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Journal of Applied Physics / Volume 97 / Issue 10 / PROCEEDINGS OF THE 49TH ANNUAL CONFERENCE ON MAGNETISM AND MAGNETIC MATERIALS / Patterned Arrays: Synthesis and Magnetic Properties

J. Appl. Phys. 97, 10J510 (2005); http://dx.doi.org/10.1063/1.1859212 (3 pages)

Energy absorption of superparamagnetic iron oxide nanoparticles by microwave irradiation

Do Kyung Kim1, M. Shahrooz Amin2, Shihab Elborai2, Se-Hee Lee2, Yüksel Koseoglu3, Markus Zahn2, and Mamoun Muhammed4

1Department of Electrical Engineering and Computer Science (EECS), Laboratory for Electromagnetic and Electronic Systems, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 and Materials Chemistry Division, Department of Materials Science and Engineering, Royal Institute of Technology, Brinellvaegen 23, 2tr., Stockholm SE10044, Sweden
2Department of Electrical Engineering and Computer Science (EECS), Laboratory for Electromagnetic and Electronic Systems, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139
3Department of Physics, Fatih University, TR34500 B.Cekmece, Istanbul, Turkey
4Materials Chemistry Division, Department of Materials Science and Engineering, Royal Institute of Technology, Brinellvaegen 23, 2tr., Stockholm SE10044, Sweden

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(Published online 12 May 2005)

The main complexity in hyperthermia is generating and controlling the temperature distribution within tumor cells without damaging the normal tissue. Superparamagnetic iron oxide nanoparticles (SPIONs) with a diameter of 11 nm were prepared by controlled coprecipitation and coated with oleic acid to prevent agglomeration and flocculation in the solvent. In situ monitoring of the temperature increment was performed to interpret the microwave absorption rate of the SPION dispersed in appropriate host media (polar or nonpolar solvents) during microwave irradiation. This approach allowed for the prediction of heating mechanisms as a result of the excitation of unpaired electrons of iron, effects of coating agents, particle size, and volume fraction (ϕ). The conversion efficiency from microwave irradiation to thermal energy was predicted by applying the conservation of energy to a differential volume. The rates of heat loss and energy absorption were obtained by nonlinear fitting of the experimental data.

© 2005 American Institute of Physics

Article Outline

  1. INTRODUCTION
  2. EXPERIMENT
  3. RESULTS AND DISCUSSION
  4. CONCLUSIONS

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KEYWORDS and PACS

Keywords

iron compounds, magnetic particles, biomedical materials, superparamagnetism, nanoparticles, hyperthermia, biological effects of microwaves, precipitation, flocculation, particle size

PACS

ARTICLE DATA

Digital Object Identifier
http://dx.doi.org/10.1063/1.1859212

PUBLICATION DATA

ISSN

0021-8979 (print)  
1089-7550 (online)

Publisher

$abstract.society.value is a Member of CrossRef American Institute of Physics

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    References

    A. Jordan, R. Scholz, P. Wust, H. Föhling, and R. Felix, J. Magn. Magn. Mater. 201, 413 (1999)JAPIAU000080000006003426000001.


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