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Superheating and supercooling of Ge nanocrystals embedded in SiO2

Xu, Q; Sharp, I D; Yuan, C W; Liao, C Y; Glaeser, Andreas M; Minor, A M; Beeman, J W; Ridgway, Mark C; Kluth, Patrick; Ager, J W; Chrzan, D C; Haller, E E

Description

Free-standing nanocrystals exhibit a size-dependant thermodynamic melting point reduction relative to the bulk melting point that is governed by the surface free energy. The presence of an encapsulating matrix, however, alters the interface free energy of nanocrystals and their thermodynamic melting point can either increase or decrease relative to bulk. Furthermore, kinetic contributions can significantly alter the melting behaviours of embedded nanoscale materials. To study the effect of an...[Show more]

CollectionsANU Research Publications
Date published: 2007
Type: Journal article
URI: http://hdl.handle.net/1885/49541
Source: Journal of Physics: Conference Series
DOI: 10.1088/1742-6596/61/1/206

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