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

doi:10.1039/c1nr10768b

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 journal › Article › peer-review

22 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 language	English (US)
Pages (from-to)	4647-4654
Number of pages	8
Journal	Nanoscale
Volume	3
Issue number	11
DOIs	https://doi.org/10.1039/c1nr10768b
State	Published - Nov 2011
Externally published	Yes

ASJC Scopus subject areas

General Materials Science

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title = "Optical and electrical properties of colloidal (spherical Au)-(spinel ferrite nanorod) heterostructures",

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.",

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T1 - Optical and electrical properties of colloidal (spherical Au)-(spinel ferrite nanorod) heterostructures

AU - George, Chandramohan

AU - Genovese, Alessandro

AU - Qiao, Fen

AU - Korobchevskaya, Kseniya

AU - Comin, Alberto

AU - Falqui, Andrea

AU - Marras, Sergio

AU - Roig, Anna

AU - Zhang, Yang

AU - Krahne, Roman

AU - Manna, Liberato

PY - 2011/11

Y1 - 2011/11

N2 - 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.

AB - 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.

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DO - 10.1039/c1nr10768b

M3 - Article

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AN - SCOPUS:84856415757

SN - 2040-3364

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JO - Nanoscale

JF - Nanoscale

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

Abstract

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