title: Ordered arrays of size-selected oxide nanoparticles.
abstract: A bottom-up approach to produce a long-range ordered superlattice of monodisperse and isomorphic metal-oxide nanoparticles (NP) supported onto an oxide substrate is demonstrated. The synthetic strategy consists of self-assembling metallic NP on an ultrathin nanopatterned aluminum oxide template followed by a morphology-conserving oxidation process, and is exemplified in the case of Ni, but is generally applicable to a wide range of metallic systems. Both fully oxidized and core-shell metal-metal-oxide particles are synthesized, up to 3-4 nm in diameter, and characterized via spectroscopic and theoretical tools. This opens up a new avenue for probing unit and ensemble effects on the properties of oxide materials in the nanoscale regime.
authors.affiliation: Surface and Interface Physics, Institute of Physics, Karl-Franzens University Graz A-8010 Graz, Austria.
authors.forename: Luca
authors.initials: L
authors.lastname: Gragnaniello
authors.forename: Teng
authors.initials: T
authors.lastname: Ma
authors.forename: Giovanni
authors.initials: G
authors.lastname: Barcaro
authors.forename: Luca
authors.initials: L
authors.lastname: Sementa
authors.forename: Fabio R
authors.initials: FR
authors.lastname: Negreiros
authors.forename: Alessandro
authors.initials: A
authors.lastname: Fortunelli
authors.forename: Svetlozar
authors.initials: S
authors.lastname: Surnev
authors.forename: Falko P
authors.initials: FP
authors.lastname: Netzer
mesh_terms: D000535:Aluminum / Q000737:chemistry; D000537:Aluminum Oxide / Q000737:chemistry; D016252:Microscopy, Scanning Tunneling; D053758:Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure; D009532:Nickel / Q000737:chemistry*; D010084:Oxidation-Reduction; D010316:Particle Size
chemical_list: D009532:Nickel; C028007:nickel monoxide; D000535:Aluminum; D000537:Aluminum Oxide