Effect of Zn Doping on the Material Properties of SnO2 Nanocrystals
We report the results of an ongoing investigation of the nanoscale semiconducting metal oxide (SnO2) and the effect of replacing tetravalent Sn4+ ions by divalent Zn2+ ions on their optical, magnetic and structural properties. Samples of zinc-doped tin (IV) oxide (ZnxSn1-xO2) crystalline nanoparticles have been made in a forced hydrolysis method. Preliminary experiments using x-ray diffraction (XRD) show the rutile tetragonal phase of SnO2 and show change in particle size with increasing zinc content with no secondary phase. Investigations of their magnetic properties using a vibrating sample magnetometer (VSM) show the emergence of novel magnetic properties with increasing doping content. X-ray photoelectron spectroscopy (XPS) was used to determine the elemental composition and the accurate Zn dopant concentration. At higher Zn doping concentrations, a fraction of the Sn4+ ions on the surface of the ~3nm particles change to Sn2+ ions. Details and more characterization techniques of these results will be presented.
Franco, Nevil and Reddy, K. M., "Effect of Zn Doping on the Material Properties of SnO2 Nanocrystals" (2014). College of Arts and Sciences Presentations. 5.