A5070010464- ZnO doping and properties
- Gas Sensing Nanomaterials and Sensors
- Copper-based nanomaterials and applications
- Terahertz technology and applications
- 2D Materials and Applications
- Chalcogenide Semiconductor Thin Films
- Transition Metal Oxide Nanomaterials
- Perovskite Materials and Applications
- Quantum Dots Synthesis And Properties
- Ga2O3 and related materials
- Superconducting and THz Device Technology
- MXene and MAX Phase Materials
- Plasmonic and Surface Plasmon Research
- Semiconductor materials and devices
- Advanced Semiconductor Detectors and Materials
- Electronic and Structural Properties of Oxides
- Analytical Chemistry and Sensors
- Magneto-Optical Properties and Applications
- Electrochemical sensors and biosensors
- TiO2 Photocatalysis and Solar Cells
- Electromagnetic wave absorption materials
- Allergic Rhinitis and Sensitization
- Spectroscopy and Laser Applications
- Radio Frequency Integrated Circuit Design
- Conducting polymers and applications
Mustansiriyah University
2019-2024
Philipps University of Marburg
2016-2018
Monolayers of transition-metal dichalcogenides such as WSe2 have become increasingly attractive due to their potential in electrical and optical applications. Because the properties these 2D systems are known be affected by surroundings, we report how choice substrate material affects monolayer WSe2. To accomplish this study, pump-density-dependent micro-photoluminescence measurements performed with time-integrating time-resolving acquisition techniques. Spectral information power-dependent...
Undoped and Mn-doped zinc sulfide thin films were prepared on glass substrate by spray pyrolysis technique (SPT). XRD, AFM UV–visible spectra measurements done to explore the effect of doping structural optical properties ZnS films. X-ray diffraction illustrates polycrystalline nature increases via increasing Mn doping. Crystallite size evaluated Scherrer's formula shows with Average diameter for undoped is 84·78 nm it 96·93 3%Mn-doped ZnS. As concentration band gap decreases.
In this study, were investigated structural, optical properties and morphological of Te Nano-thin films with different thicknesses by Chemical spray pyrolysis (CSP) method. The structural the studied as a dopant at 150-450 thicknesses. characterized XRD to study film structure. It was observed that hexagonal wurtzite structure ZnO for all samples. exhibited (102) preferential growth in Grain size values calculated from Scherrer’s formula, varied range (96-84) nm. band gap energy respectively...
On a glass substrate, zinc oxide nanorods (ZnO NRs) arrays of varying aspect ratios have been grown by hydrothermal method at 90 ᴼC with variable ZnO seed layer thicknesses applied RF sputtering. The structural properties and gas sensitivity were studied using X-ray diffraction (XRD) for analyzing the characteristics was discovered that NRs films are both polycrystalline, same plane preferred reflection (002). layer's crystallite size ranges from 19.51 nm to 30.45 t1 t4, respectively....
Developing nano-liquid materials with ultra-low concentrations leads to new or improved methods, as well resolving issues in previous studies. Nano-liquid require special treatment because they are very sensitive materials. Many techniques have been developed, including the optical cavity technique, which depends on increasing path length of light beam between two dielectric mirrors obtain more accurate and measurements. This method also provides beneficial information about chemical...
Abstract In this study, were investigated structural, optical properties and morphological ofZnO Te-doped ZnO Nano-thin films deposited by Chemical spray pyrolysis(CSP) method. The structural of studied as pure Te dopant at concentration 2 4%. characterized XRD to study the structure films. It was observed that hexagonal wurtzite for all samples. exhibited (102) preferential growth in ratios. Grain size values calculated fromScherrer’s formula varied range (79-113) nm. band gap energy...
Zinc oxide (ZnO) nanostructures were deposited on glass substrates by physical vapor deposition technique.To improve the crystallinity of ZnO, oxidation treatment was conducted at 400 • for 1 h in an atmospheric environment.The films characteristics examined X-ray diffraction, ultraviolet-visible spectroscopy, atomic force microscopy, and scanning electron microscopy.The diffraction results illustrated that have a polycrystalline hexagonal structure.The spectrum showed transmittance ZnO film...
