We have investigated the effect of a disordered porous matrix on the cluster microphase formation of a two dimensional system where particles interact via competing interactions. To this end we have performed extensive Monte Carlo simulations and have systematically varied the densities of the fluid and of the matrix as well as the interaction between the matrix particles and between the matrix and fluid particles. Our results provide evidence that the matrix does have a distinct effect on the microphase formation of the fluid particles: as long as the particles interact both among themselves as well as with the fluid particles via a simple hard sphere potential, they essentially reduce the available space, in which the fluid particles form a cluster microphase. On the other hand, if we turn on a long-range tail in the matrix-matrix and in the matrix-fluid interactions, the matrix particles become nucleation centers for the clusters formed by the fluid particles.
Microphase Separation in Quorum-Sensing Active Particles with Competing Interactions
University of Luxembourg（卢森堡大学）；ISC-CNR, Institute for Complex Systems（复杂系统研究所（ISC-CNR））；NANOTEC-CNR, Soft and Living Matter Laboratory, Institute of Nanotechnology（纳米技术研究所软物质与生命物质实验室（NANOTEC-CNR））
Activity enhances transport while competing interactions preserve structure in colloidal microphase formers
Instituto de Química Física Blas Cabrera, Consejo Superior de Investigaciones Científicas (CSIC)（布拉斯·卡布雷拉物理化学研究所，西班牙国家研究委员会）；Departament de Física de la Matèria Condensada, Universitat de Barcelona（巴塞罗那大学凝聚态物理系）；Instituto de Física de Líquidos y Sistemas Biológicos, CONICET-UNLP（液体与生物系统物理研究所，阿根廷国家科学研究与技术促进委员会-拉普拉塔国立大学）；Universidad Tecnológica Nacional, Facultad Regional La Plata, CIMEC - Centro de Investigación en Mecánica Experimental y Computacional（国立技术大学，拉普拉塔地区学院，实验与计算力学研究中心）
Competing interactions in two dimensional Coulomb systems: Surface charge heterogeneities in co-assembled cationic-anionic incompatible mixtures
限制在平面上的带相反电荷的组分的二元混合物，例如阳离子和阴离子脂质双层，可能表现出局部分离。有利于宏观偏析的净短程相互作用和有利于混合的长程静电相互作用的相对强度决定了有限尺寸或微相偏析的长度尺度。系统的自由能可以在两个不同的区域中进行分析，当考虑高温下的小密度波动时，以及当考虑低温下系统的周期性有序时（F。J. Solis和M. Olvera de la Cruz，J.Chem.Phys.122，054905（2000））。用简单的分子动力学模拟研究了在不同的短程和长程相互作用强度下，带相反电荷的单体与短程Lennard-Jones势相互作用并被限制在二维平面内的情况.该系统具有良好的定义域，其特征在于它们的周期性的长度尺度以及它们的界面的取向排序。通过添加盐，有序的域消失，宏观上的混合物相分离与分析预测一致。
