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Large specific absorption rates in the magnetic hyperthermia properties of metallic iron nanocubes

Mehdaoui, Boubker and Meffre, Anca and Lacroix, Lise-Marie and Carrey, Julian and Lachaize, Sébastien and Gougeon, Michel and Respaud, Marc and Chaudret, Bruno Large specific absorption rates in the magnetic hyperthermia properties of metallic iron nanocubes. (2010) Journal of Magnetism and Magnetic Materials, vol. 322 (n° 19). pp. L49-L52. ISSN 0304-8853

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Official URL: http://dx.doi.org/10.1016/j.jmmm.2010.05.012

Abstract

We report on the magnetic hyperthermia properties of chemically synthesized ferromagnetic 11 and 16 nm Fe(0) nanoparticles of cubic shape displaying the saturation magnetization of bulk iron. The specific absorption rate measured on 16 nm nanocubes is 1690±160 W/g at 300 kHz and 66 mT. This corresponds to specific losses-per-cycle of 5.6 mJ/g, largely exceeding the ones reported in other systems. A way to quantify the degree of optimization of any system with respect to hyperthermia applications is proposed. Applied here, this method shows that our nanoparticles are not fully optimized, probably due to the strong influence of magnetic interactions on their magnetic response. Once protected from oxidation and further optimized, such nano-objects could constitute efficient magnetic cores for biomedical applications requiring very large heating power.

Item Type:Article
Additional Information:Thanks to Elsevier editor. The definitive version is available at http://www.sciencedirect.com The original PDF of the article can be found at Journal of Magnetism and Magnetic Materials website : http://www.sciencedirect.com/science/journal/03048853
Audience (journal):International peer-reviewed journal
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Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT
Université de Toulouse > Institut National des Sciences Appliquées de Toulouse - INSA
Université de Toulouse > Université Paul Sabatier-Toulouse III - UPS
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Deposited By:Leila Abdelouhab

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