Abstract
ABSTRACT In the present study, pure iron oxide (magnetite, Fe3O4) and Samarium doped iron oxide nanoparticles were synthesised by Sol-Gel technique. The synthesised nanoparticles were characterised by X-ray powder diffraction, Transmission Electron Microscopy, X-ray Photoelectron Spectroscopy, UV-Visible diffuse reflectance spectroscopy, FTIR and Vibrating Sample Magnetometer. From the XRD data the crystallite size of pure magnetite nanoparticles was found to be around 16 nm for the sample calcined at 400 ºC and for different concentration of Samarium doped NPS was found to be 13, 7.3 and 6.7 nm, respectively. TEM images show nanoparticles of cubic structure with a size comparable to that of calculated using XRD. The bandgap energy of pure Fe3O4 nanoparticles was calculated from UV-DRS spectra and it was found to be around 2 eV. It’s found to be, Samarium doped Fe3O4 nanoparticles were superparamagnetic with high magnetic saturation which can be used for biomedical applications like hyperthermia and MRI.
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