Issue 12, 2013
From the journal:

Nanoscale

Coexistence of plasmonic and magnetic properties in Au89Fe11 nanoalloys†

Vincenzo Amendola,*a   Moreno Meneghetti,a   Osman M. Bakr,b   Pietro Riello,c   Stefano Polizzi,c   Dalaver H. Anjum,d   Stefania Fiameni,e   Paolo Arosio,f   Tomas Orlando,g   Cesar de Julian Fernandez,h   Francesco Pineider,ij   Claudio Sangregorioj  and  Alessandro Lascialfarifg  

* Corresponding authors

a Department of Chemical Sciences, Università di Padova, via Marzolo 1, I-35131 Padova, Italy
E-mail: vincenzo.amendola@unipd.it

b Solar & Photovoltaics Engineering Research Center, Division of Physical Sciences and Engineering, King Abdullah University of Science and Technology (KAUST), Thuwal, 23955-6900 Saudi Arabia

c Department of Molecular Sciences and Nanosystems, Università Ca' Foscari Venezia and INSTM UdR Venezia, via Torino 155/b, I-30172 Venezia-Mestre, Italy

d Advanced Nanofabrication, Imaging, and Characterization CoreLab, King Abdullah University of Science & Technology (KAUST), Thuwal 23955-6900, Saudi Arabia

e CNR – IENI, Corso Stati Uniti, 4 35127 Padova, Italy

f Dipartimento di Fisica, Università degli Studi di Milano and Consorzio INSTM, Via Celoria 16, Milano, Italy

g Dipartimento di Fisica, Università degli Studi di Pavia and Consorzio INSTM, Via Bassi 6, I-27100 Pavia, Italy

h CNR-ISTM Milano and INSTM, via C. Golgi 19, 20133 Milano, Italy

i C.N.R.-I.S.T.M. c/o Department of Chemical Sciences, Università di Padova, via Marzolo 1, I-35131 Padova, Italy

j Department of Chemistry, Università di Firenze & I.N.S.T.M., Via della Lastruccia 3, I-50019 Sesto Fiorentino (FI), Italy

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 Au89Fe11 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.

Graphical abstract: Coexistence of plasmonic and magnetic properties in Au89Fe11 nanoalloys

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Article information

DOI
https://doi.org/10.1039/C3NR01119D
Article type
Paper
Submitted
05 Mar 2013
Accepted
14 Apr 2013
First published
23 Apr 2013

Nanoscale, 2013,5, 5611-5619

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Coexistence of plasmonic and magnetic properties in Au89Fe11 nanoalloys

V. Amendola, M. Meneghetti, O. M. Bakr, P. Riello, S. Polizzi, D. H. Anjum, S. Fiameni, P. Arosio, T. Orlando, C. de Julian Fernandez, F. Pineider, C. Sangregorio and A. Lascialfari, Nanoscale, 2013, 5, 5611 DOI: 10.1039/C3NR01119D

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