The Poisson- Helmholtz- Boltzmann model is used to study the properties of a double electric layer formed near a single weakly charged spherical particle surrounded by a 1:1 electrolyte solution. Dividing into Coulomb and non- Coulomb (defined by the Yukawa potential) interactions between ions in solution, as well as between ions and a particle, we obtain mathematical expressions for the profiles of the corresponding potentials near the particle as a function of the main parameters of the model. When varying the values of key parameters, we find both monotonic and nonmonotonic profiles of the electrostatic potential, and we observe a change in the sign of the potential, resulting in the phenomena of inversion and reversal of charge. The conditions under which the inversion and reversal of the sign of the particle potential occur are determined. The dependence of the zero charge potential on the particle size, the concentration of a monovalent electrolyte solution, and the surface density of a non- Coulomb force source is considered.
A.I. Dolinyi (Wed,) studied this question.