zuheer N. Majeed | University Of Tikrit (original) (raw)

Papers by zuheer N. Majeed

Fìzika ì hìmìâ tverdogo tìla, Feb 29, 2024

AIP conference proceedings, 2024

AIP Conference Proceedings, Dec 31, 2022

AIP Conference Proceedings, Dec 31, 2022

Mağallaẗ Tikrīt li-l-ʻulūm al-ṣirfaẗ, Dec 24, 2023

Thin films of titanium dioxide (TiO2) with several copper ratios were deposited on glass substrat... more Thin films of titanium dioxide (TiO2) with several copper ratios were deposited on glass substrates using pulsed laser deposition (PLD) for pure and doped samples (TiO2 Pure, 1 % Cu, 2 % Cu, and 3 % Cu), energy (600 mJ), and frequency (6 Hz). X-ray diffraction (XRD) showed that the width of the peaks decreases with increasing the ratio of doping with copper. This leads to an increase in the crystal size and in the intensity of the copper peaks, as well as a gradual decrease in the intensity of the titanium dioxide peaks. The results of the atomic force microscope showed that increasing the inoculation percentage leads to an increase in the surface roughness and the average grain diameter, and thus an increase in the growth of the particle size. The electrical tests (Hall effect) showed that the prepared films are of (n-type) and that the concentration of carriers (n) increased with the doping ratio, while the mobility values (µH) decreased directly with the increase in copper. The electrical conductivity (DC) test showed an increase in the activation energy as a result of the increase in the copper inoculation percentage and thus the electrical conductivity increases.

Tikrit Journal of Pure Science, 2011

MINAR International journal of applied sciences and technology, Sep 1, 2020

In this study, composites of carbon nanotubes and zinc matrix have been fabricated by a powder me... more In this study, composites of carbon nanotubes and zinc matrix have been fabricated by a powder metallurgy method. Firstly, CNT and Zn powders with sizes in the range of (4.5-6.7) nm, respectivel are dispersed at various weight contents (in the range of (2.0%-.1.0 %) in polyester polymer as solvent to get (polyester /CNT-Zn) Nano composite of about 2 mm thickness. The effects of different multi-walled carbon nanotubes (CNTs) contents on the ac conductivity and dielectric properties of the composites were investigated. Ac conductivity measurements of multi-walled carbon nanotubes (CNTs) reinforced polyester have been evaluated. AC conductivity was examined in the frequency range from (100-400k) Hz at ambient temperature.An enhancement of Ac-conductivity, in accordance to percolation theory, was evidenced increasing the weight content of the conductive Nano-filler .The experimental results indicate that the frequency dependent behavior of CNT-Zn /polyester Nano composite can be modeled by R-C circuit, permittivity of material increase with increasing of CNT content. .Also, the results showed that the addition to the zinc matrix of 1% by volume of carbon nanotubes caused increases in the ac conductivity .

MINAR International journal of applied sciences and technology, Jun 1, 2020

In this paper,ZnO was mixing by various concentrations of SiO2 (5,10,15) w%. The mixture was depo... more In this paper,ZnO was mixing by various concentrations of SiO2 (5,10,15) w%. The mixture was deposited on glass substrate by Pulsed Laser Deposition (PLD) technique under high vacuum (10-2 Torr) using constant prepared conditions such as: Nd:YAG wavelength 1064nm, Laser Pulse energy (100-1000) mJ, Pulse duration=10ns and Repetition frequency 6 Hz.The thickness of the prepared films was about (250) nm. The structure of the thin films was examined by using (XRD) analysis.The results showed that there was a decrease in the peaks of zinc oxide with gradual peaks of the zinc silicate x T include the spectral absorption and transmission recording were studied at the wavelength range (200-1100) nm. Some of the optical constants, including absorption coefficient, and energy gap are calculated.The results show that an increases in the absorption coefficient after and decreses in the energy gap after the doping with SiO2 particles. In this paper we studied the effect of SiO2 ratio on the sensitivity of (NO2) gas sensor. It is found that the increase in the sensitivity after doping process with SiO2 particles.

