de las Heras D, Mederos Luis, Velasco Enrique
Departamento de Física Teórica de la Materia Condensada, Universidad Autónoma de Madrid, E-28049 Madrid, Spain.
Phys Rev E Stat Nonlin Soft Matter Phys. 2009 Jan;79(1 Pt 1):011712. doi: 10.1103/PhysRevE.79.011712. Epub 2009 Jan 30.
By means of a molecular model, we examine hybrid nematic films with antagonistic anchoring angles where one of the surfaces is in the strong anchoring regime. If anchoring at the other surface is weak, and in the absence of wetting by the isotropic phase, the anchoring transition may interact with the capillary isotropic-nematic transition. For general anchoring conditions on this surface we confirm the existence of the steplike biaxial phase and the associated transition to the linear constant-tilt-rotation, configuration. The steplike phase is connected with the bulk isotropic phase for increasing film thickness so that the latter transition is to be interpreted as the capillary isotropic-nematic transition in a hybrid film.
通过分子模型，我们研究了具有对抗性锚定角的混合向列相薄膜，其中一个表面处于强锚定状态。如果另一个表面的锚定较弱，且不存在各向同性相的润湿现象，那么锚定转变可能会与毛细管各向同性 - 向列相转变相互作用。对于该表面上的一般锚定条件，我们证实了阶梯状双轴相的存在以及向线性恒定倾斜旋转构型的相关转变。随着薄膜厚度增加，阶梯状相与本体各向同性相相连，因此后一种转变应被解释为混合薄膜中的毛细管各向同性 - 向列相转变。
