在活性布朗粒子的二元混合物中,运动诱导的相分离
Daniel Jiménez-Flores1, Álvaro Rodríguez-Rivas2, José Manuel Romero-Enrique1,3
1Departamento de Física Atómica, Molecular y Nuclear, Área de Física Teórica, Facultad de Física, Universidad de Sevilla, Avenida de Reina Mercedes s/n, Sevilla 41012, Spain.
The Journal of chemical physics
|January 22, 2026
概括
布朗动力学模拟显示,二元混合物中的活性软粒子在高密度状态下表现出类似液体的行为,与单元系统中的类似固体的状态不同. 本研究探讨了在二维系统中的移动性诱导的相位分离.
科学领域:
- 软物质物理学 软物质物理学
- 统计力学 统计力学
- 计算物理 计算物理
背景情况:
- 活性物质系统表现出独特的集体行为,由自我推进驱动.
- 阶段分离是凝聚物质物理学中的一个基本现象.
- 与单元系统相比,二元混合物带来了复杂性.
研究的目的:
- 为了研究活动软布朗粒子的二维二进制混合物中的移动性诱导的相分离.
- 描述共存相的结构和动态特性.
- 为了比较二进制混合物与单元系统的行为.
主要方法:
- 使用布朗的动力学模拟.
- 使用非添加的Weeks-Chandler-Andersen潜力来建模粒子相互作用.
- 分析包括半径分布函数,六进制顺序参数和平均平方位移.
主要成果:
- 二元混合物的高密度共存状态在空间上是无序的,类似于液体.
- 在二进制系统中,低密度和高密度共存状态都在很长一段时间内表现出扩散性行为.
- 单元系统的固态状态也表现出由于活性拓缺陷的扩散行为.
结论:
- 与单元系统相比,活性软颗粒二进制混合物表现出不同的相分离行为.
- 二元混合物的高密度阶段以类似液体的动力学为特征.
- 活跃的拓缺陷在密集的活性物质系统的动态中起着至关重要的作用.
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