Maǧallaẗ ǧāmiʻaẗ kirkūk, Dec 1, 2018

In this paper ,ZnO was mixed by various concentrations (5,10,15,20,25) w% SiO 2 .The mixture was ... more In this paper ,ZnO was mixed by various concentrations (5,10,15,20,25) w% SiO 2 .The mixture was deposited on glass substrate by laser pulse deposition at room temperature. X-ray results showed that there was a decrease in the peaks of zinc oxide with gradual peaks of the zinc silicate compound at angles 2Ө 2) due to the increase in silicon oxide concentrations rates. The infrared spectrometer Fourier transform was used to study all prepared films and gave good results about the chemical bonds of the composite and their locations and correspond to the standard results of the zinc silicate compound. The results of the Atomic Force Microscope showed that all of prepared films were having Nano scale size and there was an increase in square root roughness index.

Mağallaẗ Tikrīt li-l-ʻulūm al-ṣirfaẗ, Feb 10, 2023

In this research the effect of annealing and Argon Laser Irradiation on some optical properties o... more In this research the effect of annealing and Argon Laser Irradiation on some optical properties of CuO thin films have been done. Thin films were prepared by chemical spray pyrolysis technique. The thickness of films was 1000 A°. Optical properties such as Reflectance, Energy band gap and Absorption coefficient as a function of photon energy have been studied within the wavelength range of (300-900) nm, using UV-visible Spectrophotometer, before and after annealing and irradiation. It is found that the optical properties are changed.

Mağallaẗ Tikrīt li-l-ʻulūm al-ṣirfaẗ, Feb 8, 2023

In this research we study the effect of Argon Laser Irradiation and annealing on the some optical... more In this research we study the effect of Argon Laser Irradiation and annealing on the some optical properties of SnO 2 Thin film. These films were prepared by chemical spray pyrolysis method. The film thickness was 1500 A°. optical properties such as (Reflection, Energy band gab, Absorption coefficient, Refractive index, and extinction coefficient) as a function of photon energy have been studied within the wavelength range (300-900) nm, using (u v-visible) Spectrophotometer, before and after irradiation and annealing. it is found that the optical properties were change .

Materials Science Forum, 2021

Powder technology has a great impact on the industry and the need for the labor market since this... more Powder technology has a great impact on the industry and the need for the labor market since this technology has been used to manufacture copper-based composition models with a fixed rate of 5% of (SiC) with nanostructuring of (0,5,10,15,20) %. Regarding nanoscale zirconia (ZrO2), the mineral and ceramic powders were grinded with a grinding time of two hours for the purpose of homogeneity, then the powders were pressed at a pressure of 5 tons and a time of one minute only. Later, the properties were studied and the prepared samples were sintered at 900 °C for two hours.. The physical properties were represented by density and porosity, mechanical properties by compressive strength (samples failed) and wear and structural properties by SEM and EDS. The results showed that the true density and real porosity decreased with the increase in the size of the support ratios, while we noticed an increase in compressive strength with the increase of the added nanoscale ratios. As for the wear...

Copper Iodide (CuI) nanoparticles with (250 nm) thickness have been prepared at RT on glass subst... more Copper Iodide (CuI) nanoparticles with (250 nm) thickness have been prepared at RT on glass substrate using PLD technique with focused Nd:YAG laser beam at (800 mJ) with a frequency second radiation at (1064 nm) (pulse width 9 ns) repetition frequency (6 Hz), for 500 laser pulses incident on the target surface . The films annealed to different annealing temperatures (423K )and(523K). The structural and surface morphology properties of the deposited CuI thin films were examined by X-ray diffraction analysis (XRD) and Atomic force microscope (AFM). The X-ray diffraction show that structure is a cubic phase with (111) plane preferential orientation direction. AFM was used to examine and measure the morphology and average diameter for CuI thin films respectively. It is observed that the average nanoparticles size increases with increasing of annealing temperature. The optical measurements showed that CuI thin films have direct allowed energy gap transition and the energy gap (Eg) decrea...

