Geometrical anisotropy dependence of thermal diffusivity in lyotropic nematics: Mode mismatched thermal lens measurements

被引：31

作者：

Bento, AC ^{[1
]}

Palangana, AJ ^{[1
]}

Evangelista, LR ^{[1
]}

Baesso, ML ^{[1
]}

Pereira, JRD ^{[1
]}

daSilva, EC ^{[1
]}

Mansanares, AM ^{[1
]}

机构：

[1] UNIV ESTADUAL CAMPINAS, INST FIS GLEB WATAGHIN, BR-13083970 CAMPINAS, SP, BRAZIL

来源：

APPLIED PHYSICS LETTERS | 1996年 / 68卷 / 24期

关键词：

D O I：

10.1063/1.116507

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

In this work the quantitative theoretical treatment for two beam mode mismatched thermal lens spectrometry is applied to investigate the thermal diffusivity anisotropy of two lyotropic mixtures: (1) potassium laurate, decanol and water and (2) potassium laurate, potassium chloride and water in the nematic calamitic phase. The ratio between the thermal diffusivities parallel and perpendicular to the director has been shown to be smaller than those reported for thermotropic liquid crystal. This observation is explained by using a simple model where this ratio is correlated to the micellar shape anisotropy. (C) 1996 American Institute of Physics.

引用

页码：3371 / 3373

页数：3

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