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封闭和拓的影响:2-TIPS与MIPS
Nayana Venkatareddy1, Jaydeep Mandal1, Prabal K Maiti1
1Centre for Condensed Matter Theory, Department of Physics, Indian Institute of Science, Bangalore 560012, India. maiti@iisc.ac.in.
Soft matter
|October 31, 2023
概括
在活性-被动颗粒混合物中,两种温度诱导相位分离 (2-TIPS) 受限制几何学的影响. 阶段分离的程度因密度和维度而异,在二维和球形系统中表现出独特的行为.
科学领域:
- 统计力学 统计力学
- 软物质物理学 软物质物理学
- 非平衡系统 非平衡系统
背景情况:
- 两个温度诱导相位分离 (2-TIPS) 模型是使用标量活动的活性和被动粒子的二元混合物.
- 活性颗粒与高温恒温器相互作用,而被动颗粒与低温恒温器相互作用.
- 活动参数 (χ) 根据温度差异量化系统的非平衡性质.
研究的目的:
- 调查封闭几何学对3D和2D二进制混合物中活性和被动粒子相分离的影响.
- 分析粒子密度和活性对相分离行为的影响.
- 将封闭系统与散装相位分离进行比较,并探索二维和球形封闭的现象.
主要方法:
- 模拟由平行墙所限制的3D二进制混合物.
- 模拟的二进制混合物被限制在一个球形腔内.
- 分析2D散装和封闭系统,包括那些在球形表面.
- 检查粒子密度,活性和几何限制效应.
主要成果:
- 在3D中,通过平行墙壁的限制减少了高密度的相位分离,但与散装相比,在低密度时增强了相位分离.
- 球形封闭导致辐射相分离,分离范围增加,在被动区域增强分层/压缩.
- 在高密度的2D系统中,由于活性粒子捕获,相位分离减少,类似于密度-稀释相位共存.
结论:
- 封闭体几何学显著改变了活性-被动二进制混合物的相分离.
- 在封闭系统中,2-TIPS的行为,特别是在2D和球形表面,与运动诱导相分离 (MIPS) 有相似之处.
- 密度和维度在确定相位分离的程度和性质方面起着至关重要的作用.
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