Tikrit Journal of Pure Science, 2019

In this paper,Zinc oxide was dopped by various concentrations (5,10,15,20,25) % wt, silicon oxide... more In this paper,Zinc oxide was dopped by various concentrations (5,10,15,20,25) % wt, silicon oxide The mixture was deposited on glass substrate by laser pulse deposition at room temperature to obtain (Zn2SiO4) thin films .The optical properties of thin films prepared on spectral absorption and transmission recording were studied at the wavelength range (200- 1100) nm. Some of the optical constants, including absorptance, transmission, absorption coefficient, and energy gap are calculated before and after annealing at (400 ̊C) for (1 hr). Absorptance values and absorption coefficient increase after doping and transmission and energy gap decreases after the doping. Absorbance values and absorption coefficient decreases after annealing and transmission and energy gap increase after the annealing . http://dx.doi.org/10.25130/tjps.24.2019.015

Tikrit Journal of Pure Science, 2019

In this paper zinc oxide was dopped by various concentrations (5,10,15,20,25) % of silicon dioxid... more In this paper zinc oxide was dopped by various concentrations (5,10,15,20,25) % of silicon dioxide. The mixture was deposited on glass substrate by laser pulse deposition at room temperature to obtain (Zn2SiO4) thin films. The D.C conductivity showed a decrease in activation energy by increasing doping from (Ea1=0.096 eV) to (Ea1=0.075 eV) before annealing and after annealing from (Ea1=0.048 eV) to(Ea1=0.027 eV). Hall effect showed that the concentration of carriers increases from (2.79 ×1018cm-3) to (14.29× 1018cm-3 ) before annealing and from (0.30×1016cm-3) to (26.25×1016cm-3) after annealing. The mobility decreases from(2.3cm2/v. sec) to (0.99cm2/v. sec) before annealing and from (7cm2/v. sec) to (2.5cm2/v . sec). http://dx.doi.org/10.25130/tjps.23.2018.173

journal of the college of basic education

The current research deals with the powder method to study a system with a mineral base of copper... more The current research deals with the powder method to study a system with a mineral base of copper and the first support material of silicon carbide at a constant rate of 5% while the second support material was a variable from Nano crystalline and with a cementation ratio of (0,5,10,15,20) %. The powders were mixed by the volumetric method. Due to the difference in densities between the three powders, the grinding process was carried out for a two-hour period with a mill of local manufacture and with steel balls. Then, the mixed powders were pressed with a Turkish hydraulic press at a pressure of (5 tons) and for one minute. The prepared samples were thermally sintered in an English furnace at 900 °C for only two hours. Moreover, various tests were performed on the models including (hardness, density, porosity, X-ray diffraction) before and after sintering. The results showed that the best mixing ratio was 15% zirconia, which included micro-hardness (90.81 Hv) and less porosity (14....

Tikrit Journal of Pure Science

In this research, the pulse laser deposition method was used by the PLD Nd:YAG wavelength laser n... more In this research, the pulse laser deposition method was used by the PLD Nd:YAG wavelength laser nm1064λ = to precipitate thin films of pure zinc oxide and tin-like oxide with different weight ratios (0.2 , 0.4)kg were deposited on glass bases in order to study the effect of annealing at a degree 573k and deformation of some physical properties of zinc nanoparticle oxide films. X-ray diffraction measurements of pure and tainted oxide films of different proportions (0.2, 0.4)kg in tin indicated that these films possess a multi-crystal line structure, of hexagonal type. The topographical properties of the prepared membrane surfaces were studied using the Atomic Force Microscope (AFM) and showed that the ZnO membrane has a smooth and uniform surface in composition. The results of the optical properties also showed a sharp increase in the optical transmittance spectrum until it reaches 90% after annealing, and the deformation reduces the optical transmittance. It also found that the op...

