Water polarization under thermal gradients

被引：102

作者：

Bresme, Fernando ^{[1
,2
]}

Lervik, Anders ^{[1
,3
]}

Bedeaux, Dick ^{[2
,3
]}

Kjelstrup, Signe ^{[2
,3
]}

机构：

[1] Univ London Imperial Coll Sci Technol & Med, Dept Chem, London SW7 2AZ, England

[2] Norwegian Acad Sci & Letters, Ctr Adv Study, Oslo, Norway

[3] Norwegian Univ Sci & Technol, Dept Chem, N-7034 Trondheim, Norway

来源：

PHYSICAL REVIEW LETTERS | 2008年 / 101卷 / 02期

关键词：

D O I：

10.1103/PhysRevLett.101.020602

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We investigate the response of bulk liquid water to a temperature gradient using nonequilibrium molecular dynamics simulations. It is shown that the thermal gradient polarizes water in the direction of the gradient, leading to a non-negligible electrostatic field whose origin lies in the water reorientation under nonequilibrium conditions. The dependence of the magnitude of the electrostatic field with the temperature gradient is in agreement with nonequilibrium thermodynamics theory. We conclude that temperature gradients of the order of 10(8) K/m could result in fairly large polarizations similar to 10(6) V/m.

引用

页数：4

共 22 条

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