Copper overlayers on rhenium(0001)
- Texas A M Univ., College Station (USA)
The interaction of Cu overlayers with a Re(0001) surface has been studied by low-energy electron diffraction (LEED), Auger electron spectroscopy (AES), thermal desorption spectroscopy (TDS), and electron energy loss spectroscopy (ELS). The thermal desorption spectra of Cu from Re(0001) indicate two desorption peaks, designated as {beta}{sub 1} and {beta}{sub 2} states. The {beta}{sub 1} state begins to appear upon saturation of the {beta}{sub 2} state. Both states follow approximate zero-order kinetics. The activation energy for the {beta}{sub 1} and {beta}{sub 2} states is estimated from TD spectra to be {approx} 74 and {approx} 93 kcal/mol, respectively. AES measurements show that with Cu coverages less than 2 monolayers (ML), the Cu to Re AES ratios remain constant upon annealing to 1000 K. At higher coverages of Cu, the Cu/Re AES ratios decrease when annealed between 110 and 900 K, consistent with the formation of 3-D Cu clusters. Some Cu nucleation appears to take place during the deposition at 110 K. Several surface phases are observed by LEED following Cu deposition at 110 K and subsequent annealing.
- OSTI ID:
- 6665124
- Journal Information:
- Journal of Physical Chemistry; (USA), Journal Name: Journal of Physical Chemistry; (USA) Vol. 94:4; ISSN 0022-3654; ISSN JPCHA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
400200* -- Inorganic
Organic
& Physical Chemistry
AUGER ELECTRON SPECTROSCOPY
BIMETALS
CALCULATION METHODS
COHERENT SCATTERING
COPPER
DATA
DATA ANALYSIS
DIFFRACTION
ELECTRON DIFFRACTION
ELECTRON SPECTROSCOPY
ELEMENTS
EXPERIMENTAL DATA
INFORMATION
KINETICS
MEASURING INSTRUMENTS
MEASURING METHODS
METALS
NUMERICAL DATA
REACTION KINETICS
RHENIUM
SCATTERING
SPECTROSCOPY
SURFACE PROPERTIES
TRANSITION ELEMENTS