Structural, optical and magnetic properties of SnO₂ quantum dot

High crystalline rutile nano sized tin oxide SnO₂ nanoparticles have been synthesized by microwave irradiation technique with the assistance of Cetyl Tributyl Ammonium Bromide (CTAB). The addition of surfactant CTAB resulted in a strong variation of particle size. The presence of CTAB during the solvothermal synthesis considerably affects the morphology, band gap, fluorescence emission and magnetic property. The X-ray diffraction patterns reveal pure rutile-type tetragonal phase SnO₂ nanoparticles. The transmission electron microscopy result shows the formation of spherical shaped SnO₂ quantum dots of size about 4 nm. Noticeable morphological changes were observed by scanning electron microscopy. The functional groups were analyzed using Fourier Transform Infrared Spectroscopy studies. Optical studies were carried by UV–Visible Spectroscopy and Fluorescence Spectroscopy. Electron Paramagnetic resonance was used to calculate the Lande splitting factor ‘g’. The magnetic properties of the nanoparticles were studied by using Vibrating Sample Magnetometer.