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. © 2013 The Royal Society of Chemistry.
KAUST Repository Item: Exported on 2020-10-01
Acknowledgements: This research was supported by the University of Padova grant (PRAT) no. CPDA114097/11. CJF, CS, FP, AL and PA acknowledge Fondazione Cariplo (Project no. 2010-0612) and Italian MIUR (FIRB Project "RINAME" No. RBAP114AMK). FP acknowledges "Rete ItalNanoNet" (Pr. no. RBPR05JH2P).