Chandran, Achu and Khanna, P. K. and Haranath, D. and Biradar, Ashok M. (2018) Interfacial behavior of confined mesogens at smectic-C*-water boundary. Physical Review E , 97 (2). 022701-022708. ISSN 2470-0045

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Abstract

In this paper, we have investigated the behavior of mesogens at smectic-C*-water interface confined in a liquid crystal (LC) cell with interfacial geometry. Polarized optical microscopy was used to probe the appearance of various smectic-C* domain patterns at water interface owing to the reorientation of mesogens. The undulated stripe domains observed at the air interface of smectic-C* meniscus vanished as the water entered into the smectic layers and focal conical domain patterns appeared at smectic-C*-water boundary. A spatially variable electro-optical switching of LC molecules was also observed outside the electrode area of the interfacial cell. The electrode region at the interface, as well as on the water side, was damaged upon application of an electric field of magnitude more than 150 kV/m. The change in dielectric parameters of mesogens was extensively studied at interface after evaporating the water. These studies give fundamental insights into smectic-C*-water interface and also will be helpful in fabricating better LC devices for electro-optical and sensing applications.

Item Type:	Article
Additional Information:	Copyright for this article belongs to M/s American Physical Society.
Subjects:	Physics > Mathematical Physics Physics > Physics of Fluids and Plasmas
Divisions:	UNSPECIFIED
Depositing User:	Users 27 not found.
Date Deposited:	03 Feb 2020 11:32
Last Modified:	03 Feb 2020 11:32
URI:	http://npl.csircentral.net/id/eprint/3783

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