We have recorded the angular dependence of the ellipsometric signal of bulkisotropic dodecylcyanobiphenyl (12CB) as a function of temperature in the pre-smectic temperature region. Using a simple model, the order parameter of the discontinuously growing smectic surface layer has been determined approaching the isotropic-smectic phase transition temperature. Also the pretransitional isotropic region of the isotropic-smectic transition of the liquid crystal compound 2-(4-(1,1-dihydro-2-(2-perfluorobutoxy)perfluoroethoxy) phenyl-5-octyl pyrimidine (H8F(4,2,1)MOPP) has been investigated.
|Original language||English (US)|
|Number of pages||8|
|Journal||Molecular Crystals and Liquid Crystals Science and Technology Section A: Molecular Crystals and Liquid Crystals|
|State||Published - 1999|
|Event||Proceedings of the 1998 17th International Liquid Crystal Conference - Strasbourg, France|
Duration: Jul 19 1998 → Jul 24 1998