The Influence of Depositing Velocity on Polyamic Acid Salt Langmuir–Blodgett Alignment Films for Nematic Liquid Crystal
作者:
M. Kimura,
A. Nakata,
K. Ishibashi,
T. Akahane,
M. Nishikawa,
期刊:
Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals
(Taylor Available online 1995)
卷期:
Volume 258,
issue 1
页码: 143-151
ISSN:1058-725X
年代: 1995
DOI:10.1080/10587259508034554
出版商: Taylor & Francis Group
关键词: Langmuir–Blodgett films;polyamic acid salt;nematic liquid crystal;depositing velocity;optical retardation;anchoring strength.
数据来源: Taylor
摘要:
The characterization of Langmuir–Blodgett (LB) orientation films in terms of the optical retardation as a function of the LB depositing velocity has been studied, and the surface anchoring strength of the LB films for a nematic liquid crystal has been estimated. The optical retardation decreases as the LB depositing velocity increases. In contrast, the anchoring strength increases as the LB depositing velocity increases. The macroscopic anchoring strength may not have a positive correlation with the optical retardation which reflects the microscopic orientational order. Furthermore, we succeeded in generating the high pretilt angle by only using the LB method. The pretilt angle gradually decreases with increasing the depositing velocity.
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