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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, pp. 401-410.

Record type: Article


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.

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Published date: 2000
Keywords: rotational viscosity coefficient, twist elastic constant, in-plane switching mode, liquid crystal displays, dynamic light scatteringlight-scattering, liquid-crystals, electric-field


Local EPrints ID: 19036
ISSN: 1542-1406
PURE UUID: 6adcca7a-f661-40e4-98ca-d46c95b0e0db

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Date deposited: 18 Jan 2006
Last modified: 17 Jul 2017 16:34

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Author: H. J. Coles
Author: D. A. Dunmur
Author: H. Kagawa
Author: K. Kondo
Author: N. Kunimatsu
Author: G. R. Luckhurst
Author: C. Schott

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