Coexistence of plasmonic and magnetic properties in Au89Fe 11 nanoalloys

Vincenzo Amendola; Moreno Meneghetti; Osman M. Bakr; Pietro Riello; Stefano Polizzi; Dalaver H. Anjum; Stefania Fiameni; Paolo Arosio; Tomas Orlando; Cesar De Julian Fernandez; Francesco Pineider; Claudio Sangregorio; Alessandro Lascialfari

doi:10.1039/c3nr01119d

Coexistence of plasmonic and magnetic properties in Au₈₉Fe ₁₁ nanoalloys

Vincenzo Amendola, Moreno Meneghetti, Osman M. Bakr, Pietro Riello, Stefano Polizzi, Dalaver H. Anjum, Stefania Fiameni, Paolo Arosio, Tomas Orlando, Cesar De Julian Fernandez, Francesco Pineider, Claudio Sangregorio, Alessandro Lascialfari

Physics

Research output: Contribution to journal › Article › peer-review

95 Scopus citations

Abstract

We describe an environmentally friendly, top-down approach to the synthesis of Au₈₉Fe₁₁ nanoparticles (NPs). The plasmonic response of the gold moiety and the magnetism of the iron moiety coexist in the Au ₈₉Fe₁₁ nanoalloy with strong modification compared to single element NPs, revealing a non-linear surface plasmon resonance dependence on the iron fraction and a transition from paramagnetic to a spin-glass state at low temperature. These nanoalloys are accessible to conjugation with thiolated molecules and they are promising contrast agents for magnetic resonance imaging.

Original language	British English
Pages (from-to)	5611-5619
Number of pages	9
Journal	Nanoscale
Volume	5
Issue number	12
DOIs	https://doi.org/10.1039/c3nr01119d
State	Published - 21 Jun 2013

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title = "Coexistence of plasmonic and magnetic properties in Au89Fe 11 nanoalloys",

abstract = "We describe an environmentally friendly, top-down approach to the synthesis of Au89Fe11 nanoparticles (NPs). The plasmonic response of the gold moiety and the magnetism of the iron moiety coexist in the Au 89Fe11 nanoalloy with strong modification compared to single element NPs, revealing a non-linear surface plasmon resonance dependence on the iron fraction and a transition from paramagnetic to a spin-glass state at low temperature. These nanoalloys are accessible to conjugation with thiolated molecules and they are promising contrast agents for magnetic resonance imaging.",

author = "Vincenzo Amendola and Moreno Meneghetti and Bakr, {Osman M.} and Pietro Riello and Stefano Polizzi and Anjum, {Dalaver H.} and Stefania Fiameni and Paolo Arosio and Tomas Orlando and {De Julian Fernandez}, Cesar and Francesco Pineider and Claudio Sangregorio and Alessandro Lascialfari",

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doi = "10.1039/c3nr01119d",

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T1 - Coexistence of plasmonic and magnetic properties in Au89Fe 11 nanoalloys

AU - Amendola, Vincenzo

AU - Meneghetti, Moreno

AU - Bakr, Osman M.

AU - Riello, Pietro

AU - Polizzi, Stefano

AU - Anjum, Dalaver H.

AU - Fiameni, Stefania

AU - Arosio, Paolo

AU - Orlando, Tomas

AU - De Julian Fernandez, Cesar

AU - Pineider, Francesco

AU - Sangregorio, Claudio

AU - Lascialfari, Alessandro

PY - 2013/6/21

Y1 - 2013/6/21

N2 - We describe an environmentally friendly, top-down approach to the synthesis of Au89Fe11 nanoparticles (NPs). The plasmonic response of the gold moiety and the magnetism of the iron moiety coexist in the Au 89Fe11 nanoalloy with strong modification compared to single element NPs, revealing a non-linear surface plasmon resonance dependence on the iron fraction and a transition from paramagnetic to a spin-glass state at low temperature. These nanoalloys are accessible to conjugation with thiolated molecules and they are promising contrast agents for magnetic resonance imaging.

AB - We describe an environmentally friendly, top-down approach to the synthesis of Au89Fe11 nanoparticles (NPs). The plasmonic response of the gold moiety and the magnetism of the iron moiety coexist in the Au 89Fe11 nanoalloy with strong modification compared to single element NPs, revealing a non-linear surface plasmon resonance dependence on the iron fraction and a transition from paramagnetic to a spin-glass state at low temperature. These nanoalloys are accessible to conjugation with thiolated molecules and they are promising contrast agents for magnetic resonance imaging.

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DO - 10.1039/c3nr01119d

M3 - Article

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AN - SCOPUS:84878710837

SN - 2040-3364

VL - 5

SP - 5611

EP - 5619

JO - Nanoscale

JF - Nanoscale

IS - 12

ER -

Coexistence of plasmonic and magnetic properties in Au₈₉Fe ₁₁ nanoalloys

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