Coexistence of plasmonic and magnetic properties in Au89Fe 11 nanoalloys
Anjum, Dalaver H.
De Julian Fernandez, César
KAUST DepartmentPhysical Sciences and Engineering (PSE) Division
KAUST Catalysis Center (KCC)
Imaging and Characterization Core Lab
KAUST Solar Center (KSC)
Advanced Nanofabrication, Imaging and Characterization Core Lab
Materials Science and Engineering Program
Functional Nanomaterials Lab (FuNL)
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AbstractWe 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.
SponsorsThis 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).
PublisherRoyal Society of Chemistry (RSC)
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