Browsing by Author "Akkaya Arier, Ümit Özlem"
Now showing items 1-6 of 6
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Characterization of MWCNT-TiO2 Qps and TiO2 QDs in self-assembled films
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Publisher and Date:(Elsevier, 2017)In this study the solution which includes TiO2 quantum dots (QDs) was mixed with the multi-wall carbon nanotubes (MWCNTs) to prepare MWCNT-TiO2 QDs composite films. The effect of microstructures on the structural and optical properties of MWCNT-TiO2 QDs composite films was evaluated. The activation energy for crystallite growth of TiO2 QDs which are produced in brookite phases was calculated as 20.3 kJ/mol. The properties of MWCNT-TiO2 QDs composite films were characterized by X-ray diffraction ...
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Effects of Precursor Parameters on the Optical and Electrical Properties of AZO Nano-Composite Films
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Publisher and Date:(Elsevier GMBH Urban & Fischer Verlag, 2016)Al doped ZnO (AZO) nano-composite films were synthesized on glass substrates with the sol gel spin coating method at the room temperature. The activation energy of AZO nano-composite films was calculated to be 49 kj/mol for the particles growth. The electrical structural and optical properties of AZO films were determined by changing ZnO:water and ZnO:Al ratios. ZnO:water and ZnO:Al ratios play an important role in controlling the electrical conductivity of the AZO nano-composite films. The optimum ...
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Structural and optical properties of SnO2 nano films by spin-coating method
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Publisher and Date:(Elsevier Science Bv, 2015)In this work tin oxide (SnO2) nano films were deposited on glass substrates with different water content using the sol-gel spin-coating method. SnO2 is a wide band gap semiconductor and it belongs to the class of transparent conductive oxides (TCO). The influence of the water content and the heat treatment temperature on the structural and optical properties of the thin films is characterized by X-ray diffractometer (XRD) scanning electron microscope atomic force microscope ultraviolet visible ...
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Tailoring The Electrical and Optical Properties of Carbon Nanotube Reinforced Transparent Tio 2 Composites by Varying Nanotube Concentrations
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Publisher and Date:(World Scientific Publ Co Pte Ltd, 2019)In the present work multi-walled carbon nanotube (MWCNT)-doped TiO 2 nanocomposite films were synthesized by sol-gel method. The influence of nanotube concentration on the structural electrical and optical properties of the films was investigated. The beneficial effects of the addition of carbon nanotubes into a TiO 2 film and titania-coated MWCNTs have much in common. On the other hand this work contributes to the previous studies in terms of the optical and electrical properties of MWCNT. For ...
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The effects of Dea:water ratio on the properties of ZnO nanofilms obtained by spin coating method
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Publisher and Date:(Elsevier Science, 2014)In this work the ZnO were fabricated with the sol-gel spin coating method and the effects of the Dea:water ratios on the properties of the as-prepared ZnO thin films were determined by using a X-ray diffractometer transmission electron microscope scanning electron microscope atomic force microscope ultraviolet-visible spectrophotometer and spectrophotometer. Experimental results indicated that the Dea:water ratio affected the structural and optical properties of the ZnO films considerably. The ...
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The Electrochromic Performances of Single Phase VO2 Nanoparticled Films
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Publisher and Date:(Elsevier Science SA, 2016)In the present work pure phase vanadium oxide VO2 nanoparticled films were synthesized using acetate based sol-gel precursors. The effect of the water: Vanadyl acetylacetonate ratio on electrochemical and structural properties of nanostructured vanadium oxide films was examined. The X-ray diffraction studies indicated that very strong crystallization of the VO2 monoclinic phase occurred for the as-deposited films at the annealing temperature of 500 degrees C. According to the atomic force microscopy ...
