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Optical and Structural Studies of Sol-Gel Deposited Nanostructured CdO Thin Films: Annealing Effect

100%
Abdolahzadeh Ziabari A., Ghodsi F.
Acta Physica Polonica A
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2011
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vol. 120
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issue 3
536-540
EN
Nanocrystalline CdO thin films were prepared by sol-gel dip-coating method using a different solution. The as-deposited films were subjected to drying temperature of 120° in air. The prepared films were annealed in different temperatures of 200, 300 and 400°C. The characterization of samples was carried out by X-ray diffraction, scanning electron microscopy and UV-VIS spectroscopy. Results show that the samples are polycrystalline in nature and the crystallinity of the films improves with temperature. The average grain size is in the range of 19-34 nm. It was observed that the optical parameters of the films were affected by annealing temperature.
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Effect of pH on the Optical Properties of Doped CdS (Cu, Fe) Nanoparticles Incorporated in TG as the Capping Agent

81%
Hasanzadeh J., Farjami Shayesteh S., Abdolahzadeh Ziabari A.
Acta Physica Polonica A
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2014
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vol. 126
|
issue 3
713-717
EN
Cu and Fe doped cadmium sulfide nanoparticles with controllable and relatively narrow size distribution were prepared using a facile and efficient wet chemical route by mixing the reactants in water solvent. It was found that the mixture pH plays an active role in the growth procedure of nanoparticles. Diverse physical properties of the prepared nanoparticles were investigated using UV-vis absorption, photoluminescence spectroscopy, scanning electron microscopy, transmission electron microscopy and energy dispersive X-ray spectroscopy. The average particle size of samples was estimated to be about 5 nm by using transmission electron microscopy measurement. The pH optimization study implies that pH ≈7 would yield an enhancement in photoluminescence intensity. There are two bands in photoluminescence spectra which related to deep and shallow traps.
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