Confocal microscopy study of texture transitions in a polymer stabilized cholesteric liquid crystal

被引：52

作者：

Held, GA ^{[1
]}

Kosbar, LL ^{[1
]}

Dierking, I ^{[1
]}

Lowe, AC ^{[1
]}

Grinstein, G ^{[1
]}

Lee, V ^{[1
]}

Miller, RD ^{[1
]}

机构：

[1] IBM CORP, ALMADEN RES LAB, SAN JOSE, CA 95120 USA

来源：

PHYSICAL REVIEW LETTERS | 1997年 / 79卷 / 18期

关键词：

Mathematical models - Microscopic examination - Molecular structure - Phase transitions - Stability - Textures;

D O I：

10.1103/PhysRevLett.79.3443

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The switching transition of polymer stabilized cholesteric texture liquid crystals is studied via confocal microscopy. This noninvasive probe enables the simultaneous imaging of the polymer network and the liquid crystal domain structure. We find that the two-stage switching often occurring in these systems results from the cholesteric experiencing two distinct environments: one consisting of very low polymer density, and the other strongly dominated by the polymer network. Fluctuations in the local polymer density produce effective random fields that broaden the transition.

引用

页码：3443 / 3446

页数：4

共 11 条

[1] Morphology and electro-optic properties of polymer-dispersed liquid-crystal films [J].