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
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.