Abstract
ZnFe2O4 particles have drawn much attention due to their low toxicity and soft ferrite nature, but the low saturation magnetization limits their bio-applications. Herein, the heat treatment was employed to improve the saturation magnetization of ZnFe2O4 particles synthesized by hydrothermal method. After heat treatment, the saturation magnetization of ZnFe2O4 increases from 11.1 emu/g to 126.0 emu/g after heat treatment at 1200 °C, which is the maximum one reported up to now. The XRD and XPS analyses suggest that the increment in saturation magnetization may result from the migration of Zn2+ from A-site to B-site incurred by the heat treatment. According to the results of the magnetic heating studies, the saturation magnetization enhancement increased ZnFe2O4 heating efficiency. The in vitro cell experiments demonstrate the obtained ZnFe2O4 magnetic particles exhibit negligible cytotoxicity to HaCaT cells.
Published Version
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