OICC Press Journal of Nanostructure in Chemistry 2193-8865 3 1 (December 2013) 2013 08 29 A facile one-step synthesis of PTSA-doped tetraaniline nanostructure/magnetite nanoparticles via self-assembly method 10.1186/2193-8865-3-74 EN Keloth Basavaiah Department of Inorganic and Analytical Chemistry, Andhra University, Visakhapatnam, Andhra Pradesh, 530003, IN Yarramsetti Pavankumar Department of Inorganic and Analytical Chemistry, Andhra University, Visakhapatnam, Andhra Pradesh, 530003, IN Alamanda Vara Prasada Rao Department of Inorganic and Analytical Chemistry, Andhra University, Visakhapatnam, Andhra Pradesh, 530003, IN Journal Article 2013 08 29 Abstract Tetraaniline nanostructures/magnetite nanoparticles (Fe 3 O 4 NPs) have been prepared via in situ self-assembly method using ammonium persulphate as an oxidant in the presence of p -toluene sulphonic acid as a dopant as well a soft template. The effect of the concentration and molar ratio of p -toluene sulphonic acid to aniline on the morphology and size of the nanostructures, and the crystallinity, thermal stability and magnetic properties of the nanocomposites have been studied by UV-visible spectroscopy, Fourier transform infrared spectroscopy, X-ray diffraction, scanning electron microscopy, transmission electron microscopy, thermogravimetric analysis and vibrating sample magnetometry. The spectroscopic results indicated the interaction between the tetraaniline nanostructures and the Fe 3 O 4 NPs. The microscopic results show that the Fe 3 O 4 NPs were coated on tetraaniline nanostructures. The saturation magnetization values and the thermal stability of the nanocomposites were found to depend on the molar ratio of p -toluene sulphonic acid to aniline.