Surfactant-induced nematic wetting layer at a thermotropic liquid crystal/water interface
Surfactant-induced nematic wetting layer at a thermotropic liquid crystal/water interface
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DOI：
10.1103/physreve.73.030702
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发表时间：
2006-03-01
影响因子：
2.4
通讯作者：
Bahr, C
中科院分区：
文献类型：
--
作者：
Bahr, C
用椭圆偏振法研究了液晶向列相-各向同性相变附近热致液晶与水的界面。在转变温度以上时，如果水相中含有诱导向列相向同性排列的表面活性剂，则在界面处会出现向列型润湿层。表面活性剂的浓度显著影响表面活性物质的详细行为。结果可以用向列型润湿的Landau模型来描述，在该模型中，表面活性剂浓度调节有序界面电势的大小。
An ellipsometric study of the interface between a thermotropic liquid crystal and water near the nematic-isotropic phase transition of the liquid crystal is presented. At temperatures above the transition, a nematic wetting layer appears at the interface if the water phase contains a surfactant inducing a homeotropic alignment of the nematic phase. The detailed behavior is significantly influenced by the concentration of the surfactant. The results can be described by a Landau model of nematic wetting in which the surfactant concentration tunes the magnitude of an ordering interface potential.