Journal
BIOELECTROCHEMISTRY
Volume 79, Issue 2, Pages 223-227Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.bioelechem.2010.05.003
Keywords
Membrane electrochemistry; Langevin dipoles; Excluded volume effect; Dielectric permittivity; Orientational ordering
Funding
- ARRS [J3-9219-0381, P2-0232-1538]
- DFG [1505/1]
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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. (C) 2010 Elsevier B.V. All rights reserved.
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