Guo Wei, Bahr Christian
Max Planck Institute for Dynamics and Self-Organization, Bunsenstrasse 10, D-37073 Göttingen, Germany.
Phys Rev E Stat Nonlin Soft Matter Phys. 2009 Jan;79(1 Pt 1):011707. doi: 10.1103/PhysRevE.79.011707. Epub 2009 Jan 23.
We present a study of focal conic domains in smectic- A liquid-crystal films on solid substrates. The antagonistic anchoring conditions of the film surfaces, random planar at the substrate interface and homeotropic at the air interface, enforce the formation of focal conic domains the lateral size of which is dependent on the film thickness. The strength of the planar anchoring on the solid substrate is systematically varied by coating the substrate with special alkoxysilane compounds. For each anchoring strength value, the relation between the size of the focal conic domains and the film thickness is determined. Increasing the planar anchoring strength influences the size-thickness relation and leads to the formation of larger focal conic domains.
我们展示了一项关于固体衬底上近晶 - A液晶膜中焦锥域的研究。膜表面的对立锚定条件，即衬底界面处为随机平面锚定，空气界面处为垂直锚定，促使焦锥域的形成，其横向尺寸取决于膜的厚度。通过用特殊的烷氧基硅烷化合物涂覆衬底，系统地改变固体衬底上平面锚定的强度。对于每个锚定强度值，确定焦锥域尺寸与膜厚度之间的关系。增加平面锚定强度会影响尺寸 - 厚度关系，并导致形成更大的焦锥域。
