Temperature Dependence of Nematic Anchoring Energy on Weak Surfaces of Polyimide Langmuir-Blodgett Films

Yu Peng Department of Physics and Electronics, Osaka Prefecture University, 1-1 Gakuen-cho, Sakai, Osaka, 593, Japan

Tetsuo Miyamoto Department of Physics and Electronics, Osaka Prefecture University, 1-1 Gakuen-cho, Sakai, Osaka, 593, Japan

Hiroyoshi Naito Department of Physics and Electronics, Osaka Prefecture University, 1-1 Gakuen-cho, Sakai, Osaka, 593, Japan

Michiyoshi Kuze Department of Information Systems Engineering, Osaka Sangyo University, -1-1 Nakagaito, Daito, Osaka, 574, Japan

Akihiko Sugimura Department of Information Systems Engineering, Osaka Sangyo University, -1-1 Nakagaito, Daito, Osaka, 574, Japan

Mitsumasa Iwamoto Department of Physical Electronics, Tokyo Institute of Technology, 2-12-1, O-okayama, Meguro, Tokyo, 152, Japan

Abstract

A theory for a twisted chiral nematic liquid crystal (TN) cell with weak anchoring boundaries has been developed. The anchoring energy at 4-pentyl-4′ -cyano biphenyl/polyimide Langmuir-Blodgett alignment layer interfaces has becn determined by mea.suring the saturation field of the TN cell. It is found that the anchoring energy is of the order of 10⁻⁶J/m² and decreases with increasing temperature toward the nematic-isotropic point.

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Temperature Dependence of Nematic Anchoring Energy on Weak Surfaces of Polyimide Langmuir-Blodgett Films

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Temperature Dependence of Nematic Anchoring Energy on Weak Surfaces of Polyimide Langmuir-Blodgett Films

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