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Fractionated Magnetic Multicore Nanoparticles for Magnetic Particle Imaging

  • Silvio DutzEmail author
  • Dietmar Eberbeck
  • Robert Müller
  • Matthias Zeisberger
Part of the Springer Proceedings in Physics book series (SPPHY, volume 140)

Abstract

Aim of this study was the investigation of the suitability of magnetic multicore nanoparticles (MCNP) for magnetic particle imaging. For this, MCNP of different cluster sizes were investigated. To obtain a set of samples which differ in their cluster sizes the MCNP were classified into fractions of different mean sizes by centrifugation. By the fractionation particles with hydrodynamic diameters from 100 to 800 nm were obtained. Magnetic measurements confirmed a correlation of the hydrodynamic size with the effective magnetic volume of the particles in these fractions – e.g., with increasing particle size the coercivity of the particles varied from 3.5 to 25.8 Oe. Magnetic particle spectrometry investigations showed a clear dependence of the quality of MPS signal on the hydrodynamic diameter of the particles and thus the cluster size. In particular the amplitude ratio of the higher (15...40) harmonics to the 3rd harmonic span over one order of magnitude, where the smaller MCNP showed the highest values.

Keywords

Cluster Size Magnetic Particle Hydrodynamic Diameter Primary Particle Size Photon Correlation Spectroscopy 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. 1.
    Eberbeck, D., et al.: Evidence of aggregates of magnetic nanoparticles in suspensions which determine the magnetisation behaviour. In: Magnetic Nanoparticles – Proceedings of the First International Workshop on Magnetic Particle Imaging, pp. 66–72. World Scientific (2010)Google Scholar
  2. 2.
    Dutz, S., et al.: Ferrofluids of magnetic multicore nanoparticles for biomedical applications. J. Magn. Magn. Mater. 321(10), 1501–1504 (2009)CrossRefGoogle Scholar
  3. 3.
    Eberbeck, D., et al.: Aggregation behaviour of magnetic nanoparticle suspensions investigated by magnetorelaxometry. J. Phys. Condens. Matter. 18, 2829 (2006)CrossRefGoogle Scholar

Copyright information

© Springer-Verlag GmbH Berlin Heidelberg 2012

Authors and Affiliations

  • Silvio Dutz
    • 1
    Email author
  • Dietmar Eberbeck
    • 2
  • Robert Müller
    • 1
  • Matthias Zeisberger
    • 1
  1. 1.Institute of Photonic TechnologiesJenaGermany
  2. 2.Physikalisch-Technische BundesanstaltBerlinGermany

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