6533b823fe1ef96bd127e257
RESEARCH PRODUCT
Watching adsorption and electron beam induced decomposition on the model system Mo(CO)(6)/Cu(111) by X-ray absorption and photoemission spectroscopies
Emiliano FondaPierre PaufertZhongshan LiSylvie BourgeoisBruno Domenichinisubject
Annealing (metallurgy)General Physics and Astronomychemistry.chemical_elementSurfaces and InterfacesGeneral ChemistryCondensed Matter PhysicsMolybdenum hexacarbonylSurfaces Coatings and FilmsMetalCrystallographychemistry.chemical_compoundAdsorptionPhysisorptionchemistryMolybdenumvisual_artMonolayerElectron beam processingvisual_art.visual_art_mediumPhysical chemistrydescription
Abstract An in-depth study of the first steps of electron beam assisted growth of Mo from molybdenum hexacarbonyl on Cu(1 1 1) has been carried out exploiting the complementarity of X-ray photoemission and X-ray absorption spectroscopies. Frank van der Merwe (2D) growth mode has been observed for the completion of the two first monolayers of adsorbed molecules through a simple physisorption process. Irradiation of the Mo(CO)6 deposit by 1 keV electron beam induces a modification of molybdenum coordination, the average number of C-neighbors decreasing from 6 to 3. Decomposed molecules remain on the surface after annealing at 520 K and organize themselves, the molybdenum atoms moving in Cu(1 1 1) surface fcc hollow sites. After annealing at 670 K, metallic molybdenum growth begins, if the total amount of adsorbed Mo atoms exceeds 1.2 monolayers.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2013-11-01 |