title: Determination of the zeta potential for highly charged colloidal suspensions.
abstract: We compute the electrostatic potential at the surface, or zeta potential ζ, of a charged particle embedded in a colloidal suspension using a hybrid mesoscopic model. We show that, for weakly perturbing electric fields, the value of ζ obtained at steady state during electrophoresis is statistically indistinguishable from ζ in thermodynamic equilibrium. We quantify the effect of counter-ion concentration on ζ. We also evaluate the relevance of the lattice resolution for the calculation of ζ and discuss how to identify the effective electrostatic radius.
authors.affiliation: Departament de Fisica Fonamental, Universitat de Barcelona, Carrer Marti i Franques, 08028 Barcelona, Spain. giupponi@ffn.ub.es
authors.forename: Giovanni
authors.initials: G
authors.lastname: Giupponi
authors.forename: Ignacio
authors.initials: I
authors.lastname: Pagonabarraga
mesh_terms: D003102:Colloids; D008962:Models, Theoretical
chemical_list: D003102:Colloids