在混杂宿主中,不相称长度的客粒子的优先排序
Guido L A Kusters1, Martijn Barella2, Paul van der Schoot1
1Department of Applied Physics and Science Education, Eindhoven University of Technology, Eindhoven, The Netherlands.
The Journal of chemical physics
|February 26, 2024
概括
粘液中的棒状客体颗粒根据其长度优先与宿主层或与宿主层对齐. 轻微的不匹配会产生中间排序,并影响粒子扩散动态.
科学领域:
- 软物质物理学 软物质物理学
- 材料科学 材料科学 材料科学
- 物理化学 物理化学
背景情况:
- 质液晶表现出层层的结构.
- 这些有序流体内的客粒子的行为是复杂的.
- 之前的研究假设对中间客人订购的子效应.
研究的目的:
- 研究状客体粒子在状宿主液体中的优先排序.
- 了解客粒子长度和方向不匹配对排序和扩散的影响.
- 为观察到的扩散模式提供自由能源景观解释.
主要方法:
- 密度函数理论 (DFT) 的计算.
- 完美对齐的杆子和杂的宿主流体的建模.
- 应用克莱默斯的理论来分析扩散.
主要成果:
- 长度与宿主粒子相似的客粒子按相位顺序;较短/较长的粒子按反相位顺序.
- 轻微的方向不匹配引入了额外的能量障碍,将自由能量最小值划分为中间长度比.
- 根据客粒子的长度确定了三种扩散模式 (缓慢,快速,中间).
结论:
- 这项研究为中介扩散提供了一个自由能量景观解释,补充了养效应假设.
- 一个简单的对齐棒的模型与轻微的定向不匹配捕获不相称的客粒子的关键特征.
- 结果提供了对有序流体中异性质粒子的自我组装和动态的见解.
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