Magnetic Hyperthermia with Fe3O4 nanoparticles: the Influence of Particle Size on Energy Absorption

We have studied the magnetic and power absorption properties of a series of magnetic nanoparticles (MNPs) of Fe3O4 with average sizes ranging from 3 to 26 nm. Heating experiments as a function of particle size revealed a strong increase in the specific power absorption (SPA) values for particles wit...

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Bibliographic Details
Published in:arXiv.org 2013-02
Main Authors: Goya, Gerardo F, Lima, Enio, Jr, Arelaro, Amanda D, Torres, Teobaldo E, Rechenberg, Hercilio R, Rossi, Liane, Marquina, Clara, Ibarra, M Ricardo
Format: Article
Language:English
Subjects:
Energy absorption
Hyperthermia
Iron oxides
Magnetic properties
Magnetic saturation
Nanoparticles
Particle size
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Summary:We have studied the magnetic and power absorption properties of a series of magnetic nanoparticles (MNPs) of Fe3O4 with average sizes ranging from 3 to 26 nm. Heating experiments as a function of particle size revealed a strong increase in the specific power absorption (SPA) values for particles with = 25-30 nm. On the other side saturation magnetization MS values of these MNPs remain essentially constant for particles with above 10 nm, suggesting that the absorption mechanism is not determined by MS. The largest SPA value obtained was 130 W/g, corresponding to a bimodal particle distribution with average size values of 17 and 26 nm.
ISSN:2331-8422
DOI:10.48550/arxiv.1302.6912