Thermo-magnetic stability of magnetic Fe₃O₄ nanoparticles for hyperthermia

Abstract

Abstract Monodispersed Fe 3 O 4 magnetic particles adsorbed by amylase (such as citric acid (CA), carboxymethyl chitosan (CMCH) and β-cyclodextrin (CD)) were prepared by means of co-precipitation method. The absorption character of the samples was investigated by FT-IR, TG and VSM. It was found that the carboxyl (COOH groups) of amylase reacted with the hydroxyl (OH groups) on the surface of Fe 3 O 4 particles, resulting in the formation of iron carboxylate that was adsorbed onto Fe 3 O 4 . The induction heating properties of the magnetic Fe 3 O 4 nanoparticles in an alternating current magnetic field were also investigated and the thermo-magnetic stability in induction heating was discussed.