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

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS

卷:322

Letter

Mehdaoui, B.^1,2  Meffre, A.^1,2  Lacroix, L. -M.^1,2  Carrey, J.^1,2  Lachaize, S.^1,2  Gougeon, M.³  Respaud, M.^1,2  Chaudret, B.⁴ 

[1] Univ Toulouse, INSA, UPS, LPCNO, F-31077 Toulouse, France

[2] CNRS, UMR 5215, LPCNO, F-31077 Toulouse, France

[3] Inst CARNOT, CIRIMAT, UMR 5085, F-31062 Toulouse, France

[4] CNRS, Chim Coordinat Lab, F-31077 Toulouse 4, France

关键词: Hyperthermia;    Magnetic nanoparticle;    Iron;    Organometallic synthesis;   

DOI  :  10.1016/j.jmmm.2010.05.012

来源: Elsevier

【 摘 要 】

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. (C) 2010 Elsevier B.V. All rights reserved.

【 授权许可】

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