Core-level spectroscopy of the Pd/W(110) interface: Evidence of long-range Pd-island-W interactions at submonolayer Pd coverages
- Title
- Core-level spectroscopy of the Pd/W(110) interface: Evidence of long-range Pd-island-W interactions at submonolayer Pd coverages
- Date Issued
- 2009-04
- Publisher
- ELSEVIER SCIENCE BV
- Abstract
- We have measured W 4f(7/2) core-level photoemission spectra from W(110) in the presence of Pd overlayers for coverages up to similar to 1 pseudomorphic monolayer (ML). At coverages close to 0.05 ML a striking change in the W core-level spectrum is observed, which we interpret as indicating a long-range lateral effect of 2D Pd islands upon the W electronic structure in both the first and second W layers. As the coverage increases the long-range effect weakens and finally vanishes near 0.85 ML Above this coverage the W spectra are typical for a W-based bimetallic interface, with the first-layer W atoms exhibiting a small interfacial core-level shift (-95 +/- 5 meV) compared to the bulk atoms. (C) 2009 Elsevier B.V. All rights reserved.
- Keywords
- Bimetallic surfaces; Palladium; Soft X-ray photoelectron spectroscopy; Surface electronic structure; Tungsten; ULTRATHIN METAL-FILMS; ADATOM-ADATOM INTERACTIONS; FIELD-ION MICROSCOPE; ELECTRONIC-STRUCTURE; ADSORBATE INTERACTIONS; TUNGSTEN SURFACES; THIN-FILMS; PHOTOELECTRON DIFFRACTION; BIMETALLIC SURFACES; PALLADIUM MONOLAYER
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/29021
- DOI
- 10.1016/J.SUSC.2009.
- ISSN
- 0039-6028
- Article Type
- Article
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- There are no files associated with this item.
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