定向顺序诱导模式切换在内马特-同otropic自由双层的合接口
Vinod Babasaheb Vanarse1, Neeru Yadav1, Srijita De2
1Department of Chemical Engineering, Indian Institute of Technology, Guwahati 781039, Assam, India. dipban@iitg.ac.in.
Soft matter
|November 3, 2025
概括
液晶二层中的不稳定性会产生复杂的模式. 这项研究揭示了片厚度和导演定位如何控制这些模式,为设计软材料提供了洞察力.
科学领域:
- 软物质物理学 软物质物理学
- 流体动力学 流体动力学
- 材料科学 材料科学 材料科学
背景情况:
- 具有可变形接口的双层系统表现出复杂的模式形成.
- 水层上的阴性液晶 (NLC) 薄膜具有独特的界面动力学.
- 了解这些不稳定性对于自我模式和模板的应用至关重要.
研究的目的:
- 理论上研究在阴性同位素自由双层系统中的界面不稳定性.
- 量化受Nematic弹性,界面能量和外部力量影响的不稳定性增长率.
- 探索各种力量在决定模式形成中的相互竞争作用.
主要方法:
- 使用长波水力动力学模型.
- 将埃里克森-莱斯利方程与纳维埃-斯托克斯方程结合起来.
- 分析了不同NLC厚度和导向方向的不稳定模式 (受限接口模式和自由表面模式).
主要成果:
- 在微厚薄膜中确定雷利-泰勒不稳定性 (RTIs) 和在纳米薄膜中分离压力驱动动力学.
- 确定薄膜厚度,定和扩散系数决定了受限界面模式 (CIM) 和自由表面模式 (FSM) 的主导地位.
- 观察到由NLC定向和界面能量学控制的关键过渡和模式切换.
结论:
- 阴性导体定向和界面能量学对NLC双层中的模式形成具有关键的影响.
- 这项研究提供了对分层软材料的时空结构的基本见解.
- 该框架有助于设计可重新配置的形态结构,用于湿,模板和自动图案应用.
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