Neuroquantology, May 18, 2022

Neuroquantology, May 2, 2022

Journal of Physics: Conference Series

Fìzika ì hìmìâ tverdogo tìla, Feb 29, 2024

AIP conference proceedings, 2024

AIP Conference Proceedings, Dec 31, 2022

AIP Conference Proceedings, Dec 31, 2022

Mağallaẗ Tikrīt li-l-ʻulūm al-ṣirfaẗ, Dec 24, 2023

Thin films of titanium dioxide (TiO2) with several copper ratios were deposited on glass substrat... more Thin films of titanium dioxide (TiO2) with several copper ratios were deposited on glass substrates using pulsed laser deposition (PLD) for pure and doped samples (TiO2 Pure, 1 % Cu, 2 % Cu, and 3 % Cu), energy (600 mJ), and frequency (6 Hz). X-ray diffraction (XRD) showed that the width of the peaks decreases with increasing the ratio of doping with copper. This leads to an increase in the crystal size and in the intensity of the copper peaks, as well as a gradual decrease in the intensity of the titanium dioxide peaks. The results of the atomic force microscope showed that increasing the inoculation percentage leads to an increase in the surface roughness and the average grain diameter, and thus an increase in the growth of the particle size. The electrical tests (Hall effect) showed that the prepared films are of (n-type) and that the concentration of carriers (n) increased with the doping ratio, while the mobility values (µH) decreased directly with the increase in copper. The electrical conductivity (DC) test showed an increase in the activation energy as a result of the increase in the copper inoculation percentage and thus the electrical conductivity increases.

Tikrit Journal of Pure Science, 2011

MINAR International journal of applied sciences and technology, Sep 1, 2020

In this study, composites of carbon nanotubes and zinc matrix have been fabricated by a powder me... more In this study, composites of carbon nanotubes and zinc matrix have been fabricated by a powder metallurgy method. Firstly, CNT and Zn powders with sizes in the range of (4.5-6.7) nm, respectivel are dispersed at various weight contents (in the range of (2.0%-.1.0 %) in polyester polymer as solvent to get (polyester /CNT-Zn) Nano composite of about 2 mm thickness. The effects of different multi-walled carbon nanotubes (CNTs) contents on the ac conductivity and dielectric properties of the composites were investigated. Ac conductivity measurements of multi-walled carbon nanotubes (CNTs) reinforced polyester have been evaluated. AC conductivity was examined in the frequency range from (100-400k) Hz at ambient temperature.An enhancement of Ac-conductivity, in accordance to percolation theory, was evidenced increasing the weight content of the conductive Nano-filler .The experimental results indicate that the frequency dependent behavior of CNT-Zn /polyester Nano composite can be modeled by R-C circuit, permittivity of material increase with increasing of CNT content. .Also, the results showed that the addition to the zinc matrix of 1% by volume of carbon nanotubes caused increases in the ac conductivity .

MINAR International journal of applied sciences and technology, Jun 1, 2020

In this paper,ZnO was mixing by various concentrations of SiO2 (5,10,15) w%. The mixture was depo... more In this paper,ZnO was mixing by various concentrations of SiO2 (5,10,15) w%. The mixture was deposited on glass substrate by Pulsed Laser Deposition (PLD) technique under high vacuum (10-2 Torr) using constant prepared conditions such as: Nd:YAG wavelength 1064nm, Laser Pulse energy (100-1000) mJ, Pulse duration=10ns and Repetition frequency 6 Hz.The thickness of the prepared films was about (250) nm. The structure of the thin films was examined by using (XRD) analysis.The results showed that there was a decrease in the peaks of zinc oxide with gradual peaks of the zinc silicate x T include the spectral absorption and transmission recording were studied at the wavelength range (200-1100) nm. Some of the optical constants, including absorption coefficient, and energy gap are calculated.The results show that an increases in the absorption coefficient after and decreses in the energy gap after the doping with SiO2 particles. In this paper we studied the effect of SiO2 ratio on the sensitivity of (NO2) gas sensor. It is found that the increase in the sensitivity after doping process with SiO2 particles.

