Optical and electrical properties of colloidal (spherical Au)-(spinel ferrite nanorod) heterostructures

Chandramohan George, Alessandro Genovese, Fen Qiao, Kseniya Korobchevskaya, Alberto Comin, Andrea Falqui, Sergio Marras, Anna Roig, Yang Zhang, Roman Krahne, Liberato Manna*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

18 Scopus citations

Abstract

We report here a simple synthetic route to Au-Fe xO y heterostructures in which spinel ferrite (Fe xO 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 xO y interface), while the magnetic properties of the Au-Fe xO y heterostructures were basically the same as those of the corresponding nanocrystals after Au leaching. In films of Au-Fe xO y heterostructures the electrical conductivity appeared to be mediated by the Au domains.

Original languageEnglish (US)
Pages (from-to)4647-4654
Number of pages8
JournalNanoscale
Volume3
Issue number11
DOIs
StatePublished - Nov 1 2011

ASJC Scopus subject areas

  • Materials Science(all)

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