Directed assembly of Au and Fe nanoparticles on a TiOx/Pt(111) ultrathin template: the role of oxygen affinity (Articolo in rivista)

Type
Label
  • Directed assembly of Au and Fe nanoparticles on a TiOx/Pt(111) ultrathin template: the role of oxygen affinity (Articolo in rivista) (literal)
Anno
  • 2009-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1039/b915641k (literal)
Alternative label
  • Cavaliere E., Kholmanov I., Gavioli L., Sedona F. , Agnoli S. , Granozzi G. , Barcaro G. , Fortunelli A. (2009)
    Directed assembly of Au and Fe nanoparticles on a TiOx/Pt(111) ultrathin template: the role of oxygen affinity
    in PCCP. Physical chemistry chemical physics (Print); The Royal Society of Chemistry, Cambridge (Regno Unito)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Cavaliere E., Kholmanov I., Gavioli L., Sedona F. , Agnoli S. , Granozzi G. , Barcaro G. , Fortunelli A. (literal)
Pagina inizio
  • 11305 (literal)
Pagina fine
  • 11309 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 11 (literal)
Rivista
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • Istituto per i Processi Chimico-Fisici (IPCF) del CNR, Via Giuseppe Moruzzi 1, I-56124 Pisa, Italy Dipartimento di Matematica e Fisica, Universita` Cattolica del Sacro Cuore, via dei Musei 41, I-25121 Brescia, Italy (literal)
Titolo
  • Directed assembly of Au and Fe nanoparticles on a TiOx/Pt(111) ultrathin template: the role of oxygen affinity (literal)
Abstract
  • The essential role of O affinity in the directed assembly of size-selected Au and Fe nanoparticles (NPs) on a TiOx/Pt(111) ultrathin oxide phase, an effective template for size selected metal NP growth, is revealed through scanning tunneling microscopy and density-functional calculations. A weakly interacting element (Au) diffuses rapidly and gets trapped in the vacancy defects (picoholes) located inside parallel rows (troughs, spaced 1.44 nm apart) peculiar to the film structure, producing size-selected NPs arranged in regular linear arrays aligned along the troughs. In contrast, an element with greater O affinity (Fe) experiences higher diffusion barriers, and the growth is dominated by kinetic effects, with a less effective preferential nucleation and the appearance of irregular NP morphologies. (literal)
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