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Liquid Crystalline Behavior and Related Properties of Colloidal Systems of Inorganic Oxide Nanosheets

1
Division of Bio-Applications and Systems Engineering (BASE), Institute of Symbiotic Science and Technology, Tokyo University of Agriculture and Technology, 2-24-16 Naka-cho, Koganei-shi, Tokyo 184-8588, Japan
2
Department of Life, Environment, and Materials Science, Faculty of Engineering, Fukuoka Institute of Technology, 3-30-1 Wajiro-higashi, Higashi-ku, Fukuoka-shi, Fukuoka 811-0295, Japan
*
Author to whom correspondence should be addressed.
Materials 2009, 2(4), 1734-1761; https://doi.org/10.3390/ma2041734
Received: 29 August 2009 / Revised: 16 October 2009 / Accepted: 27 October 2009 / Published: 29 October 2009
(This article belongs to the Special Issue Liquid Crystals)
Inorganic layered crystals exemplified by clay minerals can be exfoliated in solvents to form colloidal dispersions of extremely thin inorganic layers that are called nanosheets. The obtained “nanosheet colloids” form lyotropic liquid crystals because of the highly anisotropic shape of the nanosheets. This system is a rare example of liquid crystals consisting of inorganic crystalline mesogens. Nanosheet colloids of photocatalytically active semiconducting oxides can exhibit unusual photoresponses that are not observed for organic liquid crystals. This review summarizes experimental work on the phase behavior of the nanosheet colloids as well as photochemical reactions observed in the clay and semiconducting nanosheets system. View Full-Text
Keywords: layered compound; inorganic nanosheet; colloid; liquid crystal; sol–gel transition; clay; semiconductor photocatalyst layered compound; inorganic nanosheet; colloid; liquid crystal; sol–gel transition; clay; semiconductor photocatalyst
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Nakato, T.; Miyamoto, N. Liquid Crystalline Behavior and Related Properties of Colloidal Systems of Inorganic Oxide Nanosheets. Materials 2009, 2, 1734-1761.

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