Font Size:     

 Superparamagnetic behavior of iron oxide has been commonly used in various application such as magnetic resonance imagining, repairing of tissues , drug delivery system, detoxification of blood cells and coating of shielding materials etc. All these biomedical application needs particle size less than 100nm, high surface area is required which gives better chemical and physical adsorption properties. A simple chemical route for the synthesis of γ-Fe₂O₃ nanoparticles by dispersion in 30% ammonium solution by sonication has been adopted in this study. Magnetic properties are improved with MnO coating. Which stabilize γ-Fe₂O₃ in normal conditions. Doping of Ag is done to modify the surface characteristic. The coated doped γ-Fe₂O₃ are characterize by using physical techniques XRD,SEM,FTIR and particle size analysis. The characterization technique validated that the particles obtain by wet precipitation method are homogeneous in structure and have a particle size less than 20nm.