وائل سعد محمد أحمد

مدرس - فيزياء المواد والنانوتكنولوجي

كلية العلوم

العنوان: سوهاج - ساقلته



السلام عليكم ورحمة الله وبركاته

2018-09-23 12:35:56 | الكلمات المفتاحية CdTe thin films,
Effect of CdCl2 heat treatment in (Ar + O2) atmosphere on structural and optical properties of CdTe thin films
Cadmium telluride (CdTe) thin films were deposited by thermal evaporation method under base pressure 2 ×10−5 mbar on corning glass substrate. In this work, we study the effect of cadmium chloride (CdCl2) heat treatment in argon and oxygen (Ar + O2) atmosphere on the structural, morphological and optical properties of CdTe thin films to achieve high quality thin film absorber ... إقراء المزيد

2018-09-23 12:30:40 | الكلمات المفتاحية X-ray diffraction Transmission,
Synthesis, characterization and photocatalysis enhancement of Eu2O3-ZnO mixed oxide nanoparticles
Pure ZnO nanoparticles (NPs) and mixed Eu2O3 and ZnO NPs with different Eu2O3 ratios (5%, 10%, and 15%) were synthesized by a precipitation method under optimum conditions. The synthesized samples were characterized by means of X-ray diffraction, scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy, transmission electron microscopy (TEM), Fourier transform infrared (FTIR) spectroscopy,Raman spectroscopy, and UV–vis diffuse reflectance spectroscopy. The ... إقراء المزيد

2018-09-23 12:41:03 | الكلمات المفتاحية photocatalyst,
α-Bi2O3 nanorods: synthesis, characterization and UV-photocatalytic activity
In this study, Monoclinic bismuth oxide nanorods (α-Bi2O3 NRs) were successfully synthesized by a simple one-step hydrothermal route using (water: ethanol) (1:1) as a mixed solvents at optimum conditions. The Bi2O3 nano-powder was characterized in detail by different techniques in terms of their structural, morphological, compositional, optical and photocatalytic properties. X-ray diffraction (XRD) analysis indicated that the as-synthesized Bi2O3 NRs ... إقراء المزيد

2018-09-23 12:38:15 | الكلمات المفتاحية CdS thin films,
Influence of (Ar + O2) atmosphere and CdCl2 coating heat treatment on physical properties of CdS thin film for solar cell applications
Cadmium sulphide (CdS) thin films have been grown on corning glass substrate by thermal evaporation technique under base pressure 2 × 105 mbar. In this study we investigate the influence of Cadmium chloride (CdCl2) heat treatment and argon and oxygen (Ar + O2) annealing on the structural, morphological optical and electrical properties of CdS thin films to achieve high quality ... إقراء المزيد

2018-09-23 18:57:42 | الكلمات المفتاحية soft phonon,
Hardening of the soft phonon in bulk SrTiO3 interfaced with LaAlO3 and SrRuO3
The low-temperature softening of the TO1 phonon of SrTiO3 (STO), which determines its incipient ferroelectricity, is known to be partially hindered either in the bulk under strong electric fields, or in thin STO films. Here we show, by terahertz (THz) reflectivity measurements, that a similar effect is produced in bulk STO and at zero static field by ultrathin metallic films ... إقراء المزيد