title: Epitaxy, truncations, and overhangs in palladium nanoclusters adsorbed on MgO(001).
abstract: The structure of Pd clusters adsorbed on MgO(001) is determined by a combination of global-optimization methods using semiempirical potentials and density functional calculations. The transition to fcc clusters with (001) epitaxy is shown to take place in the size range 10<or=N<or=15 atoms. Truncations of vertices and basal corners in fcc epitaxial clusters proceed in parallel, while overhangs are already formed at small sizes, below 30 atoms.
authors.affiliation: IPCF/CNR, G. Moruzzi 1, Pisa, I56124, Italy.
authors.forename: G
authors.initials: G
authors.lastname: Barcaro
authors.forename: A
authors.initials: A
authors.lastname: Fortunelli
authors.forename: G
authors.initials: G
authors.lastname: Rossi
authors.forename: F
authors.initials: F
authors.lastname: Nita
authors.forename: R
authors.initials: R
authors.lastname: Ferrando