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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Chaudhuri, S.
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (6/6 displayed)
- 2024Investigation of the effect of pitting corrosion on the fatigue strength degradation of structural steel using a short crack model
- 2023Quantitative analysis of the correlation between geometric parameters of pits and stress concentration factors for a plate subject to uniaxial tensile stresscitations
- 2021Half metallicity in Cr substituted Fe 2 TiSncitations
- 2015Templated growth of II-VI semiconductor optical fiber devices and steps towards infrared fiber lasers
- 2014Capacitively coupled electrolyte-conductivity sensor based on high-k material of barium strontium titanatecitations
- 2005Photoluminescence and Raman study of CdS-Al 2O 3 nanocomposite films prepared by sol-gel techniquescitations
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article
Photoluminescence and Raman study of CdS-Al 2O 3 nanocomposite films prepared by sol-gel techniques
Abstract
<p>The optical and microstructural properties of CdS-Al <sub>2</sub>O <sub>3</sub> nanocomposite (CdS-Al <sub>2</sub>O <sub>3</sub> = 20:80 to 50:50) thin films synthesized by sol-gel techniques were studied. Optical transmission spectra indicated a marked blue shift of the absorption edge due to quantum confinement. Band gaps of CdS-Al <sub>2</sub>O <sub>3</sub> nanocomposites were found to vary in the range 3.69-2.61 eV. The sizes of the nanocrystals, estimated from the blue shift (0.2-1.2 eV) of the absorption edges and transmission electron microscopy, were found to vary in the range 2.8-7.0 nm. X-ray diffraction studies showed reflections from (111), (200), (220), and (311) planes of CdS in the cubic phase. Microstructural characterization by high-resolution transmission electron microscope (HRTEM) indicated well crystallinity of the nanoparticles and lattice fringes supported the cubic phase of CdS. Raman spectroscopy was carried out for CdS-Al <sub>2</sub>O <sub>3</sub> nanocomposites, which indicated a prominent peak at ∼299 cm <sup>-1</sup>. Significant changes in the peak position and intensity of the Raman peak were observed with varying the annealing temperature (373-573 K). Photoluminescence measurements indicated a prominent broad peak at ∼1.81 eV due to the surface defects in the CdS nanocrystallites. The present study revealed Al <sub>2</sub>O <sub>3</sub> to be a good capping material for CdS nanoparticles.</p>