The effect of dopants on the twist elastic constant and the rotational viscosity coefficient for nematics
Coles, H. J., Dunmur, D. A., Kagawa, H., Kondo, K., Kunimatsu, N., Luckhurst, G. R. and Schott, C. (2000) The effect of dopants on the twist elastic constant and the rotational viscosity coefficient for nematics. Molecular Crystals and Liquid Crystals, 347, 401-410.
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The twist elastic constant, K-2, and the rotational viscosity coefficient, gamma (1), are of importance when the response time for the in-plane switching mode is studied. Since adding dopants is one technique to improve the response characteristics, the effect of dopants on these physical properties is significant. The effect on K-2, and gamma (1) of adding alkyl(alkoxy) phenylcyclopentenones and alkyl(alkoxy) cyanobiphenyls to the base mixture ZLI-4792 together with their temperature dependence have been investigated using different temperature scales. The reduced temperature scale showed the effect of these dopants on K-2 is small. On the other hand, the temperature dependence of gamma (1) depends on both the absolute temperature scale and the reduced temperature scale. Therefore, it is clear that the choice of temperature scale with which to compare gamma (1) for different systems raises fundamental questions which way not have a unique answer.
|Keywords:||rotational viscosity coefficient, twist elastic constant, in-plane switching mode, liquid crystal displays, dynamic light scatteringlight-scattering, liquid-crystals, electric-field|
Q Science > QD Chemistry
|Divisions:||University Structure - Pre August 2011 > School of Chemistry
|Date Deposited:||18 Jan 2006|
|Last Modified:||31 May 2011 23:28|
|RDF:||RDF+N-Triples, RDF+N3, RDF+XML, Browse.|
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