The electroconvection in dimeric nematic liquid crystals

The electroconvection (EC) in nematics with short range smectic C order, scanning both the high-temperature nematic region (N1) and the low-temperature one (N2), differentiated by a definite temperature T*, was investigated. The influence of the change of the magnitude and the sign of the electrocon...

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Bibliographic Details
Published in:Journal of Optoelectronics and Advanced Materials 2007-02, Vol.9 (2), p.438-441
Main Authors: Petrov, M, Katranchev, B, Keskinova, E, Naradikian, H
Format: Article
Language:English
Online Access:Get full text
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Summary:The electroconvection (EC) in nematics with short range smectic C order, scanning both the high-temperature nematic region (N1) and the low-temperature one (N2), differentiated by a definite temperature T*, was investigated. The influence of the change of the magnitude and the sign of the electroconductivity, aa, anisotropy, as well as the influence of the director n positions (both driven by temperature variation), on the EC mechanism and the corresponding optical patterns are discussed. The isotropic character of the EC instability initiated by the 'loss' of electroconductivity anisotropy below T, and in the vicinity of the nematic-isotropic phase transition, is discussed.
ISSN:1454-4164