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Phys. Rev. E 62, 6688–6693 (2000)

Liquid crystal director fluctuations and surface anchoring by molecular simulation

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Denis Andrienko1, Guido Germano1,2, and Michael P. Allen1
1H. H. Wills Physics Laboratory, University of Bristol, Royal Fort, Tyndall Avenue, Bristol BS8 1TL, United Kingdom
2Fakultät für Physik, Universität Bielefeld, 33615 Bielefeld, Germany

Received 2 June 2000; published in the issue dated November 2000

We propose a simple and reliable method to measure the liquid crystal surface anchoring strength by molecular simulation. The method is based on the measurement of the long-range fluctuation modes of the director in confined geometry. As an example, molecular simulations of a liquid crystal in slab geometry between parallel walls with homeotropic anchoring have been carried out using the Monte Carlo technique. By studying different slab thicknesses, we are able to calculate separately the position of the elastic boundary condition and the extrapolation length.

© 2000 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevE.62.6688
DOI:
10.1103/PhysRevE.62.6688
PACS:
61.30.Cz, 61.20.Ja, 07.05.Tp, 68.45.-v