Maǧallaẗ ǧāmiʻaẗ kirkūk, Dec 1, 2018

In this paper ,ZnO was mixed by various concentrations (5,10,15,20,25) w% SiO 2 .The mixture was ... more In this paper ,ZnO was mixed by various concentrations (5,10,15,20,25) w% SiO 2 .The mixture was deposited on glass substrate by laser pulse deposition at room temperature. X-ray results showed that there was a decrease in the peaks of zinc oxide with gradual peaks of the zinc silicate compound at angles 2Ө 2) due to the increase in silicon oxide concentrations rates. The infrared spectrometer Fourier transform was used to study all prepared films and gave good results about the chemical bonds of the composite and their locations and correspond to the standard results of the zinc silicate compound. The results of the Atomic Force Microscope showed that all of prepared films were having Nano scale size and there was an increase in square root roughness index.

Mağallaẗ Tikrīt li-l-ʻulūm al-ṣirfaẗ, Feb 10, 2023

In this research the effect of annealing and Argon Laser Irradiation on some optical properties o... more In this research the effect of annealing and Argon Laser Irradiation on some optical properties of CuO thin films have been done. Thin films were prepared by chemical spray pyrolysis technique. The thickness of films was 1000 A°. Optical properties such as Reflectance, Energy band gap and Absorption coefficient as a function of photon energy have been studied within the wavelength range of (300-900) nm, using UV-visible Spectrophotometer, before and after annealing and irradiation. It is found that the optical properties are changed.

Mağallaẗ Tikrīt li-l-ʻulūm al-ṣirfaẗ, Feb 8, 2023

In this research we study the effect of Argon Laser Irradiation and annealing on the some optical... more In this research we study the effect of Argon Laser Irradiation and annealing on the some optical properties of SnO 2 Thin film. These films were prepared by chemical spray pyrolysis method. The film thickness was 1500 A°. optical properties such as (Reflection, Energy band gab, Absorption coefficient, Refractive index, and extinction coefficient) as a function of photon energy have been studied within the wavelength range (300-900) nm, using (u v-visible) Spectrophotometer, before and after irradiation and annealing. it is found that the optical properties were change .

Materials Science Forum, 2021

Powder technology has a great impact on the industry and the need for the labor market since this... more Powder technology has a great impact on the industry and the need for the labor market since this technology has been used to manufacture copper-based composition models with a fixed rate of 5% of (SiC) with nanostructuring of (0,5,10,15,20) %. Regarding nanoscale zirconia (ZrO2), the mineral and ceramic powders were grinded with a grinding time of two hours for the purpose of homogeneity, then the powders were pressed at a pressure of 5 tons and a time of one minute only. Later, the properties were studied and the prepared samples were sintered at 900 °C for two hours.. The physical properties were represented by density and porosity, mechanical properties by compressive strength (samples failed) and wear and structural properties by SEM and EDS. The results showed that the true density and real porosity decreased with the increase in the size of the support ratios, while we noticed an increase in compressive strength with the increase of the added nanoscale ratios. As for the wear...

Copper Iodide (CuI) nanoparticles with (250 nm) thickness have been prepared at RT on glass subst... more Copper Iodide (CuI) nanoparticles with (250 nm) thickness have been prepared at RT on glass substrate using PLD technique with focused Nd:YAG laser beam at (800 mJ) with a frequency second radiation at (1064 nm) (pulse width 9 ns) repetition frequency (6 Hz), for 500 laser pulses incident on the target surface . The films annealed to different annealing temperatures (423K )and(523K). The structural and surface morphology properties of the deposited CuI thin films were examined by X-ray diffraction analysis (XRD) and Atomic force microscope (AFM). The X-ray diffraction show that structure is a cubic phase with (111) plane preferential orientation direction. AFM was used to examine and measure the morphology and average diameter for CuI thin films respectively. It is observed that the average nanoparticles size increases with increasing of annealing temperature. The optical measurements showed that CuI thin films have direct allowed energy gap transition and the energy gap (Eg) decrea...

