New nanocomposites based on “tailor dressed” magnetic particles in a polypyrrole matrix


  • We are greatly indebted to Mrs. Carpentier for technical assistance. We also thank Prof. R. Massart for helpful discussions.


Nanometer-sized magnetic particles can be included into polypyrrole to produce composites by means of a novel method involving ferrofluids, in which a magnetic core such as γ-Fe2O3 is surrounded by an anionic complexing shell (see Figure). This organic coating, leading to the formation of a macroanion, allows the ion to act as a classical doping ion during the polymerization.

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