Biocompatible superparamagnetic iron oxide nanoparticles used for contrast agents: a structural and magnetic study
作者： L.F. Gamarra , G.E.S. Brito , W.M. Pontuschka , E. Amaro , A.H.C. Parma
DOI: 10.1016/J.JMMM.2004.11.123
关键词:
摘要: Abstract The magnetic properties of different biocompatible iron oxide nanoparticles (MION) are presented. Dextran-coated, magnetite (Fe 3 O 4 ) MIONs were studied as supplied and after lyophilization, to disentangle the effects particle interactions. All samples showed superparamagnetic behavior at room temperature, with blocking transitions T B ∼40–56 K (at 100 Oe), depending on dynamics thermally activated process reveals that effect dipolar interactions is increase energy barriers individual particles.
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