Abstract
An ellipsometric study of the interface between a thermotropic liquid crystal and water near the nematic–isotropic phase transition of the liquid crystal is presented. At temperatures above the transition, a nematic wetting layer appears at the interface if the water phase contains a surfactant inducing a homeotropic alignment of the nematic phase. The detailed behavior is significantly influenced by the concentration of the surfactant. The results can be described by a Landau model of nematic wetting in which the surfactant concentration tunes the magnitude of an ordering interface potential.
- Received 20 December 2005
DOI:https://doi.org/10.1103/PhysRevE.73.030702
©2006 American Physical Society