Melting Point Shift in Supported Metal Nanoclusters

The dependency of the melting point of supported metal nanoclusters as function of clusters height is theoretically investigated in the framework of the uniform approach. The vacancy mechanism describing the melting point shift in nanoclusters with decrease of their size is proposed. It is shown tha...

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Bibliographic Details
Published in:arXiv.org 2010-07
Main Authors: Borman, V D, Borisyuk, P V, Pushkin, M A, Tronin, I V, Tronin, V N, Troyan, V I, Vasiliev, O S, Vitovskaya, M V
Format: Article
Language:English
Subjects:
Clusters
Dependence
Melting
Melting points
Nanoclusters
Substrates
Van der Waals forces
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Summary:The dependency of the melting point of supported metal nanoclusters as function of clusters height is theoretically investigated in the framework of the uniform approach. The vacancy mechanism describing the melting point shift in nanoclusters with decrease of their size is proposed. It is shown that the essential role in clusters melting point shift is played by van der Waals forces of cluster-substrate interaction. It is shown, that the account of layer--by--layer fusion of a cluster allows to satisfactorily describe the melting of nanoclusters of various metals, deposited onto a different substrates. The proposed model satisfactorily accounts for the experimental data.
ISSN:2331-8422