期刊
BIOELECTROCHEMISTRY
卷 87, 期 -, 页码 199-203出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.bioelechem.2011.12.001
关键词
Relative permittivity; Orientational ordering of water; Excluded volume effect; Cavity field; Saturation effect
资金
- Slovenian Research Agency (ARRS) [J3-2120, J1-4109, J1-4136, J3-4108, P2-0232]
The dipole moment of a water molecule in liquid water differs from that of an isolated one because each molecule is further polarized by the electric field of its neighbours. In this work a formula for the spatial dependence of the relative permittivity of an electrolyte near a highly charged surface is obtained in which the mutual influence of the water molecules is taken into account by means of the cavity field. The orientational ordering of water dipoles is considered in the saturation regime. It is predicted that the relative permittivity of an electrolyte solution near the highly charged surface (i.e. in saturation regime) may be substantially decreased due to orientational ordering of water (saturation effect) and depletion of water molecules (excluded volume effect) due to accumulation of counterions. (C) 2011 Elsevier B.V. All rights reserved.
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