| Issue |
Europhys. Lett.
Volume 74, Number 5, June 2006
|
|
|---|---|---|
| Page(s) | 854 - 860 | |
| Section | Condensed matter: structural, mechanical and thermal properties | |
| DOI | https://doi.org/10.1209/epl/i2006-10030-0 | |
| Published online | 26 April 2006 | |
Surface tension of electrolyte solutions: Comparing the effects of ionic dispersion forces and solvation
Department of Applied Mathematics, Research School of Physical Sciences and Engineering, Australian National University - ACT 0200, Australia
Received:
12
January
2006
Accepted:
30
March
2006
The influence of salt on the surface tension of water is yet to be understood. We derive
approximate analytical expressions for the influence of two different ion-specific effects on
the surface tension of an electrolyte: the dispersion interaction between the ions and
the air-water interface, and the change in solvation energy of the ions as they approach the
interface. These formulae provide a simple means of comparing the relative
importance of the two effects. We carry out such a comparison for the case of 1
, and find that solvation is the dominant effect.
PACS: 68.03.Cd – Surface tension and related phenomena / 82.45.Gj – Electrolytes
© EDP Sciences, 2006
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