Tikrit Journal of Pure Science, 2019

In this paper,Zinc oxide was dopped by various concentrations (5,10,15,20,25) % wt, silicon oxide... more In this paper,Zinc oxide was dopped by various concentrations (5,10,15,20,25) % wt, silicon oxide The mixture was deposited on glass substrate by laser pulse deposition at room temperature to obtain (Zn2SiO4) thin films .The optical properties of thin films prepared on spectral absorption and transmission recording were studied at the wavelength range (200- 1100) nm. Some of the optical constants, including absorptance, transmission, absorption coefficient, and energy gap are calculated before and after annealing at (400 ̊C) for (1 hr). Absorptance values and absorption coefficient increase after doping and transmission and energy gap decreases after the doping. Absorbance values and absorption coefficient decreases after annealing and transmission and energy gap increase after the annealing . http://dx.doi.org/10.25130/tjps.24.2019.015

Tikrit Journal of Pure Science, 2019

In this paper zinc oxide was dopped by various concentrations (5,10,15,20,25) % of silicon dioxid... more In this paper zinc oxide was dopped by various concentrations (5,10,15,20,25) % of silicon dioxide. The mixture was deposited on glass substrate by laser pulse deposition at room temperature to obtain (Zn2SiO4) thin films. The D.C conductivity showed a decrease in activation energy by increasing doping from (Ea1=0.096 eV) to (Ea1=0.075 eV) before annealing and after annealing from (Ea1=0.048 eV) to(Ea1=0.027 eV). Hall effect showed that the concentration of carriers increases from (2.79 ×1018cm-3) to (14.29× 1018cm-3 ) before annealing and from (0.30×1016cm-3) to (26.25×1016cm-3) after annealing. The mobility decreases from(2.3cm2/v. sec) to (0.99cm2/v. sec) before annealing and from (7cm2/v. sec) to (2.5cm2/v . sec). http://dx.doi.org/10.25130/tjps.23.2018.173

journal of the college of basic education

The current research deals with the powder method to study a system with a mineral base of copper... more The current research deals with the powder method to study a system with a mineral base of copper and the first support material of silicon carbide at a constant rate of 5% while the second support material was a variable from Nano crystalline and with a cementation ratio of (0,5,10,15,20) %. The powders were mixed by the volumetric method. Due to the difference in densities between the three powders, the grinding process was carried out for a two-hour period with a mill of local manufacture and with steel balls. Then, the mixed powders were pressed with a Turkish hydraulic press at a pressure of (5 tons) and for one minute. The prepared samples were thermally sintered in an English furnace at 900 °C for only two hours. Moreover, various tests were performed on the models including (hardness, density, porosity, X-ray diffraction) before and after sintering. The results showed that the best mixing ratio was 15% zirconia, which included micro-hardness (90.81 Hv) and less porosity (14....

Tikrit Journal of Pure Science

In this research, the pulse laser deposition method was used by the PLD Nd:YAG wavelength laser n... more In this research, the pulse laser deposition method was used by the PLD Nd:YAG wavelength laser nm1064λ = to precipitate thin films of pure zinc oxide and tin-like oxide with different weight ratios (0.2 , 0.4)kg were deposited on glass bases in order to study the effect of annealing at a degree 573k and deformation of some physical properties of zinc nanoparticle oxide films. X-ray diffraction measurements of pure and tainted oxide films of different proportions (0.2, 0.4)kg in tin indicated that these films possess a multi-crystal line structure, of hexagonal type. The topographical properties of the prepared membrane surfaces were studied using the Atomic Force Microscope (AFM) and showed that the ZnO membrane has a smooth and uniform surface in composition. The results of the optical properties also showed a sharp increase in the optical transmittance spectrum until it reaches 90% after annealing, and the deformation reduces the optical transmittance. It also found that the op...

Neuroquantology, May 18, 2022

Neuroquantology, May 2, 2022

Journal of Physics: Conference Series