Identification of reconstruction in Pt films deposited on Pd(110) at room temperature | Zendy

P. J. Schmitz | Zendy; W.Y. Leung | Zendy; H. C. Kang | Zendy; P. A. Thiel | Zendy

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Identification of reconstruction in Pt films deposited on Pd(110) at room temperature

Author(s) -

P. J. Schmitz,

W.Y. Leung,

H. C. Kang,

P. A. Thiel

Publication year - 1991

Publication title -

physical review. b, condensed matter

Language(s) - English

Resource type - Journals

eISSN - 1095-3795

pISSN - 0163-1829

DOI - 10.1103/physrevb.44.13734

Subject(s) - monolayer , annealing (glass) , physics , auger electron spectroscopy , electron diffraction , low energy electron diffraction , crystallography , condensed matter physics , materials science , diffraction , nanotechnology , optics , quantum mechanics , thermodynamics , chemistry

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.

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