Sl. Carnie et al., COMPUTATION OF FORCES BETWEEN SPHERICAL COLLOIDAL PARTICLES - NONLINEAR POISSON-BOLTZMANN THEORY, Journal of colloid and interface science, 165(1), 1994, pp. 116-128
A numerical scheme has been developed to calculate the electrical doub
le-layer force between two spherical colloidal particles based on the
nonlinear Poisson-Boltzmann theory. Results for identical spheres inte
racting under constant surface potential, constant surface charge, or
equilibrium dissociation of ionizable surface groups are given. The me
thod can be readily applied to the case of nonidentical spheres. These
results serve as benchmarks for delineating the accuracy of approxima
te methods for the calculation of the interaction between particles ba
sed on the Deryaguin approximation, the superposition approximation, a
nd the Hogg-Healy-Fuerstenau approximation, as well as numerical solut
ions of the problem based on the linearized Poisson-Boltzmann (Debye-H
uckel) theory. (C) 1994 Academic Press, Inc.