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在自由悬浮的液晶薄膜上的二维限制效应Confinement effects in two dimensions on freely suspended liquid crystal films |
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| 课程网址: | http://videolectures.net/clc2010_clark_cetd/ |
| 主讲教师: | Noel A. Clark |
| 开课单位: | 科罗拉多大学 |
| 开课时间: | 2010-08-05 |
| 课程语种: | 英语 |
| 中文简介: |  |
| 课程简介: | We are studying the interactions and dynamics of islands, textures, and topological defects on freely suspended smectic C liquid crystal films. Freely suspended smectic films are quantized in thickness in units of single smectic layers and Islands studied here are thicker stacks of layers on a thinner background film. We will report on the following: a) Diffusion of islands on smectic A films, revealing the distinct effects of hydrodynamic drag from liquid crystal flow and from airflow. b) Interactions of islands on smectic C films, exploring the effects of chirality on the collective behavior of islands and their companion topological defects. c) Dynamic behavior of buckminsterfullerene nanospheres in freely suspended films. d) Effects of polarization on textures and defects in two dimensions, where a dramatic transformation in textures is found to accompany the increase of polarization, a change which can be produced by increase of the enentiomeric excess (ee) of the LC. The images below show an example, where the ee = 0% textures are smooth with large orientation fluctuations, the ee = 100% textures exhibit sharp discontinuities. |
| 关 键 词: | 液晶流; 气流; 动力学 |
| 课程来源: | 视频讲座网 |
| 最后编审: | 2020-07-30：yumf |
| 阅读次数: | 69 |