Magnetic and relaxometric properties of Mn ferrites (Articolo in rivista)

Type
Label
  • Magnetic and relaxometric properties of Mn ferrites (Articolo in rivista) (literal)
Anno
  • 2008-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1088/0022-3727/41/13/134021 (literal)
Alternative label
  • Boni, A; Marinone, M; Innocenti, C; Sangregorio, C; Corti, M; Lascialfari, A; Mariani, M; Orsini, F; Poletti, G; Casula, MF (2008)
    Magnetic and relaxometric properties of Mn ferrites
    in Journal of physics. D, Applied physics (Print); IOP Publishing Ltd., Bristol BS1 6BE (Regno Unito)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Boni, A; Marinone, M; Innocenti, C; Sangregorio, C; Corti, M; Lascialfari, A; Mariani, M; Orsini, F; Poletti, G; Casula, MF (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 41 (literal)
Rivista
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroFascicolo
  • 13 (literal)
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • \"[Boni, A.; Innocenti, C.; Sangregorio, C.] Univ Florence, INSTM, I-50019 Sesto Fiorentino, Italy; [Boni, A.; Innocenti, C.; Sangregorio, C.] Univ Florence, Dipartimento Chim, I-50019 Sesto Fiorentino, Italy; [Marinone, M.; Lascialfari, A.; Orsini, F.; Poletti, G.] Univ Milan, INSTM, I-20134 Milan, Italy; [Marinone, M.; Lascialfari, A.; Orsini, F.; Poletti, G.] Univ Milan, Ist Fisiol Gen & Chim Biolog G Esposito, I-20134 Milan, Italy; [Marinone, M.; Lascialfari, A.; Orsini, F.; Poletti, G.] S3 CNR INFM, Modena, Italy; [Corti, M.; Lascialfari, A.; Mariani, M.] Univ Pavia, Dipartimento Fis A Volta, Unita CNISM, I-27100 Pavia, Italy; [Corti, M.; Lascialfari, A.; Mariani, M.] CNR INFM, I-27100 Pavia, Italy; [Casula, M. F.] Univ Cagliari, INSTM, I-09042 Cagliari, Italy; [Casula, M. F.] Univ Cagliari, Dipartimento Sci Chim, I-09042 Cagliari, Italy (literal)
Titolo
  • Magnetic and relaxometric properties of Mn ferrites (literal)
Abstract
  • \"We present the magnetic properties and the H-1 nuclear magnetic resonance dispersion profiles of Mn-ferrites-based compounds, as possible novel contrast agents (CAs) for magnetic resonance imaging (MRI). The samples consist of nanoparticles (NPs) with the magnetic core made of Mn1+xFe2-xO4, obtained by the rapid decomposition of metalcarbonyl into a hot solvent containing an oxidizer and a coordinating surfactant; by this procedure, monodisperse capped NPs with different sizes have been obtained. We have performed structural and morphological investigation by x-ray powder diffraction and transmission electron microscopy techniques and SQUID magnetometry experiments to investigate the magnetic behaviour of the samples. As required for MRI applications using negative CAs, the samples are superparamagnetic at room temperature, having blocking temperatures in the range 14-80 K. The longitudinal r(1) and transverse r(2) nuclear relaxivities appear to vary strongly with the magnetic core size, their values being comparable to commercial compounds in the high-frequency range nu > 100 MHz. The experimental results suggest that our samples are suitable for high-frequency MRI imagers in general and in particular for the 3 T clinical imager, as indeed suggested by a recent report (Tromsdorf et al 2007 Nanoletters 7 2422).\" (literal)
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