模型胶体育川系统二元混合物中的耦合动力学。

IF 2.9 3区 化学 Q3 CHEMISTRY, PHYSICAL
Soft Matter Pub Date : 2024-11-01 DOI:10.1039/D4SM01123F
Daniel Weidig and Joachim Wagner
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引用次数: 0

摘要

我们通过布朗动力学模拟研究了由高电荷胶体粒子组成的二元混合物的动力学行为。我们研究了高度稀释悬浮液中大小不同但带相同电荷的颗粒,所有物种之间的相互作用几乎完全相同。在静电相互作用的介导下,不同的短时间自扩散系数会诱发不同大小粒子的自动力学和集体动力学耦合:较大物种的长时间自扩散系数会因移动性较强的较小物种的存在而增加,反之亦然。在集体动力学中也观察到类似的耦合效应,中间散射函数初始衰减的时间常数和函数形式都会受到不同大小物种的影响。我们系统地分析了耦合效应与大小比例、数量密度和静电相互作用强度的关系。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Coupled dynamics in binary mixtures of model colloidal Yukawa systems†

Coupled dynamics in binary mixtures of model colloidal Yukawa systems†

The dynamical behavior of binary mixtures consisting of highly charged colloidal particles is studied by means of Brownian dynamics simulations. We investigate differently sized, but identically charged particles with nearly identical interactions between all species in highly dilute suspensions. Different short-time self-diffusion coefficients induce, mediated by electrostatic interactions, a coupling of both self and collective dynamics of differently sized particles: the long-time self-diffusion coefficients of a larger species are increased by the presence of a more mobile, smaller species and vice versa. Similar coupling effects are observed in collective dynamics where both time constant and functional form of intermediate scattering functions' initial decay are influenced by the presence of a differently sized species. We provide a systematic analysis of coupling effects in dependence on the ratio of sizes, number densities, and the strength of electrostatic interactions.

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来源期刊
Soft Matter
Soft Matter 工程技术-材料科学:综合
CiteScore
6.00
自引率
5.90%
发文量
891
审稿时长
1.9 months
期刊介绍: Soft Matter is an international journal published by the Royal Society of Chemistry using Engineering-Materials Science: A Synthesis as its research focus. It publishes original research articles, review articles, and synthesis articles related to this field, reporting the latest discoveries in the relevant theoretical, practical, and applied disciplines in a timely manner, and aims to promote the rapid exchange of scientific information in this subject area. The journal is an open access journal. The journal is an open access journal and has not been placed on the alert list in the last three years.
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