Excluded volume effect and orientational ordering near charged surface in solution of ions and Langevin dipoles

Ales Iglic; Ekaterina Gongadze; Klemen Bohinc

doi:10.1016/j.bioelechem.2010.05.003

Excluded volume effect and orientational ordering near charged surface in solution of ions and Langevin dipoles

Bioelectrochemistry. 2010 Oct;79(2):223-7. doi: 10.1016/j.bioelechem.2010.05.003. Epub 2010 May 31.

Authors

Ales Iglic¹, Ekaterina Gongadze, Klemen Bohinc

Affiliation

¹ Laboratory of Biophysics, Faculty of Electrical Engineering, University of Ljubljana, Trzaska 25, SI-1000 Ljubljana, Slovenia. ales.iglic@fe.uni-lj.si

PMID: 20678740
DOI: 10.1016/j.bioelechem.2010.05.003

Abstract

The influence of a finite volume of ions and orientational ordering of water Langevin dipoles on the dielectric permittivity profile in the vicinity of charged surface is studied theoretically via a numerical solution of the modified Poisson-Boltzmann equation. It is shown that the dielectric permittivity profile close to the charged surface is mainly determined by two mechanisms; specifically, the depletion of dipoles at the charged surface due to accumulated counterions and the increased orientational ordering of the water dipoles.

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Algorithms
Electrochemistry
Electrolytes / chemistry*
Ions / chemistry
Models, Chemical
Poisson Distribution
Solutions / chemistry
Static Electricity*
Water / chemistry*

Substances

Electrolytes
Ions
Solutions
Water