One-Pot Synthesis of Multifunctional Magnetite Hollow Nanospheres

Abstract

Monodispersed Fe₃O₄ nanospheres with hollow interior structures are synthesized without any template. Inexpensive and nontoxic reagents such as FeCl₃-6H₂O and ammonium acetate are used in the ethylene glycol (EG) solution. The hollow structure is formed based on the aggregation of many primary particles, followed by Oswald ripening process. Those nanoparticles exhibit a ferromagnetic behavior with a high saturation magnetization of 81.0 emu/g^-1.