Issue 11, 2011
From the journal:

Nanoscale

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

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

* Corresponding authors

a Istituto Italiano di Tecnologia, Via Morego 30, Genova, Italy
E-mail: liberato.manna@iit.it

b Institut de Ciència de Materials de Barcelona (ICMAB-CSIC), Campus de la UAB, Bellaterra, Spain

Abstract

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

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

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Article information

DOI
https://doi.org/10.1039/C1NR10768B
Article type
Paper
Submitted
08 Jul 2011
Accepted
12 Aug 2011
First published
27 Sep 2011

Nanoscale, 2011,3, 4647-4654

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

C. George, A. Genovese, F. Qiao, K. Korobchevskaya, A. Comin, A. Falqui, S. Marras, A. Roig, Y. Zhang, R. Krahne and L. Manna, Nanoscale, 2011, 3, 4647 DOI: 10.1039/C1NR10768B

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