An improved modified Poisson–Boltzmann equation in electric-double-layer theory

Abstract

A more accurate fluctuation potential problem is considered in the modified Poisson–Boltzmann theory. Numerical solutions of the resulting new equation are compared with those of the previous theory and 1 : 1, 1 : 2, 2 : 2 Monte Carlo calculations. The new modified Poisson–Boltzmann equation is found to be much more successful in predicting the Monte Carlo results, especially for the higher-valency electrolytes.