相同带电胶体颗粒分散体系中的吸引相互作用：蒙特卡罗模拟

Attractive interactions in dispersions of identical charged colloidal particles: a Monte Carlo simulation.

作者信息

Feng Jie, Ruckenstein Eli

机构信息

Department of Chemical Engineering, State University of New York at Buffalo, Buffalo, NY 14260-4200, USA.

出版信息

J Colloid Interface Sci. 2004 Apr 15;272(2):430-7. doi: 10.1016/j.jcis.2003.11.059.

DOI:10.1016/j.jcis.2003.11.059

PMID:15028508

Abstract

Using the Debye-Hückel pair potential, the collective interactions between identical charged particles were examined via Monte Carlo simulations. The results have shown that when the number of charges per particle and the particle volume fraction were sufficiently large, the pair long-range electrostatic repulsion generated an effective attractive interaction between identical charged particles because of many-body effects. Disordered liquid-like structures, ordered crystal-like structures, ordered structures dispersed in disordered ones, and disordered structures dispersed in ordered ones have been found. The structures are dependent on the volume fraction and charge of the particles, as well as on the electrolyte concentration.

摘要

利用德拜-休克尔对势，通过蒙特卡罗模拟研究了相同带电粒子之间的集体相互作用。结果表明，当每个粒子的电荷量和粒子体积分数足够大时，由于多体效应，成对的长程静电排斥会在相同带电粒子之间产生有效的吸引相互作用。已发现无序的类液体结构、有序的类晶体结构、分散在无序结构中的有序结构以及分散在有序结构中的无序结构。这些结构取决于粒子的体积分数和电荷，以及电解质浓度。