title: The similarity of electric double-layer interaction from the general Poisson-Boltzmann theory.
abstract: We studied electric double-layer (EDL) interactions in electrolytes with different valence combinations. Our results show that the interactions are similar for electrolytes with the same co-ion valences and concentrations and such similarity increases with the co-ion valence and surface potential. A scaled surface potential was defined and found to be useful in characterizing the difference in EDL interaction. These results show that co-ions play a more important role than counterions in determining EDL potential and interaction in an electrolyte solution, especially for systems with high co-ion valence and/or high surface potentials.
authors.affiliation: Department of Biomedical Engineering, School of Medicine, Johns Hopkins University, Baltimore, MD 21205, USA.
authors.forename: Junfeng
authors.initials: J
authors.lastname: Zhang
authors.forename: Astrid
authors.initials: A
authors.lastname: Drechsler
authors.forename: Karina
authors.initials: K
authors.lastname: Grundke
authors.forename: Daniel Y
authors.initials: DY
authors.lastname: Kwok
mesh_terms: D003102:Colloids / Q000737:chemistry*; D008962:Models, Theoretical; D012996:Solutions / Q000737:chemistry; D055672:Static Electricity
chemical_list: D003102:Colloids; D012996:Solutions