title: Growth of three-shell onionlike bimetallic nanoparticles.
abstract: We show by molecular dynamics simulations on three systems (B/A=Pd/Ag, Cu/Ag, and Ni/Ag) that three-shell metallic nanoparticles made by a core of a metal A, an intermediate shell of metal B and an external shell of metal A (A-B-A nanoparticles) can be grown by deposition of B atoms onto an A core. The growth of the intermediate B shell is triggered by the fact that the most favorable positions for isolated B impurities inside A clusters are located just one layer below the cluster surface.
authors.affiliation: INFM and IMEM/CNR, Dipartimento di Fisica dell'Università di Genova, via Dodecaneso 33, 16146 Genova, Italy.
authors.forename: F
authors.initials: F
authors.lastname: Baletto
authors.forename: C
authors.initials: C
authors.lastname: Mottet
authors.forename: R
authors.initials: R
authors.lastname: Ferrando