Steric effects in electrolytes: A modified Poisson-Boltzmann equation

被引：838

作者：

Borukhov, I ^{[1
]}

Andelman, D ^{[1
]}

Orland, H ^{[1
]}

机构：

[1] CTR ETUD SACLAY,SERV PHYS THEOR,F-91191 GIF SUR YVETTE,FRANCE

来源：

PHYSICAL REVIEW LETTERS | 1997年 / 79卷 / 03期

关键词：

D O I：

10.1103/PhysRevLett.79.435

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The adsorption of large ions from solution to a charged surface is investigated theoretically. A generalized Poisson-Boltzmann equation which takes into account the finite size of the ions is presented. We obtain analytical expressions for the electrostatic potential and ion concentrations at the surface, leading to a modified Grahame equation. At high surface charge densities the ionic concentration saturates to its maximum value. Our results are in agreement with recent experiments.

引用

页码：435 / 438

页数：4

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