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Title: Magnetic and electrical properties of polypyrrole-coated γ-Fe2O3 nanocomposite particles
Authors: Xiaotun, Y. 
Lingge, X.
Choon, N.S. 
Hardy, C.S.O. 
Issue Date: Jun-2003
Citation: Xiaotun, Y., Lingge, X., Choon, N.S., Hardy, C.S.O. (2003-06). Magnetic and electrical properties of polypyrrole-coated γ-Fe2O3 nanocomposite particles. Nanotechnology 14 (6) : 624-629. ScholarBank@NUS Repository.
Abstract: In this paper, we report the synthesis of well defined nanocomposite particles of polypyrrole (PPy) coated γ-Fe2O3. The nanocomposites with different γ-Fe2O3 contents are generated by microemulsion polymerization of pyrrole by dispersing γ-Fe2O3 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-Fe2O3-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-Fe2O3 content.
Source Title: Nanotechnology
ISSN: 09574484
DOI: 10.1088/0957-4484/14/6/311
Appears in Collections:Staff Publications

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