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American Institute of Physics, Applied Physics Letters, 24(68), p. 3371

DOI: 10.1063/1.116507

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

Journal article published in 1996 by A. C. Bento ORCID, A. J. Palangana, L. R. Evangelista, M. L. Baesso, J. R. D. Pereira, E. C. da Silva, A. M. Mansanares
This paper was not found in any repository, but could be made available legally by the author.
This paper was not found in any repository, but could be made available legally by the author.

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Abstract

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.