# Electrical conductivity and dielectric constant measurements of liquid crystal-gold nanoparticle composites

Prasad, Krishna S and Sandhya, KL and Nair, Geetha G and Hiremath, Uma S and Yelamaggad, CV and Sampath, S (2006) Electrical conductivity and dielectric constant measurements of liquid crystal-gold nanoparticle composites. In: Liquid Crystals, 33 (10). pp. 1121-1125.

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## Abstract

The behaviour of the anisotropic electrical conductivity of liquid crystal-gold nanoparticle (LC-GNP) composites consisting of a commercially available room temperature nematic compound doped with alkylthiol-capped GNPs has been investigated. The nematic-isotropic transition of the composite decreases nearly linearly with increasing X, the concentration of GNP (in weight %) at a rate of about 1°C /weight %. The inclusion of GNPs increases the electrical conductivity of the system with the value increasing by more than two orders of magnitude for X = 5%. However, the anisotropy in conductivity, defined as the ratio of the conductivity along $(\sigma_{\parallel})$ and orthogonal $(\sigma_{\perp})$ to the director shows a much smaller but definite decrease as X increases.

Item Type: Journal Article Copyright of this article belongs to Taylor & Francis Group. Inorganic Chemistry;Physical Chemistry Division of Chemical Sciences > Inorganic & Physical Chemistry Ramya Krishna 03 Jun 2008 27 Aug 2008 13:25 http://eprints.iisc.ac.in/id/eprint/14152