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Issue 28, 2013
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Magnetism and spin dynamics of novel encapsulated iron oxide superparamagnetic nanoparticles

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Abstract

Encapsulated Fe3O4 nanoparticles of average diameters d = 12 nm are obtained by coprecipitation, in the presence of 2-methoxyethanol hemiester of poly(maleic anhydride-alt-butyl vinyl ether) 5% grafted with poly(ethylene glycol) (VP-MAG nanoparticles). A complete characterization of nude and encapsulated nanoparticles through structural techniques (namely XRD, TEM, SEM), Raman spectroscopy and magnetic measurements has been performed. These nanoparticles compared with commercial compounds (ENDOREM®) present superparamagnetic behavior and nuclear relaxivities that make them promising as magnetic resonance imaging (MRI) contrast agents (CAs). We found that our nanostructures exhibit r2 relaxivity higher than those of commercial CAs over the whole frequency range. The MRI efficiency of our samples was related to their microstructural and magnetic properties.

Graphical abstract: Magnetism and spin dynamics of novel encapsulated iron oxide superparamagnetic nanoparticles

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Publication details

The article was received on 23 Nov 2012, accepted on 08 May 2013 and first published on 10 May 2013


Article type: Paper
DOI: 10.1039/C3DT32805H
Citation: Dalton Trans., 2013,42, 10282-10291
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    Magnetism and spin dynamics of novel encapsulated iron oxide superparamagnetic nanoparticles

    P. Arosio, G. Baldi, F. Chiellini, M. Corti, A. Dessy, P. Galinetto, M. Gazzarri, M. S. Grandi, C. Innocenti, A. Lascialfari, G. Lorenzi, F. Orsini, A. M. Piras, C. Ravagli and C. Sangregorio, Dalton Trans., 2013, 42, 10282
    DOI: 10.1039/C3DT32805H

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