Berlin 2005 – wissenschaftliches Programm

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DY: Dynamik und Statistische Physik

DY 33: Ferrofluids and Liquid Crystals

DY 33.9: Vortrag

Montag, 7. März 2005, 16:00–16:15, TU H2032

Influence of Small Admixtures on Termal Director Fluctuations in Filled Flexoelectric Nematic Liquid Crystals — •Anna Berezovskaya — Univ. Kiev, UA–01033 Kiev, Ukraine

Thermal director fluctuation correlations were calculated in the case of flexoelectric liquid crystals (LC) without admixtures, when the effect of flexopolarisation appeared because of thermal director fluctuations [1].

In paper [2] it was shown that the interaction between the liquid crystal director and colloidal particle surface in filled liquid crystals leads to the screening of the thermally induced director fluctuation correlations.

Both these results will be linked together to consider the flexoelectric liquid crystal matrix filled with small spherical silica particles.These solid particles produce static LC director inhomogeneities around inclusions. Flexopolarisation appeared not only because of thermal director fluctuations but due to the static fluctuations too.

[1] P.G. de Gennes and J.Prost, The Physics of Liquid Crystals, Clarendon Press, Oxford, 1993

[2] O. Vasilyev, I. Pinkevich, T. Sluckin, Correlations of Thermal Director Fluctuations in Filled Liquid Crystals, Mol. Cryst. Liq. Cryst (preprint) Török:
D. Willmann: