R S Dariani and Z Nafari Qaleh
University of Alzahra, Iran
Posters-Accepted Abstracts: J Material Sci Eng
This research examines the structural and optical properties of titanium dioxide (TiO2) nanostructures. The production process of TiO2 nanostructures involves three steps. First, a thin film of titanium was deposited on substrates by electron beam evaporation technique under the pressure of 1.5��10-5 mbar. Then a layer of gold was deposited as a catalyst on the titanium layer by a sputtering method. At this stage, the sample was placed in a quartz tube furnace. A tablet containing Ti and graphite powder in a ratio of 1:1 as a source was located in the center of the furnace with a temperature of 1050�ºC. Substrate was placed over the quartz tube at a distance 12-13 cm from the center of the furnace with a temperature of 850�ºC and was kept for 1h under argon gas flow as a carrier gas. Now, the effect of carrier gas flow on TiO2 nanostructures properties was studied. Three samples were gained at gas flow 60, 110, and 170 sccm. The SEM images indicate that with increasing gas flow, nanowires become thinner and longer. According to energy gap, all the samples are characterized by higher value of the energy gap than that of bulk rutile TiO2.
R S Dariani has completed his PhD from University of New South Wales and Postdoctoral studies from Queen’s University School of Physics. Now he is Professor of Physics at Alzahra University and Editor in Chief of Alzahra University Journal of Applied Physics. He has got Third World Academy of Science (TWAS) grants for Spare Parts for Scientific equipment, Trieste, Italy, 2002 and Winner of the SVC best poster, The Society of Vacuum Coaters, Washington D. C., 2006. He has published more than 72 papers in reputed journals and serving as an Editorial Board Member of repute.
Email: dariani@alzahra.ac.ir
Journal of Material Sciences & Engineering received 3677 citations as per Google Scholar report
Spanish 
Chinese 
Russian 
German 
French 
Japanese 
Portuguese 
Hindi 