导演在诱导的C_{A}膜表面的简单边缘位移上定
1Université de Strasbourg, CNRS, Institut de Physique et Chimie des Matériaux de Strasbourg, UMR 7504, F- 67000 Strasbourg, France.
Physical review. E
|June 17, 2023
概括
测量结果显示,c-director在 smectic-C_{A} 薄膜中的异位上固定是由于局部化而产生的. 这种定行为取决于角度,在电场下表现出明显的可逆和不可逆路径.
科学领域:
- 软物质物理学 软物质物理学
- 液晶是一种液晶.
- 表面科学是一门学科.
背景情况:
- 斯梅克-C_{A} 薄膜表现出复杂的表面现象,特别是在位移时.
- 了解c-导演在位移时的定对于预测电影行为的重要.
- 之前的研究缺乏对定机制和动态反应的详细分析.
研究的目的:
- 精确测量C_{A}膜中的边缘位移上的c-director定.
- 调查固的起源,提出一种局部融机制.
- 描述在不同电场下固定状态的动态反应.
主要方法:
- 使用一种特殊的形膜的三明治配置,具有位移和表面极化.
- 应用电场来诱导扭矩,平衡位移固定扭矩.
- 通过偏振显微镜测量薄膜扭曲,并使用里埃序列分析扭矩导向器角度数据.
主要成果:
- 已确认的c-director定源于位移核心的局部部分化,取决于定角度.
- 确定了两个不同的动态模式:可逆平衡路径和不可逆消耗性歇斯底里循环.
- 量化定参数 (k_{a1}^{F2},k_{a2}^{F2}) 和估计的旋转粘度和消散时间.
结论:
- 这项研究提供了对c-director在 smectic-C_{A} 电影中的异位固定的详细了解.
- 这些发现表明,一种新的机制涉及脱位核心融和动态定状态.
- 这项工作奠定了通过伪卡西米尔力来分析多个位移之间的相互作用的基础.
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