Malik, A. and Choudhary , A. and Silotia, P. and Biradar, A. M. (2011) Effect of ZnO nanoparticles on the SmC*-SmA* phase transition temperature in electroclinic liquid crystals. Journal of Applied Physics, 110 (6). 064111. ISSN 1089-7550

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Abstract

ZnO nanoparticles (NPs), synthesized in an alcoholic medium at room temperature, were added to electroclinic liquid crystal (ELC) materials. The addition of ZnO NPs in ELCs, caused a remarkable shift in SmC*-SmA* phase transition which was investigated from the dielectric and electro-optical measurements. The anchoring of ELC molecules around ZnO NPs creates orientational distortions near the surface, which may give additional ordering to the ELC molecular arrangement. After analyzing collective dielectric relaxation processes of ZnO NP doped ELCs, three distinct loss peaks were observed. The different behavior of ZnO NP doped ELC from pure ELC has been explained by determining the dielectric strength, the distribution parameter and the corresponding relaxation frequency, and so on, and then these results have been compared with the data calculated by using the theoretical model. The effect of ZnO NPs addition on physical parameters, such as spontaneous polarization (Ps) and rotational viscosity (η) has also been observed.

Item Type:	Article
Subjects:	Applied Physics/Condensed Matter Physics
Divisions:	UNSPECIFIED
Depositing User:	Mr. Abhishek Yadav
Date Deposited:	14 Dec 2012 09:29
Last Modified:	14 Dec 2012 09:29
URI:	http://npl.csircentral.net/id/eprint/874

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