Heating Efficiency of Iron Oxide Nanoparticles in Hyperthermia: Effect of Preparation Conditions

Author

Parmar, Harshida G. ; Smolkova, Ilona S. ; Kazantseva, Natalia E. ; Babayan, Vladimir ; Pastorek, Miroslav ; Pizurova, Nadezda

Author_Institution

Centre of Polymer Syst., Tomas Bata Univ., Zlin, Czech Republic

Volume

50

Issue

11

fYear

2014

fDate

Nov. 2014

Firstpage

1

Lastpage

4

Abstract

The correlation between magneto-structural properties of iron oxide nanoparticles and their heating efficiency in ac magnetic fields is investigated. Nanoparticles with an average size of 13 nm and narrow size distribution are synthesized by coprecipitation of ferrous and ferric salts in an alkaline medium in which the salts ratio is systematically varied. To obtain nanoparticles with single-phase composition, the prepared samples are annealed at 200 °C. The lattice parameters of all nanoparticles deduced from X-ray diffraction analysis correspond to multiphase composition, i.e., to a mixture of magnetite and maghemite phases. However, low-temperature Mossbauer spectroscopy revealed complete transformation of magnetite to maghemite in annealed samples. The annealed samples show slightly higher value of specific loss power at a certain frequency and amplitude of ac magnetic field compared with other samples.

Keywords

Mossbauer effect; X-ray diffraction; annealing; hyperthermia; iron compounds; magnetic leakage; magnetic particles; nanofabrication; nanomagnetics; nanomedicine; nanoparticles; particle size; precipitation (physical chemistry); Fe₃O₄; X-ray diffraction analysis; ac magnetic field amplitude; ac magnetic field frequency; ac magnetic fields; alkaline medium; annealing; average nanoparticle size; complete transformation; coprecipitation; ferric salts; ferrous salts; heating efficiency; hyperthermia; iron oxide nanoparticles; low-temperature Mossbauer spectroscopy; magnetite-maghemite phase mixture; magneto-structural properties; multiphase composition; narrow size distribution; preparation condition effect; single-phase composition; specific loss power; Heating; Iron; Magnetic hysteresis; Nanoparticles; Perpendicular magnetic anisotropy; X-ray scattering; Iron oxide nanoparticles (NPs); Mossbauer spectroscopy; Rietveld refinement; X-ray diffraction (XRD); magnetic hyperthermia (MH);

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2014.2329553

Filename

6971664