Tuning the Stoichiometry of Surface Oxide Phases by Step Morphology:Ag(511)versusAg(210)

Autor:	Luca Vattuone, C. Giallombardo, Anton Kokalj, Letizia Savio, Mario Rocca
Rok vydání:	2008
Předmět:	Crystallography Materials science Octahedron chemistry Ab initio quantum chemistry methods Photoemission spectroscopy Phase (matter) Electron energy loss spectroscopy Nucleation General Physics and Astronomy chemistry.chemical_element Oxygen Stoichiometry
Zdroj:	Physical Review Letters. 101
ISSN:	1079-7114 0031-9007
DOI:	10.1103/physrevlett.101.266103
Popis:	We show by vibrational and photoemission spectroscopy and by ab initio calculations that in ultrahigh vacuum oxygen adsorption at stepped Ag surfaces causes the formation of surface oxide phases with different stoichiometry, depending on the morphology of the steps involved in the nucleation process. On Ag(511), characterized by close-packed steps and (100) terraces, subsurface O occupies tetrahedral interstitials and an Ag2O-like phase forms; on Ag(210), showing open step edges, subsurface oxygen ends up off center in octahedral sites and an AgO-like structure nucleates.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::62c8f6307c33ca68b9c4ec7ba56cb710 https://doi.org/10.1103/physrevlett.101.266103 Zobrazit plný text záznamu