Effects of Rubbing and Temperature Dependence of Polar Anchoring Strength of Homogeneously Aligned Nematic Liquid Crystal on Polyimide Langmuir-Blodgett Orientation Films
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概要
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The effect of rubbing on the polyimide (PI) Langmuir-Blodgett (LB) surface-alignment films has been successfully evaluated by observing the temperature dependence of the polar anchoring strength of nematic liquid crystal 4-cyano-4'-n-pentylbiphenyl (5CB). Upon rubbing, the PI-LB films showed a significant increase in the anchoring strength. The anchoring strength showed a nearly divergent decrease toward the clearing temperature, which is a manifestation of the diminished surface ordering, as previously pointed out for obliquely evaporated SiO films. Based on the van der Waals theory developed by Yokoyama et al. [J. Appl. phys. 61 (1987) 4501], the intrinsic parts of the anchoring energy have been obtained as a function of temperature and found to undergo nearly one order of magnitude increase on rubbing. The polar anchoring energies for 5CB were strongly related to the surface order parameter on PI-LB films.
- 社団法人応用物理学会の論文
- 1995-07-15
著者
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YOKOYAMA Hiroshi
Electrotechnical Laboratory
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Seo Dae-shik
Division Of Electronic And Information Engineering Faculty Of Technology Tokyo University Of Agricul
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Seo Dae-shik
Division Of Electronic And Information Engineering Faculty Of Technology Tokyo University Of Agricul
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Kobayashi Shunsuke
Division Of Electronic And Information Engineering Graduate School Of Technology Tokyo University Of
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KANG Dou-Yol
Department of Electrical Control Engineering, Hong Ik University
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Kang Dou-yol
Department Of Electrical Control Engineering Hong Ik University
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Kobayashi Shunsuke
Division Of Electronic And Information Engineering Faculty Of Technology Tokyo University Of Agricul
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Kobayashi Shunsuke
Division Of Electronic And Information Engineering Faculty Of Technology Tokyo University Of Agricul
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