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Journal of Nanoparticle Research

, Volume 10, Issue 5, pp 877–880 | Cite as

Size effects in monodomain magnetite based ferrofluids

  • I. Nedkov
  • L. Slavov
  • T. Merodiiska
  • P. Lukanov
  • Ph. Tailhades
  • M. Gougeon
  • R. E. Vandenberghe
Brief Communication

Abstract

Ferrofluids based on two types of hybrid particles Fe3O4/β-cyclodextrin were prepared: Using monodomain (below 60 nm) magnetite nanoparticles with (A) non-superparamagnetic (non-SPM) behaviour and (B) with superparamagnetic (SPM) behaviour. We found a strong dependence of the hybrid particles’ magnetic properties on their size and homogeneity. In both types of ferrofluids we observed hyperthermia upon applying an ac electromagnetic field with frequency 40 kHz and amplitude 30 kA/m. The maximal ΔТ upon irradiation with duration of about 12 min for the non-SPM particles was 12 °C, while for the SPM ones it was 3.5 °C.

Keywords

Ferrofluids Magnetite nanoparticles Hyperthermia Superparamagnetism β-Cyclodextrin 

Notes

Acknowledgements

This work was supported by Bulgarian National Science Fund under TH-1/01 in co-operation with CNRS, France and FWO—Flanders, Belgium.

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Copyright information

© Springer Science+Business Media B.V. 2007

Authors and Affiliations

  • I. Nedkov
    • 1
  • L. Slavov
    • 1
  • T. Merodiiska
    • 1
  • P. Lukanov
    • 1
  • Ph. Tailhades
    • 2
  • M. Gougeon
    • 2
  • R. E. Vandenberghe
    • 3
  1. 1.Institute of ElectronicsBulgarian Academy of SciencesSofiaBulgaria
  2. 2.LCMIE - Universite Paul SabatierToulouseFrance
  3. 3.Department of Subatomic and Radiation PhysicsUniversity of GentGentBelgium

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