X-ray photoelectron diffraction of Ni(110)-2 × 1-CO p2mg layer

Autor:	O. Knauff, V. Fritzsche, H.P. Bonzel, U. Grosche
Rok vydání:	1992
Předmět:	Diffraction chemistry.chemical_classification Forward scatter Scattering Intermolecular force Biophysics Condensed Matter Physics Crystallography chemistry Intramolecular force X-ray crystallography Physical and Theoretical Chemistry Anisotropy Molecular Biology Inorganic compound
Zdroj:	Molecular Physics. 76:787-805
ISSN:	1362-3028 0026-8976
DOI:	10.1080/00268979200101681
Popis:	The ordered adsorbed CO layer of (2 × 1) p2mg symmetry on a Ni(110) surface was studied by X-ray photoelectron diffraction over a polar angle range Θ = ± 85° and for four different azimuthal orientations. Forward scattering enhancement peaks in the C 1s photoelectron intensity were detected at various angles, being due to intramolecular as well as intermolecular scattering. In particular, strong intermolecular scattering peaks were found at ± 68° along the [001] azimuthal direction. The anisotropy in intensity is about 46% compared to 67% for the intramolecular scattering peak at ±21°. Multiple scattering calculations for different CO adsorbate configurations and binding sites on Ni(110) were performed. A comparison with the experimental data, corrected for the instrument function, supports the on-top binding site for CO and a linear Ni-C-O configuration. Thus, XPD has been used for the first time to evaluate adsorbate registry, in addition to the bond and molecule orientation.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::3f1266d8ef9abcb8478647042d628129 https://doi.org/10.1080/00268979200101681 Zobrazit plný text záznamu