Journal
JOURNAL OF NANOPARTICLE RESEARCH
Volume 15, Issue 10, Pages -Publisher
SPRINGER
DOI: 10.1007/s11051-013-1988-4
Keywords
Fe3O4 nanoparticles; Polyaniline hollow sphere; Nanocomposite; Polyelectrolyte; Microwave absorption
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Funding
- Grants for Excellent Graduate Schools, MEXT, Japan
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Highly regulated Fe3O4-polyelectrolyte-modified polyaniline (Fe3O4-PE@PANI) hollow sphere nanocomposites were successfully synthesized using an electrostatic self-assembly approach. The morphology and structure of the Fe3O4-PE@PANI nanocomposites were characterized using field-emission scanning electron microscopy, transmission electron microscopy, Fourier-transform infrared spectroscopy, X-ray powder diffraction, thermogravimetric analysis, and X-ray photoelectron spectroscopy. The results showed that the as-prepared nanocomposites had well-defined sizes and shapes, and the average size is about 500 nm. The assembly process was investigated. Magnetization measurements showed that the saturation magnetization of the nanocomposites was 38.6 emu g(-1). It was also found that the Fe3O4-PE@PANI nanocomposites exhibited excellent reflection loss abilities and wide response bandwidths compared with those of PANI hollow spheres in the range 0.5-15 GHz. The Fe3O4-PE@PANI nanocomposites are, therefore, promising for microwave absorption applications.
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