Tariq Abdul-Hameed Abbas

Tariq Abdul-Hameed Abbas
Salahaddin University-Erbil | SUH · Department of Physics

Professor

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36
Publications
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214
Citations

Publications

Publications (36)
Article
Background The main objective of this work is the synthesis and evaluation of silver nanoparticles (Ag NPs) by using pulsed laser ablation of a silver (Ag) target in deionized water and examining their antibacterial activity. Methods Colloidal solutions of silver nanoparticles were prepared with different pulsed laser energies (620, 880, and 1000)...
Article
Full-text available
Recently, solvothermal technique was used to explore and construct 3D(micro/nano)V2O5 growth on (M-PSi) as a sensing gate for the pH EG-FET device. The sensor has high sensitivity and a linear response in the pH range of 2–12, as well as relatively high hysteresis. However, around pH 12, the membrane gradually degrades and redox species in solution...
Article
Full-text available
A heterostructure of (Au-NPs/MacroPSi) was synthesized by filtering a colloidal of gold nanoparticles (Au-NPs) into MacroPSi layer using high voltage electrophoretic deposition (HVEPD). The aim of that is to enhance the performance of MacroPSi used as a pH-EGFET sensor. For this purpose, the MacroPSi with an average pore size of 1.388 μm was synthe...
Article
In this study, a heterostructure of ZrO2-NPs/MacroPSi EGFET was reported to the detection of biologically important human metal ions such as Na+, K+, Ca2+, and Mg2+. Using the solvothermal technique, ZrO2 nanoparticles were synthesized on the surface and wall of MacroPSi. Field-emission scanning electron microscopy (FESEM) and X-ray diffractometer...
Preprint
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A heterostructure of (Au-NPs/MacroPSi) was synthesized by filtering a colloidal of gold nanoparticles (Au-NPs) into MacroPSi layer using high voltage electrophoretic deposition (HVEPD). The aim of that is to enhance the performance of MacroPSi used as a pH-EGFET sensor. For this purpose, the MacroPSi with an average pore size of 1.388 µm was synthe...
Article
Full-text available
In this work, V2O5 nanorods was prepared by thermal evaporation method followed by annealing at 550 °C in dry oxygen atmosphere for 60 min. X-ray diffraction (XRD) and field emission scanning electron microscopy (FESEM) were used to investigate the structure and surface characteristics of V2O5 nanorods. To comparatively analyze and find the best Oh...
Article
Full-text available
Using spray pyrolysis technique, crystalline nanostructured Nickel Oxide (NiO) films were synthesized on glass substrates with different molarities of hydrated nickel chloride salt precursors solution (NiCl2.6H2O) at various substrate temperatures. Characterizations of synthesized nanostructured NiO films were investigated by using X-Ray Diffractom...
Article
Titanium dioxide nanorods were prepared by hydrothermal method using titanium tetrachloride TiCl4 as a precursor solution and an expanded gate field effect transistor's (EGFET) sensing membrane has been used for pH sensing applications. The TiO2 nanorods were grown onto fluorine-doped tin oxide FTO coated glass substrates at a hydrothermal reaction...
Article
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In this study, the hydrothermal method is used for growing and characterization of titanium dioxide (TiO2) nanorods on the fluorine-doped tin oxide (FTO) substrate at different hydrothermal reaction temperatures and constant reaction time. The objective of the study is to investigate the effect of hydrothermal growth temperatures and annealing temp...
Article
This study developed a humidity sensor by synthesizing ZrO2 films on porous silicon (PSi) via spray pyrolysis at two substrate temperatures (300 °C and 400 °C). This is crucial as the performance of humidity sensors is strongly dependent on the microstructure and morphology of the sensing film. XRD and FESEM analysis confirmed the cubic crystal nan...
Article
Full-text available
Porous silicon (PSi) samples were prepared via electroless stain etching of silicon substrates in HF using V2O5 as an oxidant and ethanol as a surfactant for different etching times. The effects of etching time, the use of ethanol in the etchant as a surfactant, and routine change of the etching solution during the chemical stain etching were studi...
Article
Sn-doped 3D (micro/nano) V2O5 was synthesized on macro porous silicon (PSi) by solvothermal method for pH-EGFET sensor. Effect of Sn-dopant concentration and thermal annealing on the structure, morphology, optical, and electrical properties of the synthesized samples was analyzed. XRD analysis using Rietveld refinements confirmed decreasing in the...
Article
Full-text available
Lead Sulphide (PbS) thin films have been fabricated by spray pyrolysis technique on glass substrates using lead acetate and thiourea as Pb and S source respectively. The effect of substrate temperature in the range (150-350) °C on structural and optical properties of PbS thin films is reported. XRD studies show that the peaks of the grown films ref...
Article
Full-text available
Pure and Indium doped in Cadmium Zinc Sulfide Cd 0.6 Zn 0.4 S thin films were deposited onto glass substrate at different substrate temperature (275-375)C 0 , at different Indium doping concentration (1-10) ml by spray pyrolysis technique , using precursor solution of Cadmium The effect of Indium doping on the structure and morophology of prepared...
Article
Full-text available
