Identification of reconstruction in Pt films deposited on Pd(110) at room temperature
- Department of Chemistry and Ames Laboratory, Iowa State University, Ames, Iowa 50011 (United States)
We have studied the properties of Pt films on Pd(110), grown by deposition at 300 K and annealed up to 900 K, using low-energy electron diffraction and Auger-electron spectroscopy. We observe (1{times}2) and (1{times}3) superstructures, depending upon Pt coverage and annealing temperature. At one monolayer, the (1{times}1) periodicity is unperturbed. Between one and three monolayers, a broad and streaky (1{times}2) develops upon annealing, then fades to (1{times}1) as the film dissolves. At three monolayers and above, the broad and streaky (1{times}2) splits to a (1{times}3), then fades again to (1{times}1) at high temperature. Adsorption of CO causes (1{times}3){r arrow}(1{times}1) reversion at relatively low temperature, 430 K. Based upon the known behavior of Pt(110) reconstructions, this is strong evidence that the (1{times}3) structure of the Pt film is a surface reconstruction.
- DOE Contract Number:
- W-7405-ENG-82
- OSTI ID:
- 5654914
- Journal Information:
- Physical Review, B: Condensed Matter; (United States), Journal Name: Physical Review, B: Condensed Matter; (United States) Vol. 44:24; ISSN 0163-1829; ISSN PRBMD
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
360101 -- Metals & Alloys-- Preparation & Fabrication
360102* -- Metals & Alloys-- Structure & Phase Studies
ADSORPTION
AMBIENT TEMPERATURE
ANNEALING
AUGER EFFECT
CARBON COMPOUNDS
CARBON MONOXIDE
CARBON OXIDES
CHALCOGENIDES
COHERENT SCATTERING
DEPOSITION
DIFFRACTION
ELECTRON DIFFRACTION
ELEMENTS
EPITAXY
FILMS
HEAT TREATMENTS
METALS
OXIDES
OXYGEN COMPOUNDS
PALLADIUM
PLATINUM
PLATINUM METALS
SCATTERING
SORPTION
SURFACE COATING
THIN FILMS
TRANSITION ELEMENTS
VACUUM COATING