Fabrication and Characterization of Cobalt Iron Oxide Nanoparticles by a Reverse Micelle Process

The preparation of CoFe₂O₄ nanoparticles in Igepal CO-520-cyclohexane-water reverse micelle solutions has been studied. Transmission electron microscopy and X-ray diffraction pattern analyses revealed the resultant particles to be CoFe₂O₄. The average size and distribution of synthesized particles calcined at 600⁰C for 2 hrs were in the range of 30 to 70 nm and broaden, respectively. The phase of synthesized particles was crystalline. The magnetic behavior of the synthesized particles was ferromagnetism. The effects of synthesis parameters, such as the molar ratio of water to surfactant and calcination temperature, are discussed