Surface tension and ion transfer across the interface of two immiscible electrolytes

C. G. Verdes, M. Urbakh, A. A. Kornyshev*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

15 Scopus citations


We explore the surface polaron mechanism of ion transport across the interface of two immiscible electrolytes by numerical simulations of the coupled nonlinear Langevin equations of the "2d-Kramers-like" theory of Kornyshev-Kuznetsov-Urbakh [J. Chem. Phys. 117 (2002) 6766]. A dependence of ion transfer rate on the diffusion coefficients of ion and interfacial protrusion and on interfacial tension has been investigated. In the case of strong coupling between the motions of the ion and the interface (large interfacial tension), our results reproduce the analytical limiting laws attained in this theory and also approve the suggested interpolation formula for the effective diffusion constant. The results are, however, very different in the cases of moderate and weak coupling (moderate and small interfacial tension). Possible experimental verification of the predicted effects is discussed.

Original languageEnglish
Pages (from-to)693-699
Number of pages7
JournalElectrochemistry Communications
Issue number7
StatePublished - Jul 2004


FundersFunder number
Leverhulme TrustNF/07 058/P
Royal Society
Israel Science Foundation573/00


    • ITIES
    • Ion transfer
    • Stochastic transport
    • Surface tension


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