Abstract In this research, Co3O4:Ni thin films have been prepared by a chemical spray pyrolysis method (CSPM). The synthesized samples, structure and morphology of creating were characterized X-ray diffractions (XRD), Atomic Force Microscopy (AFM). impacted Ni concentration changed from 0 to 4 % XRD results cause increasing the crystallite size, while Microstrain dislocation density are decreasing. Furthermore, AFM imaging shows Co3O4:Nithin involving classic amorphous polymer-metal complex...
Structural and optical properties of undoped NiO Li doped thin films at a volumetric content (1% 3%) by spray pyrolysis (SPT) were thoughtful. X-ray diffraction patterns indicate that deposited are cubic polycrystalline with dominant peak (101) plane. The study assure doping did not affect the structure or peak. Average crystallite size was set to be in range 11.08– 21.76 nm an average roughness (0.33-0.59) evaluated atomic force microscopy. Transmittance values reaches 85% Vis-NIR regions....
Abstract Nanostructured copper oxide (Cu 2 O) and cobalt doped (Co:Cu O)thin films were prepared at varying doping by spray pyrolysis technique(SPT). X-ray diffraction patterns investigate t structural properties. Surface topography was studied using Atomic Force Microscopy (AFM). Transmittance spectra determined a UV-Vis spectrophotometer the results showed that pure Co Cu O Nanostructures have bandgap values between (2.56 - 2.85) eV.
There continues to be a need for an in-situ sensor system monitor the engine oil of internal combustion engines. Engine needs monitored contaminants and depletion additives. While various systems have been designed evaluated, there is still develop evaluate new sensing technologies. This study evaluated Terahertz time-domain spectroscopy (THz-TDS) identification estimation glycol contamination automotive oil. Glycol result gasket or seal leak allowing coolant enter mix with An intended use...
تم تحضير تراكيب نانوية (زهرية وعصي) الشكل من اكسيد الزنك بالطريقة الحرارية المائية عند 90 درجة مئوية لمدة ثلاث ساعات. ثلاثة محاليل بقيم الحامضية 9 و10 و11 وبمولارية 0.028 مولاري، على قواعد زجاجية / بذور ZnO. كان لجميع العينات المحضرة نمط حيود متعدد التبلور مع سائد المستوى (002). زيادة الحامضية، زاد حجم البلوري إلى حد أقصى قدره 37.6 نانومتر. أظهرت صور الانبعاث الحقلي لمجهر الماسح الإلكتروني تكمن اهمية البحث في انماء مختلفة خلال التحكم بدرجة حيث النتائج ظهور زهرية 11 وبحجم جسيمي 100-800...
Abstract This paper presents a significant effect of manganese ferrite nanoparticles (MnFe 2 O 4 NPs) on the increase surface photoconductivity semiconductors. Herein, optical characterization photo-excited carriers silicon coated with MnFe NPs was studied by using THz time-domain spectroscopy (THz-TDs). We observed that provided significantly enhanced attenuation radiation in comparison bare substrates under laser irradiation. The experimental results were assessed context band structure...
ABSTRACT We report on a terahertz (THz) time‐domain system to characterize photoconductive THz emitters and detectors, that is designed for highest reproducibility. This excellently suited studying the performance of sources detectors in systematic manner, either by varying substrate materials or geometrical parameters metallic antenna contacts building switch. After confirming reproducibility stability with errors only 1.9% (over 3 h) 2.6% 9 days), we use compare five low temperature grown...
In this study, RF-sputtering was used to hydrothermally produce zinc oxide nanorods (ZnO NRs) on the seed layer of ZnO/Glass substrates. at different thicknesses (t1 = 1135 nm, t2 1306 t3 1437 t4 1533 nm). The structural properties were studied by X-ray diffraction, which showed that ZnO NRs and films are polycrystalline with same preferred reflection for (002) plane, grain size ranges between 19.51 nm 30.45 t1 t4, respectively. measurements FESEM aspect ratios ranging from 3.03 4.9 growth...
Abstract In this work, TiO nanostructure films were deposited via vacuum thermal evaporation at a temperature of 80°C. The thin annealed under for 1 h three different degrees (200, 300, and 400°C) in addition to the film prepared X-ray Diffraction (XRD) showed that all had anatase polycrystalline diffraction patterns with predominant reflection (200) plane. As result, particle size increased annealing temperature. Scanning Electron Microscopy (SEM) measurements 200°C, shape nanostructures...