title: Coexistence of plasmonic and magnetic properties in Au89Fe11 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 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.
authors.affiliation: Department of Chemical Sciences, Università di Padova, via Marzolo 1, I-35131 Padova, Italy. vincenzo.amendola@unipd.it
authors.forename: Vincenzo
authors.initials: V
authors.lastname: Amendola
authors.forename: Moreno
authors.initials: M
authors.lastname: Meneghetti
authors.forename: Osman M
authors.initials: OM
authors.lastname: Bakr
authors.forename: Pietro
authors.initials: P
authors.lastname: Riello
authors.forename: Stefano
authors.initials: S
authors.lastname: Polizzi
authors.forename: Dalaver H
authors.initials: DH
authors.lastname: Anjum
authors.forename: Stefania
authors.initials: S
authors.lastname: Fiameni
authors.forename: Paolo
authors.initials: P
authors.lastname: Arosio
authors.forename: Tomas
authors.initials: T
authors.lastname: Orlando
authors.forename: Cesar
authors.initials: C
authors.lastname: de Julian Fernandez
authors.forename: Francesco
authors.initials: F
authors.lastname: Pineider
authors.forename: Claudio
authors.initials: C
authors.lastname: Sangregorio
authors.forename: Alessandro
authors.initials: A
authors.lastname: Lascialfari
mesh_terms: D000497:Alloys / Q000737:chemistry*; D003287:Contrast Media / Q000737:chemistry*; D006046:Gold / Q000737:chemistry; D007501:Iron / Q000737:chemistry; D008279:Magnetic Resonance Imaging; D008280:Magnetics; D053768:Metal Nanoparticles / Q000737:chemistry*; D011092:Polyethylene Glycols / Q000737:chemistry; D013696:Temperature; D013816:Thermodynamics
chemical_list: D000497:Alloys; D003287:Contrast Media; D011092:Polyethylene Glycols; D006046:Gold; D007501:Iron