Reactions in cluster-surface collisions

Pamela M. St. John, Rainer D. Beck, Robert L. Whetten

Research output: Contribution to journalArticlepeer-review

49 Scopus citations

Abstract

We provide the first report of a reaction process occurring during the collision between a cluster and a solid surface. Scattering of alkali fluoride clusters composed of >60 atoms from silicon at hyperthermal energies (0.10.5 eV/atom) leads to efficient F- transfer reactions. The reaction probability approaches one-half for large clusters and newly etched Si(111)-H, following heating to desorb hydrogen. The abrupt size threshold implicates a collective mechanism, such as a shock wave in the impacting cluster.

Original languageEnglish (US)
Pages (from-to)1467-1470
Number of pages4
JournalPhysical Review Letters
Volume69
Issue number9
DOIs
StatePublished - 1992
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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