Magnetic resonance study of zero-field-frozen magnetite-based biocompatible magnetic fluid

In this paper, magnetic resonance was used to investigate biocompatible magnetic fluid samples based on dextran-coated magnetite nanoparticles (9.4-nm average diameter). Samples containing different particle concentration (4.8 /spl times/ 10/sup 14/ and 2.4 /spl times/ 10/sup 16/ particle/cm/sup 3/)...

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Veröffentlicht in:	IEEE transactions on magnetics 2003-09, Vol.39 (5), p.2642-2644
Hauptverfasser:	Silveira, L.B., Santos, J.G., Pelegrini, F., Gansau, C., Buske, N., Morais, P.C.
Format:	Artikel
Sprache:	eng
Schlagworte:	Absorption Animals Condensed matter: electronic structure, electrical, magnetic, and optical properties Exact sciences and technology Fine-particle systems In vivo Iron Magnetic analysis Magnetic liquids Magnetic properties and materials Magnetic resonance Magnetism Nanoparticles Physics Small particles and nanoscale materials Studies of specific magnetic materials Temperature dependence Temperature distribution
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Beschreibung
Zusammenfassung:	In this paper, magnetic resonance was used to investigate biocompatible magnetic fluid samples based on dextran-coated magnetite nanoparticles (9.4-nm average diameter). Samples containing different particle concentration (4.8 /spl times/ 10/sup 14/ and 2.4 /spl times/ 10/sup 16/ particle/cm/sup 3/) were investigated in the temperature range of 100-300 K. Analysis of the temperature dependence of the resonance linewidth (/spl Delta/H/sub R/) revealed larger average particle diameter (about 13% larger) in the concentrated sample, indicating particle agglomeration. Larger particle diameter (about 17% larger) was also revealed from the analysis of the temperature dependence of the resonance field (H/sub R/).
ISSN:	0018-9464 1941-0069
DOI:	10.1109/TMAG.2003.815539