CORRELATIONS BETWEEN SURFACE AND BULK LIQUID-CRYSTAL ALIGNMENT OBSERVED WITH OPTICAL 2ND-HARMONIC GENERATION

被引：16

作者：

BARMENTLO, M

HOLLERING, RWJ

VANAERLE, NAJM

机构：

[1] Philips Research Laboratories, Eindhoven, 5600 JA

来源：

LIQUID CRYSTALS | 1993年 / 14卷 / 02期

关键词：

D O I：

10.1080/02678299308027663

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

We report a direct experimental observation of surface-induced liquid crystal (LC) monolayer orientation and its relation to the LC bulk alignment. Using optical second-harmonic generation from these LC monolayers, adsorbed on rubbed polymer surfaces, we determined both the polar and azimuthal orientation of the LC molecules. A close correlation between the rubbing-induced azimuthal orientational distribution of the LC monolayers and the resulting LC bulk pretilt angle has been observed. A simple model based on epitaxial growth of the bulk LC on top of the first LC monolayer is proposed to explain this correlation.

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页码：475 / 481

页数：7

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