Initial Formation of Positively Charged Gold on MgO(001) Thin Films: Identification by Experiment and Structural Assignment by Theory

Autor:	Gianfranco Pacchioni, Matthew A. Brown, Hans-Joachim Freund, Yuichi Fujimori, Franziska Ringleb, Martin Sterrer, Gloria Preda
Přispěvatelé:	Brown, M, Ringleb, F, Fujimori, Y, Sterrer, M, Freund, H, Preda, G, Pacchioni, G
Rok vydání:	2011
Předmět:	General Energy X-ray photoelectron spectroscopy Chemistry supported clusters DFT calculations Nucleation Analytical chemistry Infrared spectroscopy Physical and Theoretical Chemistry Thin film Surfaces Coatings and Films Electronic Optical and Magnetic Materials
Zdroj:	The Journal of Physical Chemistry C. 115:10114-10124
ISSN:	1932-7455 1932-7447
DOI:	10.1021/jp201254s
Popis:	Infrared spectroscopy experiments using CO as a probe and X-rayphotoelectron spectroscopy were used to study the initial nucleation of gold on the surface of MgO(001)/Ag(001) thin films at 90 K. The most intense CO infrared signal observed at low gold coverage was at 2154 cm(-1), indicating the formation of positively charged Au species. Both infrared and photoemission data reveal details about the thermally induced sinter behavior of metallic and positively charged gold species on the MgO(001) surface. Density functional theory was used to examine different defect types on the MgO surface for their ability to form positively charged Au species and to assign the observed sites on the MgO(001) surface for their ability to form positively charged Au species and to assign the observed R stretch vibration to Au(n)(+)-CO species on specific binding sites on the MgO(001) surface.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::393e0e89a0a682a4e79cf31e9a111617 https://doi.org/10.1021/jp201254s Zobrazit plný text záznamu