CUED Publications database

The effect of dopants on the twist elastic constant and the rotational viscosity coefficient for nematics

Coles, HJ and Dunmur, DA and Kagawa, H and Kondo, K and Kunimatsu, N and Luckhurst, GR 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 Science and Technology Section A: Molecular Crystals and Liquid Crystals, 347. pp. 157-166. ISSN 1058-725X

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Abstract

The twist elastic constant, K 2, and the rotational viscosity coefficient, γ 1, are of importance when the response lime 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 γ 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 γ 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 γ 1 for different systems raises fundamental questions which way not have a unique answer. 2000 OPA (Overseas Publishers Association) N.V. Published by license under the Gordon and Breach Science Publishers imprint.

Item Type: Article
Uncontrolled Keywords: Dynamic light scattering In-plane switching mode Liquid crystal displays Rotational viscosity coefficient Twist elastic constant
Subjects: UNSPECIFIED
Divisions: Div B > Photonics
Depositing User: Cron Job
Date Deposited: 07 Mar 2014 12:01
Last Modified: 27 Nov 2014 19:23
DOI: