온열치료용 SiO2/Fe2O3 나노복합입자의 제조와 특성

Abstract

The magnetic heating effect of SiO2 coated g -Fe2O3 nanocomposite particle due to magnetic relaxational loss of superparamagnetic regime was investigated by measuring the generated heat from nanocomposite particles in alternative applied magnetic fields. The commercial g -Fe2O3 nanoparticles were coated by SiO2 in water solution with TEOS and the synthesized nanocomposite powders and its magnetic properties were characterized and compared with the raw g -Fe2O3 nanoparticles. The 10~30 nm sized g -Fe2O3 nanoparticles were coated by 5 nm thickness of amorphous SiO2 film. The nanocomposite particle has very low Mr and Hc value showing superparamagnetic behavior. The magnetic heating effect of nanocomposite particle on surface coating phase of SiO2 was discussed in terms of superparamagnetic behaviors of each particles, and their potential for hyperthermia application was evaluated.