Determination of Na submonolayer adsorption site on Cu(111) by low-energy ion blocking

Journal Article · Sat Sep 15 04:00:00 EDT 2007 · Physical Review. B, Condensed Matter and Materials Physics

DOI:https://doi.org/10.1103/PHYSREVB.76.113407· OSTI ID:21055158

Zhang, R; Makarenko, B ^[1]; Bahrim, B ^[2]; Rabalais, J W ^[1]

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1. Department of Chemistry, University of Houston, Houston, Texas 77204 (United States)
2. Department of Chemistry and Physics, Lamar University, Beaumont, Texas 77710 (United States)

The structure of a submonolayer coverage of sodium adsorbed on a Cu(111) surface at room temperature has been investigated using time-of-flight scattering and recoiling spectrometry. The effect of the adsorbed Na atoms on the angular distribution of scattered 2 keV H{sup +} ions is analyzed by molecular dynamics and scattering and recoiling imaging code simulations. It is shown that at a coverage {theta}=0.25 monolayer, Na atoms preferentially populate the fcc threefold surface sites with a height of 2.7{+-}0.1 A above the first-layer Cu atoms. At a lower coverage of {theta}=0.10 ML, there is no adsorption site preference for the Na atoms on the Cu(111) surface.

• OSTI ID: 21055158
• Journal Information: Physical Review. B, Condensed Matter and Materials Physics, Journal Name: Physical Review. B, Condensed Matter and Materials Physics Journal Issue: 11 Vol. 76; ISSN 1098-0121
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ADSORPTION
ANGULAR DISTRIBUTION
COPPER
FCC LATTICES
HYDROGEN IONS 1 PLUS
ION CHANNELING
KEV RANGE 01-10
LAYERS
MOLECULAR DYNAMICS METHOD
SCATTERING
SIMULATION
SODIUM
SPECTRA
SPECTROSCOPY
SURFACES
TEMPERATURE RANGE 0273-0400 K
TIME-OF-FLIGHT METHOD