VSE knjižnice (vzajemna bibliografsko-kataložna baza podatkov COBIB.SI)
  • Selenium adsorption at different coverages on Fe(1 0 0) and Fe(1 1 1) : a DFT study
    Cardoso Schwindt, V. ...
    Se adsorption on Fe(1 0 0) and (1 1 1) surfaces is examined using the density functional theory (DFT). Selenium is adsorbed in a distorted bridge on the (1 1 1) surface while in the (1 0 0) surface ... it prefers a 4-fold hollow site, with energies of -10.36 and -5.25 eV, respectively. Se adsorption results in surface reconstruction. There is some contraction in the case of the (1 0 0) plane for 1/4 and 1/2 ML coverage and some relaxation at 1 ML (4.5%). Contraction increases to 15% for the (1 1 1) plane at 1/4 ML. At a higher coverage, there is a non-regular movement of surface metal atoms, and there is almost no change at 1 ML. The magnetic moment for surface Fe atoms decreases with coverage. The most important changes are in the (1 0 0) plane, followed by the (1 1 0) and then the (1 1 1) planes with a reduction of 52%, 24% and 7% respectively. The density of states presents a contribution of Se states at -5.0 and -13.1 eV, when stabilized after adsorption. The Fe-Fe bond weakening is higher in the (1 0 0) plane. Fe-Se bonds are formed at the expense of the metallic bond.
    Vir: Applied Surface Science. - ISSN 0169-4332 (Vol. 315, Oct. 2014, str. 252-260)
    Vrsta gradiva - članek, sestavni del ; neleposlovje za odrasle
    Leto - 2014
    Jezik - angleški
    COBISS.SI-ID - 1062826

    Povezava(-e):

    http://www.sciencedirect.com/science/article/pii/S0169433214016596
    DOI

vir: Applied Surface Science. - ISSN 0169-4332 (Vol. 315, Oct. 2014, str. 252-260)
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