Abrupt orientational changes for liquid crystals adsorbed on a graphite surface
- 1 March 1998
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review E
- Vol. 57 (3), R2519-R2522
- https://doi.org/10.1103/physreve.57.r2519
Abstract
We have determined the alignment of a Gay-Berne model liquid crystal near a graphite surface using Monte Carlo computer simulations. We find in this regime, where adsorption is dominating with respect to the intermolecular interactions, a discontinuous change in anchoring from planar to normal on going from the first to the second adsorbed layer. We also find that the structure of the first two adsorbed layers is not affected by different director orientations induced in the bulk liquid crystal, but is entirely determined by the surface potential. This is a clear example of a breakdown of standard continuum theory in the proximity of a surface.Keywords
This publication has 33 references indexed in Scilit:
- Anchoring transitions in the nematic-substrate system: Study of the Landau–de Gennes modelThe Journal of Chemical Physics, 1996
- van der Waals–induced distortions in nematic liquid crystals close to a surfacePhysical Review E, 1996
- Nematic wetting at the free surface of 4-cyano-4′-n-alkyl-biphenylsThe Journal of Chemical Physics, 1995
- Molecular dynamics simulations of liquid crystal molecules adsorbed on graphiteLiquid Crystals, 1995
- Surface-Monolayer-Induced Bulk Alignment of Liquid CrystalsPhysical Review Letters, 1994
- Microscopic theory of anchoring transitions at the surfaces of pure liquid crystals and their mixtures. II. The effect of surface adsorptionThe Journal of Chemical Physics, 1992
- Microscopic theory of anchoring transitions at the surfaces of pure liquid crystals and their mixtures. I. The Fowler approximationThe Journal of Chemical Physics, 1992
- A Molecular Simulation of A Liquid-crystal ModelMolecular Simulation, 1991
- Surface effects and anchoring in liquid crystalsReports on Progress in Physics, 1991
- Computer simulation studies of anisotropic systems. XIX. Mesophases formed by the Gay-Berne model mesogenLiquid Crystals, 1990