Long-time self-diffusion of charged Brownian particles: self-friction vs. electrolyte friction

J.M. Méndez-Alcaraz and O. Alarcón-Waess

Physica A: Statistical Mechanics and its Applications, 1999, vol. 268, issue 1, 75-88

Abstract: The generalized Langevin equation formalism proposed by Medina-Noyola is used to calculate the long-time self-diffusion coefficient Dsl of charged spherical Brownian particles as function of their charge Q0 and volume fraction ϕ, and of the salt concentration ns. The effects of self-friction and of electrolyte friction are considered simultaneously. The combined action of the Debye–Hückel screening of the interparticle interaction potential and of the electrolyte friction is found to result in a non-monotonic behavior of Dsl as function of ns, for typical values of ϕ and Q0.

Keywords: Brownian motion; Tracer diffusion; Electrolyte friction; Colloidal suspensions (search for similar items in EconPapers)
Date: 1999
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Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:268:y:1999:i:1:p:75-88

DOI: 10.1016/S0378-4371(99)00047-3

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