Macro porous silicon (PSi) with porosity of 36.3%, depth of 12 μm, and average pore diameter of 1.38 μm was fabricated by electrochemically etching a p-type single crystal silicon wafer. Two different morphologies of vanadium pentoxide (V2O5), V2O5 nanorods and 3D (micro/nano) V2O5 spheres, were grown on the surface and wall of the prepared macro P...
Article
Porous silicon quantum dot (PSi-QD)was prepared from p-type silicon (100)using the electrochemical etching technique. The prepared PSi-QD was then applied as an extended gate field effect transistor (EGFET)in the synthesis of a PSi-QD based pH sensor. The morphology, structural properties, and pores of the prepared PSi-QD layer were characterized u...
Article
Generally, semiconductors such as SnO2, ZnO, and Fe2O3 are mostly used for gas detection. However, low sensitivity and high operating temperature limit their optoelectronic application, hence the need for viable alternative semiconductors. Vanadium pentoxide (V2O5) was selected for this study because of its layered structure and different valence s...
Article
The present study focuses on the influence of gamma irradiation induced through the morphology effects on the modification of the optical and the electrical properties of transparent indium tin oxide (ITO) thin films. The prepared samples were exposed to low gamma radiation at room temperature with doses 3.90 Gy, 7.81Gy, 11.7 Gy, and 15.62 Gy from...
Article
Full-text available
Nickel oxide (NiO) thin films have been prepared by spray pyrolysis on quartz substrate and p-type silicon wafer, used to fabricate single layer device (Au/NiO/Au) and heterojunction device (Au/NiO/Si/Au) as a gas sensors. The structural, morphological, and optical properties of these films were investigated. The prepared films had mesoporous NiO p...
Article
Full-text available
The fabrication of cobalt oxide (Co3O4) thin films has received considerable attention. The crystalline quality of Co3O4 plays an important role in the properties of the fabricated film. This paper reports on the performance of a local electrostatic spray pyrolysis system to prepare Co3O4 thin films on glass substrates. The effect of applying an el...
Article
Full-text available
In this paper, we have examined different metals (Au, Al, In) Ohmic contacts on spray deposited ZnS thin films. The thermal stability of the contact structures was also examined by annealing process. Specific contact resistance was determined by characterizing the current-voltage relation from transmission line method (TLM) measurement. The electri...
Article
Full-text available
Generally, semiconductors such as SnO2, ZnO, and Fe2O3 are mostly used for gas detection. However, low sensitivity and high operating temperature limittheir optoelectronic application, hence the need for viable alternative semiconductors. Vanadium pentoxide (V2O5) was selected for this study because of its layered structure and different valence st...
Article
Quaternary Cu 2 ZnSnS 4 (CZTS) thin films have been deposited by spray pyrolysis technique on glass substrates. The effect of substrate temperature in the range (573-633 K) and the copper salt concentration in the starting solution in the range (0.009-0.05 M) on the formation of the prepared films are investigated. The structural and optical proper...
Article
Full-text available
Cadmium sulphide (CdS) thin films with different substrate temperatures were prepared on glass substrates by spray pyrolysis technique. XRD patterns indicated the presence of single- phase hexagonal CdS. UV-VIS spectra of the films in the spectral region from 300 nm to 900 nm were studied using the optical transmittance measurements which were take...
Book
Full-text available
Investigation of the physical properties on an n- type GaP single crystal semiconductor compound is given. The magneto-optical properties, magneto photoconductivity, Hall effect as well as Seebeck and Nernst effects are measured for the same sample. A constructed basic experimental set-up for conducting these measurements is shown. An optical cryos...
Article
Full-text available
The temperature dependence of magneto-optical and magneto-photoconductivity measurements were carried out in the range of (200-330) K. A home made optical cryostat was used for the measurements. The measured room temperature value of the energy gap was found to be 2.211 eV. The temperature coefficient of energy gap was found to be -5.48 x 10 -4 eV/...
Article
Full-text available
A suitable simple optical cryostat for optical, magneto-optical, electrical and thermo-electrical measurements was designed. It is suitable for use in a magnetic pool gap as narrow as less than 1 cm. Throughout a long period of time, the heat diffusion process of the cryostat can be easily operated at slow increase in sample temperature in a range...
Article
A Seebeck and a magneto‐Seebeck coefficients were measured for a single crystal of GaP and found to be in the range of 200 to 1800 μ V/K and 0.2×10−2 to 5×10−2cm2 /K s in the temperature range from 203 to 320K. A mobility as high as 1000cm2/V s was observed. The density of state effective mass was calculated in the same temperature range above. By...
Article
Full-text available
Time coincident voltage pulses in the two closely space (1.6m) plastic scintillators were recorded. Most of the recorded events are expeted to be due to electrons in cosmic ray showers whose core fall at some distance from the detectors. This result is confirmed from a measurement of the frequency distribution of the recorded density ratios of the...

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