Characterization of Fe3O4 nano particles for biomedical applications

Nano particles of Fe₃O₄ with the range of 30 and 60 nm were synthesized by using chemical coprecipitation method. Particle size effects according to magnetic properties were investigated together with the constant reaction and crystallization temperature. According to calculations peaks were indexed as cubic Fe₃O₄ for all samples. The hysteresis loops shows superparamagnetic behavior. It was found that when Fe²⁺/Fe³⁺ ratio increase to 50% the particle size increases approximately one fold. We realized that chemical coprecipitation method is suitable for biomedical applications of Fe₃O₄ nano particles.