Magnetic nanocomposites based on polyaniline (PANI) and magnetite nanoparticles (Fe3O4NPs) have been prepared by an in situ self-assembly method in presence of dodecylbenzene sulfonic acid (DBSA) as dopant as well as surfactant. Influence of the aniline to DBSA molar ratio on morphology, magnetic properties, and thermal stability of PANI/Fe3O4NPs composites has been investigated. Spectroscopic results indicated the interaction between PANI nanorods and Fe3O4NPs. Scanning electron microscopy and transmission electron microscopy images indicated that PANI rods were decorated with Fe3O4NPs. Morphologies of nanocomposites were found to be critically dependent on molar ratios of organic acid to monomer. PANI nanorod/Fe3O4NPs composites showed superparamagnetism and higher thermal stability with small mass fraction of Fe3O4NPs.
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Basavaiah et al. (2012) studied this question.
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