Melting Point and Lattice Parameter Shifts in Supported Metal Nanoclusters
V.D. Borman, I.V. Tronin, V.N. Tronin, V.I. Troyan, O.S. Vasiliev,, P.V. Borisyuk, M.A. Pushkin
TL;DR
This paper presents a theoretical model explaining how the melting point and lattice parameters of supported metal nanoclusters change with size, emphasizing the role of van der Waals forces and vacancy mechanisms.
Contribution
It introduces a uniform theoretical approach and vacancy mechanism to explain size-dependent shifts in melting point and lattice parameters of nanoclusters, aligning with experimental data.
Findings
Van der Waals forces significantly influence melting point shifts.
Vacancy mechanisms explain lattice parameter changes.
Model agrees with experimental observations.
Abstract
The dependencies of the melting point and the lattice parameter of supported metal nanoclusters as functions of clusters height are theoretically investigated in the framework of the uniform approach. The vacancy mechanism describing the melting point and the lattice parameter shifts in nanoclusters with decrease of their size is proposed. It is shown that under the high vacuum conditions (p<10^-7 torr) the essential role in clusters melting point and lattice parameter shifts is played by the van der Waals forces of cluster-substrate interation. The proposed model satisfactorily accounts for the experimental data.
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