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Anomalous anchoring effect of nanopolyimide Langmuir-Blodgett films in a twisted nematic liquid-crystal cell
Sugimura, A; Matsumoto, K; Zhongcan, OY; Iwamoto, M; Sugimura, A , OSAKA SANGYO UNIV,DEPT INFORMAT SYST ENGN,3-1-1 NAKAGAITO,DAITO,OSAKA 574,JAPAN.
1996
发表期刊PHYSICAL REVIEW E
ISSN1063-651X
卷号54期号:5页码:5217-5220
摘要In a recent paper [Phys. Rev. E 52, 681 (1995)] we showed that in the absence of an external field, the twisted structure of substrates with weak anchoring can induce a deviation of the director at the surfaces from the easy axis and that the anchoring energy can be evaluated by measuring this deviation. To test the prediction, the anchoring energy for nematic 4-pentyl-4'-cyanobiphenyl and polyimide Langmuir-Blodgett (LB) substrates with thicknesses in a range less than 10 nm has been measured. The anchoring energy is found to increase and saturate with the number of LB layers. This result, unlike that expected for the isotropic van der Waals interaction, reveals the anomalous anisotropic interfacial tension between a liquid-crystal slab and polyimide LB films with nanometer thickness. The generalized nonretarded van der Waals energy for the chain-chain interaction is proposed to explain the experimental result.
部门归属ACAD SINICA,INST THEORET PHYS,BEIJING 100080,PEOPLES R CHINA; TOKYO INST TECHNOL,DEPT PHYS ELECT,MEGURO KU,TOKYO 152,JAPAN
关键词Interface
学科领域Physics
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收录类别SCI
文献类型期刊论文
条目标识符http://ir.itp.ac.cn/handle/311006/12564
专题理论物理所1978-2010年知识产出
通讯作者Sugimura, A , OSAKA SANGYO UNIV,DEPT INFORMAT SYST ENGN,3-1-1 NAKAGAITO,DAITO,OSAKA 574,JAPAN.
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Sugimura, A,Matsumoto, K,Zhongcan, OY,et al. Anomalous anchoring effect of nanopolyimide Langmuir-Blodgett films in a twisted nematic liquid-crystal cell[J]. PHYSICAL REVIEW E,1996,54(5):5217-5220.
APA Sugimura, A,Matsumoto, K,Zhongcan, OY,Iwamoto, M,&Sugimura, A , OSAKA SANGYO UNIV,DEPT INFORMAT SYST ENGN,3-1-1 NAKAGAITO,DAITO,OSAKA 574,JAPAN..(1996).Anomalous anchoring effect of nanopolyimide Langmuir-Blodgett films in a twisted nematic liquid-crystal cell.PHYSICAL REVIEW E,54(5),5217-5220.
MLA Sugimura, A,et al."Anomalous anchoring effect of nanopolyimide Langmuir-Blodgett films in a twisted nematic liquid-crystal cell".PHYSICAL REVIEW E 54.5(1996):5217-5220.
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