Monitoring super- and subsurface oxygen on Ag(210) by high energy resolution X-ray photoelectron spectroscopy: Subsurface diffusion and segregation (Articolo in rivista)

Type
Label
  • Monitoring super- and subsurface oxygen on Ag(210) by high energy resolution X-ray photoelectron spectroscopy: Subsurface diffusion and segregation (Articolo in rivista) (literal)
Anno
  • 2006-01-01T00:00:00+01:00 (literal)
Alternative label
  • Savio L., Gerbi A., Vattuone L., Baraldi A., Comelli G., and Rocca M. (2006)
    Monitoring super- and subsurface oxygen on Ag(210) by high energy resolution X-ray photoelectron spectroscopy: Subsurface diffusion and segregation
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Savio L., Gerbi A., Vattuone L., Baraldi A., Comelli G., and Rocca M. (literal)
Pagina inizio
  • 942 (literal)
Pagina fine
  • 947 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 110 (literal)
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • CNR, IMEM, I-16146 Genoa, Italy; Dipartimento Fis, I-16146 Genoa, Italy; Univ Trieste, CENMAT, I-34127 Trieste, Italy; INFM, Lab TASC, I-34012 Trieste, Italy (literal)
Titolo
  • Monitoring super- and subsurface oxygen on Ag(210) by high energy resolution X-ray photoelectron spectroscopy: Subsurface diffusion and segregation (literal)
Abstract
  • We report on a high energy resolution X-ray photoelectron spectroscopy plus supersonic molecular beam investigation of O/Ag(210). Two components are detected in the O1s spectra upon O-2 adsorption, at binding energies E-B =527.7 and 529.6 eV. The former peak persists up to 470 K, while the latter one decreases abruptly above 280 K. Comparison with a previous vibrational spectroscopy investigation on the same system (L. Vattuone, et al. Phys. Rev. Lett. 2003, 90, 228302) allows to assign both features to atomic oxygen. The low-energy peak is identified with adatoms, while the other is correlated to O atoms in subsurface sites. A minor contribution at the same binding energy, due to carbonates, is quantified by inspection of the C1s region and shows a different temperature behavior with respect to oxygen. Oxygen segregation into the subsurface region is observed when heating the crystal in the presence of supersurface oxygen. (literal)
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