New ballistically and thermally activated exchange processes in the vapor deposition of Au on Ag(111): a molecular dynamics study
Autor: | Michael I. Haftel, Mervine Rosen |
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Rok vydání: | 1998 |
Předmět: |
Surface diffusion
Chemistry Interatomic potential Surfaces and Interfaces Chemical vapor deposition Substrate (electronics) Condensed Matter Physics Surfaces Coatings and Films Molecular dynamics Transition metal Chemical physics Materials Chemistry Deposition (phase transition) Physical chemistry Diffusion (business) |
Zdroj: | Surface Science. 407:16-26 |
ISSN: | 0039-6028 |
DOI: | 10.1016/s0039-6028(98)00067-3 |
Popis: | Diffusion processes of Au on Ag(111) are examined by molecular dynamics calculations using surface-embedded-atom potentials. We find that complex forms of exchange diffusion dominate the early deposition. The usual direct AuAg exchange is unlikely, but more complicated exchange mechanisms involving multiple substrate atoms and catalyzed by nearby adatoms or clusters have very low activation barriers. These highly collective exchange processes can be activated ballistically by an incoming adatom or thermally on surfaces well below room temperature. |
Databáze: | OpenAIRE |
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