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A simple classical model for predicting onset crystallization temperatures on curved substrates and its implications for phase transitions in confined volumes.

Cooper, S.J. and Nicholson, C.E. and Liu, J. (2008) 'A simple classical model for predicting onset crystallization temperatures on curved substrates and its implications for phase transitions in confined volumes.', Journal of chemical physics., 129 (12). p. 124715.

Abstract

For small confinement volumes, phase transition temperatures are determined by the scarcity of the crystallizing material, rather than the magnitude of the energy barrier, as the supply of molecules undergoing the phase transition can be depleted before a stable nucleus is attained. We show this for the case of crystallization from the melt and from the solution by using a simple model based on an extended classical nucleation theory. This has important implications because it enables a simple and direct measurement of the critical nucleus size in crystallization. It also highlights that predicting the observable melting points of nanoparticles by using the Gibbs–Thomson equation can lead to substantial errors.

Item Type:Article
Keywords:Crystallisation, melting, Nanoparticles, Nucleation, Phase transformations.
Full text:PDF - Published Version (634Kb)
Status:Peer-reviewed
Publisher Web site:http://dx.doi.org/10.1063/1.2977993
Publisher statement:Copyright (2008) American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in Cooper, S.J. and Nicholson, C.E. and Liu, J. (2008) 'A simple classical model for predicting onset crystallization temperatures on curved substrates and its implications for phase transitions in confined volumes.', Journal of chemical physics., 129 (12). p. 124715 and may be found at http://dx.doi.org/10.1063/1.2977993
Record Created:29 Oct 2012 16:50
Last Modified:02 Nov 2012 13:15

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