Locally optimal geometry for surface-enhanced diffusion
Locally optimal geometry for surface-enhanced diffusion
复制标题
表面增强扩散的局部最优几何结构
DOI：
10.1103/physreve.108.045101
复制
发表时间：
2023
影响因子：
2.4
通讯作者：
Jensen, Kaare H.
中科院分区：
文献类型：
--
作者：
Christensen, Anneline H.;Gupta, Ankur;Chen, Guang;Peters, Winfried S.;Knoblauch, Michael;Stone, Howard A.;Jensen, Kaare H.
分子在散装液体中的扩散根据菲克定律进行，该定律规定粒子电流与导电面积成正比。这限制了过滤系统的效率，在过滤系统中，选择性和渗透性都是有价值的。先前的研究表明，相对于体积条件，扩散物种和固体边界之间的相互作用可以增强或减少粒子的输运。然而，只有在粒子电流和导电面积之间保持单调关系的情况下才为人所知。本文揭示了当导电面积减小时，扩散电流增大的系统。这些例子是基于带电粒子与电双层相互作用的百年理论。这一惊人的发现可以提高过滤效率，并可能促进我们对生物孔结构的理解。
Molecular diffusion in bulk liquids proceeds according to Fick's law, which stipulates that the particle current is proportional to the conductive area. This constrains the efficiency of filtration systems in which both selectivity and permeability are valued. Previous studies have demonstrated that interactions between the diffusing species and solid boundaries can enhance or reduce particle transport relative to bulk conditions. However, only cases that preserve the monotonic relationship between particle current and conductive area are known. In this paper, we expose a system in which the diffusive current increases when the conductive area diminishes. These examples are based on the century-old theory of a charged particle interacting with an electrical double layer. This surprising discovery could improve the efficiency of filtration and may advance our understanding of biological pore structures.