Surface structures of S on Pd(111)

Autor(en): Speller, S
Rauch, T
Bomermann, J
Borrmann, P
Heiland, W
Stichwörter: ADSORBATE STRUCTURE; chemisorption; Chemistry; Chemistry, Physical; low energy electron diffraction (LEED); palladium; Physics; Physics, Condensed Matter; scanning tunneling microscopy; SCANNING-TUNNELING-MICROSCOPY; SULFUR; surface segregation; surface structure, morphology, roughness and topography; SYSTEMS; X-ray photoelectron spectroscopy
Erscheinungsdatum: 1999
Herausgeber: ELSEVIER
Journal: SURFACE SCIENCE
Volumen: 441
Ausgabe: 1
Startseite: 107
Seitenende: 116
Zusammenfassung: 
S is adsorbed on Pd(111) from the gas phase using H2S as `carrier' gas. After adsorption at room temperature a (root 3 x root 3)R30 degrees LEED pattern is observed. Using STM coexisting (root 3 x root 3)R30 degrees, (root 7 x root 7)R19.1 degrees (2 x 2) stripes, (2 x 2) triangles and disordered S structures are found. Annealing favors the formation of (root 7 x root 7)R19.1 degrees areas on the surface. The structures, produced by H2S adsorption are compared with S structures produced by segregation. A detailed model for the (root 7 x root 7)R19.1 degrees is developed on the basis of AES and XPS data and FLAPW calculations. (C) 1999 Elsevier Science B.V. All rights reserved.
ISSN: 00396028
DOI: 10.1016/S0039-6028(99)00808-0

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