电渗作为静电相关性的一种探测手段。

Electroosmosis as a probe for electrostatic correlations.

作者信息

Palaia Ivan, Telles Igor M, Dos Santos Alexandre P, Trizac Emmanuel

机构信息

Department of Physics and Astronomy, Institute for the Physics of Living Systems, University College London, London WC1E 6BT, UK and MRC Laboratory for Molecular Cell Biology, University College London, London WC1E 6BT, UK.

Instituto de Física, Universidade Federal do Rio Grande do Sul, Caixa Postal 15051, CEP 91501-970, Porto Alegre, RS, Brazil.

出版信息

Soft Matter. 2020 Dec 16;16(47):10688-10696. doi: 10.1039/d0sm01523g.

DOI:10.1039/d0sm01523g

PMID:33089848

Abstract

We study the role of ionic correlations on the electroosmotic flow in planar double-slit channels, without salt. We propose an analytical theory, based on recent advances in the understanding of correlated systems. We compare the theory with mean-field results and validate it by means of dissipative particle dynamics simulations. Interestingly, for some surface separations, correlated systems exhibit a larger flow than predicted by mean-field. We conclude that the electroosmotic properties of a charged system can be used, in general, to infer and weight the importance of electrostatic correlations therein.

摘要

我们研究了无盐情况下离子相关性对平面双缝通道中电渗流的作用。基于对相关系统理解的最新进展，我们提出了一种解析理论。我们将该理论与平均场结果进行比较，并通过耗散粒子动力学模拟对其进行验证。有趣的是，对于某些表面间距，相关系统表现出比平均场预测更大的流量。我们得出结论，一般来说，带电系统的电渗特性可用于推断和衡量其中静电相关性的重要性。