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Electrostatic interactions between charged dielectric particles in an electrolyte solution

Derbenev, Ivan N.; Filippov, Anatoly V.; Stace, Anthony J.; Besley, Elena


Research Fellow in Computationalchemistry

Anatoly V. Filippov

Anthony J. Stace

Professor of Theoretical Computational Chemistry


Theory is developed to address a significant problem of how two charged dielectric particles interact in the presence of a polarizable medium that is a dilute solution of a strong electrolyte. The electrostatic force is defined by characteristic parameters for the interacting particles (charge, radius, and dielectric constant) and for the medium (permittivity and Debye length), and is expressed in the form of a converging infinite series. The limiting case of weak screening and large inter-particle separation is considered, which corresponds to small (macro)ions that carry constant charge. The theory yields a solution in the limit of monopole and dipole terms that agrees exactly with existing analytical expressions, which are generally used to describe ion-ion and ion-molecular interactions in a medium. Results from the theory are compared with DLVO theory and with experimental measurements for the electrostatic force between two PMMA particles contained in a nonpolar solvent (hexadecane) with an added charge control agent.

Journal Article Type Article
Publication Date Aug 28, 2016
Journal The Journal of Chemical Physics
Print ISSN 0021-9606
Electronic ISSN 1089-7690
Publisher AIP Publishing
Peer Reviewed Peer Reviewed
Volume 145
Issue 8
Article Number 084103
APA6 Citation Derbenev, I. N., Filippov, A. V., Stace, A. J., & Besley, E. (2016). Electrostatic interactions between charged dielectric particles in an electrolyte solution. Journal of Chemical Physics, 145(8),
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