Size-dependant heating rates of iron oxide nanoparticles for magnetic fluid hyperthermia

Using the thermal decomposition of organometallics method we have synthesized high-quality, iron oxide nanoparticles of tailorable size up to ∼15 nm and transferred them to a water phase by coating with a biocompatible polymer. The magnetic behavior of these particles was measured and fit to a log-n...

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Bibliographic Details
Published in:Journal of magnetism and magnetic materials 2009-07, Vol.321 (13), p.1947-1950
Main Authors: Gonzales-Weimuller, Marcela, Zeisberger, Matthias, Krishnan, Kannan M.
Format: Article
Language:English
Subjects:
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Diamagnetism, paramagnetism and superparamagnetism
Exact sciences and technology
Magnetic fluid hyperthermia
Magnetic liquids
Magnetic properties and materials
Magnetic properties of nanostructures
Magnetic relaxation
Nanoparticle
Physics
Studies of specific magnetic materials
Superparmagnetism
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Summary:Using the thermal decomposition of organometallics method we have synthesized high-quality, iron oxide nanoparticles of tailorable size up to ∼15 nm and transferred them to a water phase by coating with a biocompatible polymer. The magnetic behavior of these particles was measured and fit to a log-normal distribution using the Chantrell method and their polydispersity was confirmed to be very narrow. By performing calorimetry measurements with these monodisperse particles we have unambiguously demonstrated, for the first time, that at a given frequency, heating rates of superparamagnetic particles are dependent on particle size, in agreement with earlier theoretical predictions.
ISSN:0304-8853
DOI:10.1016/j.jmmm.2008.12.017