Synthesis and characterization of water-dispersible, superparamagnetic single-wall carbon nanotubes decorated with iron oxide nanoparticles and well-defined chelating diblock copolymers

Authors

  • Petri Papaphilippou,

    1. Department of Mechanical and Manufacturing Engineering, University of Cyprus, P. O. Box 20537, Nicosia 1678, Cyprus
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  • Rodica Turcu,

    1. Department for Physics of Nanostructured Systems, National Institute R&D for Isotopic and Molecular Technologies, Cluj-Napoca 400293, Romania
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  • Theodora Krasia-Christoforou

    Corresponding author
    1. Department of Mechanical and Manufacturing Engineering, University of Cyprus, P. O. Box 20537, Nicosia 1678, Cyprus
    • Department of Mechanical and Manufacturing Engineering, University of Cyprus, P. O. Box 20537, Nicosia 1678, Cyprus
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Abstract

A novel approach for the fabrication of magneto-active carbon nanotubes (CNTs) stabilized in aqueous media, involving the combination of carboxylated single-wall carbon nanotubes (SWCNTs) with a new class of methacrylate-based chelating diblock copolymers, is described. More precisely, a well-defined diblock copolymer consisting of hexa(ethylene glycol) methyl ether methacrylate (hydrophilic and thermo-responsive) and 2-(acetoacetoxy)ethyl methacrylate (hydrophobic and metal-chelating) synthesized by reversible addition-fragmentation chain transfer polymerization has been used to prepare polymer-coated magneto-active SWCNTs decorated with iron oxide nanoparticles. Further to the characterization of the compositional and thermal properties using transmission electron microscopy, Fourier transform infrared spectroscopy, X-ray diffraction spectroscopy and thermal gravimetric analysis, assessment of the magnetic characteristics by vibrational sample magnetometry disclosed superparamagnetic behavior at room temperature. The latter, combined with the thermo-responsive properties of the polymeric coating and the unique, inherent properties of the carbon nanotubes may allow for their future exploitation in the biomedical field. © 2011 Wiley Periodicals, Inc. J Polym Sci Part B: Polym Phys 49: 1389–1396, 2011

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