CUED Publications database

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

Coles, HJ and Coles, HJ and Dunmur, DA and Dunmur, DA and Kagawa, H and Kagawa, H and Kondo, K and Kondo, K and Kunimatsu, N and Kunimatsu, N and Luckhurst, GR and Luckhurst, GR and Schott, C 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: 16 Jul 2015 14:13
Last Modified: 02 Sep 2015 03:15
DOI: