Oscillatory behavior in the size dependence of cluster mobility on metal surfaces: Rh on Rh(100)

Journal Article · Mon Sep 26 00:00:00 EDT 1994 · Physical Review Letters; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.73.1833· OSTI ID:7020103

Kellogg, G L ^[1]

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1. Sandia National Laboratories, Albuquerque, New Mexico 87185-0344 (United States)

The mobility of Rh clusters containing two to twelve atoms adsorbed on the Rh(100) plane is examined by field ion microscopy. The activation energy of surface diffusion exhibits an interesting, oscillatory behavior as a function of cluster size. Compact geometric structures (squares and rectangles) have a consistently higher activation energy than structures with extra atoms at the periphery. The atomic-level mechanism involved in cluster diffusion is inferred from a comparison of the measured activation energies to previous theoretical calculations.

• DOE Contract Number: AC04-94AL85000
• OSTI ID: 7020103
• Journal Information: Physical Review Letters; (United States), Journal Name: Physical Review Letters; (United States) Vol. 73:13; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360101* -- Metals & Alloys-- Preparation & Fabrication
360104 -- Metals & Alloys-- Physical Properties
ACTIVATION ENERGY
ADSORPTION
ATOMIC CLUSTERS
CRYSTAL GROWTH
DIFFUSION
ELEMENTS
ENERGY
ION MICROSCOPY
METALS
MICROSCOPY
MOBILITY
MORPHOLOGY
PLATINUM METALS
RHODIUM
SORPTION
TRANSITION ELEMENTS