Small Au clusters on a defective MgO(100) surface (Articolo in rivista)

Type
Label
  • Small Au clusters on a defective MgO(100) surface (Articolo in rivista) (literal)
Anno
  • 2008-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1016/j.cplett.2008.03.077 (literal)
Alternative label
  • Barcaro G., Fortunelli A. (2008)
    Small Au clusters on a defective MgO(100) surface
    in Chemical physics letters (Print); ELSEVIER SCIENCE BV, PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS, AMSTERDAM (Paesi Bassi)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Barcaro G., Fortunelli A. (literal)
Pagina inizio
  • 143 (literal)
Pagina fine
  • 147 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 456 (literal)
Rivista
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#pagineTotali
  • 5 (literal)
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • IPCF-CNR (literal)
Titolo
  • Small Au clusters on a defective MgO(100) surface (literal)
Abstract
  • The lowest energy structures of small Au_N clusters (N = 4, 6, 8, 10) adsorbed on an MgO(100) terrace presenting a double vacancy (DV) neutral defect are investigated via a Density-Functionl Basin-Hopping (DF-BH) approach. Gas-phase gold clusters in this size range exhibit planar structures, while a crossover from planar to cage structural motifs takes place between size 8 and 10 when the clusters are adsorbed on the defected surface. A fluxional behavior is found with different structural motifs very close in energy, in agreement with the co-existence of different epitaxies observed in Molecular Beam Epitaxy experiments on larger clusters. Au_6, that is energetically favored in the gas-phase with respect to neighboring sizes thanks to an electronic shell-closure effect, presents a reduced HOMO-LUMO gap, and its stability is comparable to that of other even clusters. (literal)
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