Synthesis of Superparamagnetic Zinc Ferrite Encased Fluorapatite Nanoparticles and Its Cytotoxicity Effects on MG-63 Cells

Zinc ferrite (ZnFe 2 O 4 ) nanoparticles encased fluorapatite (FAP) nanorods was successfully synthesized through hydrothermal method for biomedical applications. TEM image revealed the formation of ZnFe 2 O 4 nanoparticle encased FAP nanorods with average size of about 60 ± 40 nm. Both ZnFe 2 O 4 and ZnFe 2 O 4 –FAP samples exhibited superparamagnetic nature at 300 K with saturation magnetization ( Ms ) of 28.41 and 4.13 emu/g, respectively. Further, the superparamagnetic property of the ZnFe 2 O 4 was investigated using langevin function and average magnetic moment per particle was found to be 606 μ_B . ZnFe 2 O 4 –FAP nanorods exhibited enhanced colloidal stability when compared to ZnFe 2 O 4 nanospheres. The cytotoxicity results confirmed the enhanced cell viability (86