Singh, G. and Choudhary , A. and G. , Vijaya Prakash and Biradar, A. M.
(2010)
Anisotropic behavior of water in ferroelectric liquid crystals.
Physical Review E, 81 (5).
051707-1.
ISSN 1095-3787
Abstract
The outcome of water addition in ferroelectric liquid crystal (FLC) has been investigated in uniform and
defect-free homogeneous and homeotropically aligned monodomain sample cells from electro-optical and
dielectric spectroscopic measurements. The lagging in optical response between nonconducting (spatially variable
switching) and conducting (conventional switching) portions of water added FLC sample cell has been
observed by frequency-dependent electro-optical studies. The bias-dependent water related new relaxation
peak near the conventional Goldstone mode relaxation process has been observed only in the homogeneous
alignment and not in the homeotropic one. Further, the significant increment in dielectric anisotropy as well as
faster diffusion of water along long molecular axis than short molecular axis has also been monitored. These
studies strongly suggest that the distribution of water is anisotropic in FLC medium and could be the reason for
new relaxation peak in the water added FLC sample.
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