Steric Effects in Electrolytes: A Modified Poisson-Boltzmann Equation
Soft Condensed Matter
2009-10-31 v1 Astrophysics
Chemical Physics
Abstract
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.
Cite
@article{arxiv.cond-mat/9803258,
title = {Steric Effects in Electrolytes: A Modified Poisson-Boltzmann Equation},
author = {I. Borukhov and D. Andelman and H. Orland},
journal= {arXiv preprint arXiv:cond-mat/9803258},
year = {2009}
}
Comments
4 pages, 2 figures