The Effect of Homeotropic Surface Anchoring on the Critical Voltage for Unwinding the Cholesteric Phase
作者:
J.C. Lee,
D.W. Allender,
V.D. Neff,
期刊:
Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals
(Taylor Available online 1992)
卷期:
Volume 210,
issue 1
页码: 11-20
ISSN:1058-725X
年代: 1992
DOI:10.1080/10587259208030754
出版商: Taylor & Francis Group
数据来源: Taylor
摘要:
Experimental data are presented for the unwinding of the helical cholesteric structure in the presence of an applied electric field. Homeotropic surface anchoring conditions are known to reduce the magnitude of the critical unwinding voltage which depends on helical pitch and cell thickness. The experiments are unique in that the pitch is varied continuously at constant cell thickness rather than changing thickness at constant pitch. This is accomplished by employing cholesteric mixtures in which the inverse pitch changes linearly with temperature in the nematic compensation region.
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