Issue 32, 2012

Differential capacitance of liquid/liquid interfaces of finite thicknesses: a finite element study

Abstract

Finite element simulations were used to investigate the effect of a smooth variation of permittivity across a polarized liquid/liquid interface on the differential capacitance. The results show that a relative permittivity profile can account for the variation of ion solvation in the interfacial region, and therefore upon the diffuse double layer itself. The width and the symmetry of this profile across the interface are shown to be crucial parameters for interfacial distributions and fitting of capacitance data has been used to estimate the width of the interfacial region.

Graphical abstract: Differential capacitance of liquid/liquid interfaces of finite thicknesses: a finite element study

Supplementary files

Article information

Article type
Communication
Submitted
04 May 2012
Accepted
25 Jun 2012
First published
26 Jun 2012

Phys. Chem. Chem. Phys., 2012,14, 11268-11272

Differential capacitance of liquid/liquid interfaces of finite thicknesses: a finite element study

D. Momotenko, C. M. Pereira and H. H. Girault, Phys. Chem. Chem. Phys., 2012, 14, 11268 DOI: 10.1039/C2CP41437F

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