In this paper, we report the synthesis of well defined nanocomposite particles of polypyrrole (PPy) coated γ-Fe 2 O 3 . The nanocomposites with different γ-Fe 2 O 3 contents are generated by microemulsion polymerization of pyrrole by dispersing γ-Fe 2 O 3 in the oil phase. The structural properties of the nanocomposite particles thus obtained are characterized by FT-IR, thermal analysis, x-ray diffraction and transmission electron microscopy, which shows the size of the γ-Fe 2 O 3 –PPy nanocomposite particles is in the range of 10–20 nm. The magnetic and electrical properties of these particles are measured by vibrating sample magnetometry, Mössbauer spectroscopy and the four-point probe method which indicate that the nanocomposite particles are superparamagnetic and electrically conducting. The conductivity of the composite is independent of γ-Fe 2 O 3 content.
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Xiaotun et al. (2003) studied this question.
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