Self-Diffusion Along Step-Bottoms on Pt(111)

Journal Article · Mon Apr 05 00:00:00 EDT 1999 · Physical Review B

DOI:https://doi.org/10.1103/PhysRevB.60.4972· OSTI ID:5667

Feibelman, P J ^[1]

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1. Sandia National Laboratories

First-principles total energies of periodic vicinals are used to estimate barriers for Pt-adatom diffusion along straight and kinked steps on Pt(111), and around a corner where straight steps intersect. In all cases studied, hopping diffusion has a lower barrier than concerted substitution. In conflict with simulations of dendritic Pt island formation on Pt(111), hopping from a corner site to a step whose riser is a (111)-micro facet is predicted to be more facile than to one whose riser is a (100).

• Research Organization: Sandia National Labs., Albuquerque, NM (US); Sandia National Labs., Livermore, CA (US)
• Sponsoring Organization: US Department of Energy (US)
• DOE Contract Number: AC04-94AL85000
• OSTI ID: 5667
• Report Number(s): SAND99-0845J
• Journal Information: Physical Review B, Journal Name: Physical Review B
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CRYSTAL STRUCTURE
DENDRITES
PLATINUM
SELF-DIFFUSION