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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

Authors

Ivan N. Derbenev

Anatoly V. Filippov

Anthony J. Stace



Abstract

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.

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), Article 084103. https://doi.org/10.1063/1.4961091

Journal Article Type Article
Acceptance Date Aug 1, 2016
Online Publication Date Aug 23, 2016
Publication Date Aug 28, 2016
Deposit Date Mar 26, 2020
Journal The Journal of Chemical Physics
Print ISSN 0021-9606
Electronic ISSN 1089-7690
Publisher American Institute of Physics
Peer Reviewed Peer Reviewed
Volume 145
Issue 8
Article Number 084103
DOI https://doi.org/10.1063/1.4961091
Public URL https://nottingham-repository.worktribe.com/output/1868729
Publisher URL https://aip.scitation.org/doi/10.1063/1.4961091