ELECTRONIC-STRUCTURE OF SMALL PT CLUSTERS ON NI(111)

In the present work, the electronic structure and the equilibrium spat ial distribution of Pt atoms adsorbed on a Ni(111) surface have been s tudied. The mean adsorption energies for linear and triangular 3-atom aggregates, both in epitaxy with the substrate, are calculated and ana lyzed. Local density of states curves show important differences in co mparison with those of the 7-atom aggregates. Experimental shifts of t he Pt4f core level seem to be in agreement with the predicted chemical shifts based on the calculated electronic structure.