在接口主动内马特流体中的第一顺序对齐过渡
Olga Bantysh1,2, Berta Martínez-Prat1,2, Jyothishraj Nambisan3
1Department of Materials Science and Physical Chemistry, Universitat de Barcelona, 08028 Barcelona, Spain.
Physical review letters
|June 15, 2024
概括
活体体质表现出不连续的相位过渡,与被动流体的连续过渡不同. 这项研究揭示了在活体阴性层中的对齐过渡过程中间歇性动态和共存区域.
科学领域:
- 软物质物理学 软物质物理学
- 活动物质物理学 活动物质物理学
- 液晶的动力学 液晶的动力学
背景情况:
- 活跃的体是具有自行驱动组件的系统,表现出复杂的流动和定向模式.
- 被动液晶经历了明确的相变,例如过渡到形-A相.
- 了解主动和被动系统之间的相互作用对于新型材料设计至关重要.
研究的目的:
- 实验性地研究2D主动阴性层与被动液晶相结合的动态相变.
- 分析温度坡道和磁场在被动相位过渡期间对活性敌人的行为的影响.
- 为了描述活体阴性系统中相变的顺序.
主要方法:
- 实验设置涉及一个二维的活跃阴性层与被动液晶接口.
- 应用温度坡道,以诱导被动液晶的相位过渡到 smectic-A 阶段.
- 使用磁场来影响活跃磁体的方向和流动模式.
主要成果:
- 活跃的阴性层从流转变为与磁场垂直对齐的准层状态.
- 观察结果显示,顺序参数的动态间歇,与被动流体的连续过渡不同.
- 观察到活跃的阴影中对齐和动荡区域的共存,表明了不连续的过渡.
结论:
- 活跃的阴性对齐过渡本质上是不连续的 (第一顺序),无论对称性或动量减缓.
- 与被动的smectic-A相位过渡的合影响了活跃的nematic的动态行为.
- 这些发现提供了关于活性物质系统相变的基本性质的见解.
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