Physics – Condensed Matter – Materials Science
Scientific paper
2002-05-15
Physics
Condensed Matter
Materials Science
To appear in J. Chem. Phys
Scientific paper
10.1063/1.1481375
By Monte Carlo simulations of a soft ellipsoid model for liquid crystals, we study whether a layer of grafted liquid-crystalline chain molecules can induce tilt in a nematic fluid. The chains are fairly short (four monomers) and made of the same particles as the solvent. They are attached to a substrate which favors parallel (planar) alignment. At low grafting densities, the substrate dominates and we observe planar alignment. On increasing the grafting density, we find a first order transition from planar to tilted alignment. Beyond the transition, the tilt angle with respect to the surface normal decreases continuously. The range of accessible anchoring angles is quite large.
Lange Harald
Schmid Friederike
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