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偶极泊松-玻尔兹曼方程:靠近电荷界面的离子和偶极子

Dipolar Poisson-Boltzmann equation: ions and dipoles close to charge interfaces.

作者信息

Abrashkin Ariel, Andelman David, Orland Henri

机构信息

School of Physics and Astronomy, Raymond and Beverly Sackler Faculty of Exact Sciences, Tel Aviv University, Ramat Aviv, Tel Aviv 69978, Israel.

出版信息

Phys Rev Lett. 2007 Aug 17;99(7):077801. doi: 10.1103/PhysRevLett.99.077801.

Abstract

We present an extension to the Poisson-Boltzmann model where the dipolar features of solvent molecules are taken explicitly into account. The formulation is derived at mean-field level and can be extended to any order in a systematic expansion. It is applied to a two-plate system with oppositely charged surfaces. The ion distribution and profiles in the dipolar order parameter are calculated and can result in a large correction to the interplate pressure.

摘要

我们提出了泊松-玻尔兹曼模型的一个扩展,其中明确考虑了溶剂分子的偶极特征。该公式是在平均场水平上推导出来的,并且可以在系统展开中扩展到任意阶次。它被应用于具有相反电荷表面的双板系统。计算了离子分布和偶极序参量的分布,这可能会对板间压力产生很大的修正。

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