedings Vol. 6654:
Liquid Crystals XI
Iam Choon Khoo, Editor(s)

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