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Collective Behavior of Magnetic Nanoparticles in Polyelectrolyte Brushes

Authors

  • Won San Choi,

    1. Melville Laboratory for Polymer Synthesis Department of Chemistry University of Cambridge Lensfield Road, CB2 1 EW (UK)
    2. Korea Basic Science Institute (KBSI) 664-14 Dukjin dong 1-ga, Dukjin-gu, Jeonju, 561-756 (Republic of Korea)
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  • Hye Young Koo,

    1. Melville Laboratory for Polymer Synthesis Department of Chemistry University of Cambridge Lensfield Road, CB2 1 EW (UK)
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  • Ju Young Kim,

    1. Department of Materials Science and Engineering Gwangju Institute of Science and Technology (GIST) 1 Oryong dong, Buk-gu, 500712, Gwangju (Republic of Korea)
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  • Wilhelm T. S. Huck

    Corresponding author
    1. Melville Laboratory for Polymer Synthesis Department of Chemistry University of Cambridge Lensfield Road, CB2 1 EW (UK)
    • Melville Laboratory for Polymer Synthesis Department of Chemistry University of Cambridge Lensfield Road, CB2 1 EW (UK).
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  • This work was supported by the Korea Research Foundation Grant funded by the Korean Government (MOEHRD, KRF-2006-352- D00068). The authors thank Dr. Jou Hahn Lee and Byung Chul Son for helpful discussions and for carrying out XPS measurements.

Abstract

Polyelectrolyte brushes loaded with magnetic nanoparticles can be formed through the reaction of immobilized Fe2+/3+ ions in the brush. These particles show very unusual magnetic properties, not normally associated with such small nanoparticles. Upon application of an external magnetic field, the brushes showed reversible dimensional changes.

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