THERMODYNAMICS OF THE CURVATURE EFFECT ON ICE SURFACE-TENSION AND NUCLEATION THEORY

Authors
Citation
A. Bogdan, THERMODYNAMICS OF THE CURVATURE EFFECT ON ICE SURFACE-TENSION AND NUCLEATION THEORY, The Journal of chemical physics, 106(5), 1997, pp. 1921-1929
Citations number
44
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Physics, Atomic, Molecular & Chemical
ISSN journal
0021-9606
Volume
106
Issue
5
Year of publication
1997
Pages
1921 - 1929
Database
ISI
SICI code
0021-9606(1997)106:5<1921:TOTCEO>2.0.ZU;2-M
Abstract
The Gibbs model of surface tension, together with the approach by Defa y and Prigogine [Surface Tension and Adsorption (Longmans, New York/Lo ndon, 1966)] and Dufour and Defay(1,2) [Thermodynamic of Clouds (Acade mic, New York/London, 1963)] for calculation of the Gibbs adsorption G amma, is used to estimate the curvature effect on ice surface tension. For the case of the ice-water interfaces a new model for calculation of the Gibbs adsorption Gamma(i/w) is proposed. Ice surface tension de creases with the curvature which in turn reduces the equilibrium radiu s of an ice embryo thus making the nucleation event more probable. The comparison of the calculated transitional region between ice and supe rcooled water with that obtained from experiments and theoretical calc ulations showed that the proposed new model gives the correct sign and correct order of magnitude for Gamma(i/w). (C) 1997 American Institut e of Physics.