An Investigation Of Physical Properties Of Group Iı-Vı Nanowires Obtained With Catalytic Growth.
In the study; ZnS nanostructures were successfully synthesized by a simple and low cost process based on Vapour- Liquid – Solid technique (VLS). 99,99% purity ZnS powder was evaporated at two temperatures, 10000C and 11000C and was carried by Argon (Ar) gas flow and then was condensed on Gold (Au) coated Silicon (Si) substrates. Structural characterization of the produced nanostructures were carried out by Scanning Electron Microscopy (SEM), Energy Dispersive Spectroscopy (EDS) and X-Ray Diffraction (XRD). The results of SEM studies revealed that the morphology of the nanostructures are in form of belt, rod, ribbon, wire and saw like, all having different sizes and diameters. According to EDS analysis, these structures consist of Zinc (Zn) and Sulfide (S). Silicon (Si) and Gold (Au) and Oxygen (O) were also seen in EDS spectrum. Presence of O is probably due to unwanted air in the process tube. From the XRD patterns, it is obtained that the all synthesized nanostructures were in wurtzite crystal structure. Spectral dependence of Photoluminecence (PL) were also carried out for optical characterization. The results indicate that the band gap energy of bulk ZnS which is 3,68eV changes from 3,7eV to 3,82eV depending on the thickness of the structures.
AYDOĞMUŞ Fatma ,
Danışman :Prof. Dr. K. Gediz AKDENİZ
Anabilim Dalı :Fizik
Programı (Varsa) :Yüksek Enerji ve Plazma Fiziği
Mezuniyet Yılı :2007
Tez Savunma Jürisi :Prof. Dr. K. Gediz AKDENİZ (Danışman)
Prof. Dr. Şehsuvar ZEBİTAY
Prof. Dr. Emine RIZAOĞLU
Prof. Dr. Haşim MUTUŞ
Doç. Dr. Hasan TATLIPINAR
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