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Alignment and alignment transition of bent core nematics

Journal article
Authors Omaima Abubakr Elamain
G. Hegde
Lachezar Komitov
Published in Applied Physics Letters
Volume 103
Issue 2
Pages Article Number: 023301
ISSN 0003-6951
Publication year 2013
Published at Department of Physics (GU)
Pages Article Number: 023301
Language en
Keywords liquid-crystals, phase, biaxiality, anisotropy
Subject categories Physical Sciences


We report on the alignment of nematics consisting of bimesogen bent core molecules of chlorine substituent of benzene derivative and their binary mixture with rod like nematics. It was found that the alignment layer made from polyimide material, which is usually used for promoting vertical (homeotropic) alignment of rod like nematics, promotes instead a planar alignment of the bent core nematic and its nematic mixtures. At higher concentration of the rod like nematic component in these mixtures, a temperature driven transition from vertical to planar alignment was found near the transition to isotropic phase. (C) 2013 AIP Publishing LLC.

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