title: Optical and electrical properties of colloidal (spherical Au)-(spinel ferrite nanorod) heterostructures.
abstract: We report here a simple synthetic route to Au-Fe(x)O(y) heterostructures in which spinel ferrite (Fe(x)O(y)) grows as a nanorod on a spherical gold (Au) seed. The large red shift in the plasmon resonance in the heterostructures could be explained by a dielectric effect (although we could not entirely exclude a contribution due to electron transfer from Au to defect states at the Au-Fe(x)O(y) interface), while the magnetic properties of the Au-Fe(x)O(y) heterostructures were basically the same as those of the corresponding nanocrystals after Au leaching. In films of Au-Fe(x)O(y) heterostructures the electrical conductivity appeared to be mediated by the Au domains.
authors.affiliation: Istituto Italiano di Tecnologia, Via Morego 30, 16163, Genova, Italy.
authors.forename: Chandramohan
authors.initials: C
authors.lastname: George
authors.forename: Alessandro
authors.initials: A
authors.lastname: Genovese
authors.forename: Fen
authors.initials: F
authors.lastname: Qiao
authors.forename: Kseniya
authors.initials: K
authors.lastname: Korobchevskaya
authors.forename: Alberto
authors.initials: A
authors.lastname: Comin
authors.forename: Andrea
authors.initials: A
authors.lastname: Falqui
authors.forename: Sergio
authors.initials: S
authors.lastname: Marras
authors.forename: Anna
authors.initials: A
authors.lastname: Roig
authors.forename: Yang
authors.initials: Y
authors.lastname: Zhang
authors.forename: Roman
authors.initials: R
authors.lastname: Krahne
authors.forename: Liberato
authors.initials: L
authors.lastname: Manna
mesh_terms: D003102:Colloids / Q000737:chemistry; D004553:Electric Conductivity; D005290:Ferric Compounds / Q000737:chemistry*; D006046:Gold / Q000737:chemistry*; D008422:Materials Testing; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure*; D010316:Particle Size; D012031:Refractometry
chemical_list: D003102:Colloids; D005290:Ferric Compounds; C000499:ferric oxide; D006046:Gold