Optical texture
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Phase Transition and Molecular Orientational Studies on Nematic Dimmer and Cholesteric Materials
Abstract: The binary mixture of nematic dimmer and cholesteric compounds viz., cholesteryl nonanoate (CN) and 1,7-bis-4-(4′-cyanobiphenyl) heptane (CB7CB) exhibits very interesting liquid crystalline phase’s at large range of concentrations and temperature. The concentrations with lower/higher percentage of CB7CB exhibit cholesteric and reentrant smectic-A phases sequentially when the specimen is cooled from its isotropic phase. The molecular tilt and birefringence have been discussed in the region of smetic-A and smectic-C phases, respectively …
Published in Research & Reviews : Journal of Physics · Vol. 7, Issue 1, 2018 · pp. 1–4 Read article