A5091490872- Copper-based nanomaterials and applications
- Quantum Dots Synthesis And Properties
- Magnetic Properties and Synthesis of Ferrites
- Multiferroics and related materials
- Chalcogenide Semiconductor Thin Films
- Thermal Expansion and Ionic Conductivity
- Iron oxide chemistry and applications
- ZnO doping and properties
- Polymer Nanocomposite Synthesis and Irradiation
- Advancements in Battery Materials
- Magnetic and transport properties of perovskites and related materials
- Transition Metal Oxide Nanomaterials
- Dielectric materials and actuators
- Conducting polymers and applications
- Advanced battery technologies research
- Luminescence Properties of Advanced Materials
- Advanced Condensed Matter Physics
- X-ray Spectroscopy and Fluorescence Analysis
- Advanced Photocatalysis Techniques
- Solid-state spectroscopy and crystallography
- Glass properties and applications
- GaN-based semiconductor devices and materials
- Dielectric properties of ceramics
- Gas Sensing Nanomaterials and Sensors
- Crystal Structures and Properties
Taif University
2017-2024
Moscow State University of Civil Engineering
2024
Aswan University
2024
Ain Shams University
2009-2021
Division of Chemistry
2016
Elettra-Sincrotrone Trieste S.C.p.A.
2012-2014
Sohag University
2008-2009
University of Trento
2007-2009
Nano gadolinium oxide doped polyvinyl alcohol/polyethylene glycol blend (PVA/PEG) was prepared by sol–gel and casting methods. Rietveld refinement method used for structural microstructural investigation. The X-ray diffraction (XRD), scanning electron microscope (SEM) Fourier transform infrared (FTIR) techniques were applied to study the formation of nano Gd2O3 PVA/PEG-blend. Differential calorimetry technique (DSC) utilized investigate glass transition, melting degradation temperatures...
Abstract PVA/PVP blend embedded with different ratios of nano Cu 0.9 Mn 0.1 S (Cu/MnS) was prepared thermolysis and casting techniques. X‐ray diffraction analysis showed the formation Cu/MnS as a single hexagonal phase an average crystallite size 11 nm. Scanning electron microscope (SEM) revealed nearly homogenous particles morphology. Fourier transform infrared (FTIR) spectroscopy technique applied to characterize doped matrix. UV measurements were utilized investigate optical properties in...
Thin films of In2O3 and doped with Ag+ or Cu2+ were assembled by spray pyrolysis from aqueous solution at 450 °C. The microstructure analysis optical properties investigated using XRD, SEM, EDX UV–Vis. spectrophotometer. XRD proved that Ag-doping greatly reduces the crystallites sizes 96 nm to 59 nm. However, Cu-doping has less pronounced effect on crystallite than Ag doping. band gap energy decreases both change in lattice parameter cubic Cu substitutions is compatible ionic radius...
GaFe 1−x V x O 3 samples (x = 0, 0.3) were manufactured through the solid-state reaction process. The phase singularity in each sample was tested using search-match HighScore software. structural/microstructural parameters of determined Fullprof program based on Rietveld refinement methodology. cation distribution across four crystallographic sites GaFeO lattice determined. integration vanadium into results alterations distribution, inducing distortions bond lengths and angles tetrahedral...
Abstract The structure modification of polyvinyl alcohol (PVA) polymer upon blending with polyethylene glycol (PEG) and/or doping lithium bis(trifluoromethane) sulfonimide (LiTFSI) salt was examined. minimum direct optical energy gap values 4.28 and 4.35 eV were achieved in 0.7 PVA-0.3 PEG blended polymers 0.9PVA-0.1 PEG/LiTFSI polymers. highest refractive index (n) 0.7PVA-0.3PEG (2.206) 0.9PVA-0.1PEG/LiTFSI (2.194) polymer. nonlinear parameter recorded polymers, respectively. All...
The structural properties of zinc ferrite nanoparticles with spinel structure dispersed in a highly porous SiO2 aerogel matrix were compared bulk sample. In particular, the details cation distribution between octahedral (B) and tetrahedral (A) sites determined using X-ray absorption spectroscopy. analysis both near edge extended fine indicates that degree inversion structures varies particle size. microcrystalline sample, Zn2+ ions are at trivalent Fe3+ occupy (normal spinel). When size...
Extended x-ray absorption fine structure has been measured at the $K$ edge of copper in ${\text{CuScO}}_{2}$ and ${\text{CuLaO}}_{2}$ to investigate local origin negative thermal expansion (NTE) along $c$ axis. A positive Cu-O bond within entire temperature interval be contrasted with distance between average atomic positions by diffraction; inadequacy riding correction diffraction data evidenced. The weak dependence parallel mean-square relative displacement (MSRD) indicates a rather stiff...
The effect of microstructure and chemistry on the kinetics passive layer growth passivity breakdown some Ti-based alloys, namely Ti-6Al-4V, Ti-6Al-7Nb TC21 was studied. rate pitting corrosion evaluated using cyclic polarization measurements. Chronoamperometry applied to assess breakdown. Microstructure influence uniform these alloys also investigated employing dynamic electrochemical impedance spectroscopy (DEIS). Corrosion studies were performed in 0.9% NaCl solution at 37 °C, obtained...
Stable silica-supported gold nanoparticles (AuNPs) suitable for catalysis applications were conveniently obtained in a straightforward, one-step synthesis by simply adding an aqueous solution of HAuCl4 to commercial polyethyleneimine-functionalized silica beads (SiO2-PEI) as the only reactant without any external reducing agent and/or conventional stabilizing moieties. Six different types AuNPs/(SiO2-PEI) termed Aux–yh, where x is initial concentration (1, 5, or 10 mM) and y reaction time (1...
Nd0.6Sr0.4MnO3 polycrystalline manganite was synthesized by two different methods: the auto-combustion reaction (NSMO-AC) and sol-gel method (NSMO-SG). The structural, magnetic, magnetocaloric critical behavior of samples were examined. Rietveld refinements XRD patterns revealed that both compounds are pure single phase indexed to orthorhombic system adopting Pnma space group. nanometric size estimated using Williamson-Hall confirmed TEM micrographs. Magnetic measurements as a function...