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In the present work, surface modification of iron oxide (Fe 3 O 4 ) nanoparticles with biocompatible fluorapatite (FAP) coating achieved by a simple method and their characterizations using XRD, TEM, FT-IR, DSC and VSM are reported. TEM images revealed the spherical morphology of Fe 3 O 4 nanoparticle and rod-like FAP coated Fe 3 O 4 nanoparticles with size of about 12 and 30 nm, respectively. Magnetic measurements (M-H) of both the samples exhibited superparamagnetic behavior at 300 K. FAP coated Fe 3 O 4 nanoparticles enhance the cell viability and colloidal stability when compared to Fe 3 O 4 nanoparticles. These results demonstrate that FAP coated Fe 3 O 4 nanoparticles could be a suitable candidate for biomedical applications. [ABSTRACT FROM AUTHOR]

Magnetic nanoparticles (MNPs) functionalized with biocompatible surface find numerous applications in health care sectors including hyperthermia treatment. In the present study, we report the synthesis of nickel ferrite nanoparticles in calcium phosphate nanostructure via hydrothermal assisted wet precipitation method using sucrose as an organic modifier followed by rapid thermal processing. The phase composition, morphology and magnetic properties were further investigated through various characterization techniques. The obtained product exhibits ferromagnetic behaviour with coercivity of 0.045 T at 5 K and the superparamagnetic behaviour with zero coercivity at 300 K which suggests that it may be a potential material for hyperthermia treatment. [ABSTRACT FROM AUTHOR]