Dielectric Anisotropy and Leslie Viscosity Coefficients in Nematic Liquid Crystals with Negative Dielectric Anisotropy Measured by Transient Current Analysis using Genetic Algorithm

We have derived the analytical expressions of the transient current in homeotropic nematic liquid crystal (NLC) cells. In this presentation, we determine the dielectric anisotropy and Leslie viscosity coefficients simultaneously by fitting the analytical expressions for transient current to the expe...

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Bibliographic Details
Published inProceedings of Japanese Liquid Crystal Society Annual meeting p. 109
Main Authors Oka, Masaki, Naito, Hiroyoshi, Inoue, Masaru, Ichinose, Hideo, Melanie, Klasen-memmer, Tarumi, Kazuaki
Format Journal Article
LanguageJapanese
Published THE JAPANESE LIQUID CRYSTAL SOCIETY 2011
Subjects
Genetic algorithm
Leslie viscosity coefficient
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Summary:We have derived the analytical expressions of the transient current in homeotropic nematic liquid crystal (NLC) cells. In this presentation, we determine the dielectric anisotropy and Leslie viscosity coefficients simultaneously by fitting the analytical expressions for transient current to the experimental data using a newly developed algorithm. The algorithm is based on a genetic algorithm, Levenberg-Marquardt method and Regula-Falsi method. We have demonstrated that the algorithm enables us to determine the temperature dependence of dielectric anisotropy and Leslie viscosity coefficients of NLCs with negative dielectric anisotropy.
Bibliography:PA21
ISSN:1880-3490
2432-5988
DOI:10.11538/ekitou.2011.0.109.0