MODELING METALLIC CLUSTER GROWTH IN GASES

D.A. Eastham
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D.A. Eastham: DRAL, Daresbury Laboratory, Daresbury, Warrington WA4 4AD, UK

Surface Review and Letters (SRL), 1996, vol. 03, issue 01, 55-58

Abstract: The abundance of metal clusters from a gas aggregation source can be calculated using statistical techniques or by direct mechanistic models which average over all the molecular dynamics. The advantage of the latter models is that nonequilibrium situations can be calculated including temporal variations in volume and temperature. By direct modeling of the collisions between all the cluster sizes, a universal equation for the rate of formation of clusters in terms of a dimensionless time parameter can be constructed. The equation is used to compute cluster abundances from cold collisions in two different situations; one in which the monomer concentration is kept constant and another where the monomer is depleted in the buffer gas stream.

Date: 1996
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DOI: 10.1142/S0218625X96000139

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