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Evidence for the Presence of a Twist-Grain-Boundary Structure in Confined Hybrid Non-Chiral Smectic Liquid Crystal Films

Published online by Cambridge University Press:  10 February 2011

Y. Hu  and
L. J. Martinez-Miranda
Y. Hu
Affiliation:
Department of Materials and Nuclear Engineering, University of Maryland, College Park, MD 20742
L. J. Martinez-Miranda
Affiliation:
Department of Materials and Nuclear Engineering, University of Maryland, College Park, MD 20742
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Abstract

We have used Grazing Incidence X-ray Scattering to study the depth dependence of the interfacial structure of smectic liquid crystal (8CB) hybrid films. These films are bounded by a grated glass substrate and air, and have been studied as a function of both temperature and thickness. Our measurements indicate the presence of both a chevron structure and a structure similar to the helical twist-grain-boundary (TGB) phase. Our measurements constitute the first to show that this structure can also be observed in hybrid smectic liquid crystal films. The twisted structure is the result of anchoring at two dissimilar competing confining surfaces.

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Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 543: Symposium W – Dynamics in Small Confining Systems IV , 1998 , 201
Copyright
Copyright © Materials Research Society 1999

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