J. Phys. II France
Volume 3, Numéro 8, August 1993
Page(s) 1247 - 1253
DOI: 10.1051/jp2:1993195
J. Phys. II France 3 (1993) 1247-1253

Temperature dependence of surface orientation of nematic liquid crystals

A. L. Alexe-Ionescu, G. Barbero and G. Durand

Laboratoire de Physique des Solides, Bât. 510, Université Paris-Sud, 91405 Orsay Cedex, France

(Received 25 February 1993, accepted 7 May 1993)

The mixed splay bend curvature elastic constant K13 of nematics is shown to be proportional to S, the modulus of the quadrupolar orientational parmeter. One consequence is presented on the orientation of a nematic on a solid substrate : for an infinitely strong anchoring at an arbitrary angle, the surface energy contribution from K13 gives an apparent surface orientation which depends on the temperature.

61.30 - 68.10

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