Nadir F . Habubi - Academia.edu (original) (raw)
Papers by Nadir F . Habubi
IOP Conference Series: Earth and Environmental Science, 2021
Zirconium oxide (ZrO2) and Cu doped ZrO2 films were grown successfully by spray pyrolysis deposit... more Zirconium oxide (ZrO2) and Cu doped ZrO2 films were grown successfully by spray pyrolysis deposition (SPD). The structural, surface morphology and optical properties were analyzed. XRD patterns reveal films polycrystallinity and monoclinic phase intensity of ZrO2 with preferred orientation along M (111) plane increasing with increasing doping. The grain size was found to increase from 25 nm to 29.83 nm with increase in Cu doping. AFM images assure that films were nanostructure and the surface morphology and roughness depend on doping concentration. The optical bandgap energy decreases from 3.2 to 2.6 eV with increasing doping concentration.
Journal of the Arkansas Academy of Science, 2012
Characteristics and optical constants of pure and Ga-doped ZnO thin films have been studied. Pure... more Characteristics and optical constants of pure and Ga-doped ZnO thin films have been studied. Pure and Ga-doped zinc oxide thin films were deposited onto glass substrates using the spray pyrolysis technique. Optical absorption studies in the wavelength range of 300-900 nm showed a peak near 450 nm for different doped films (in addition to the peak for un-doped ZnO). Increasing the doping concentration of Ga to 7% induced an increase in the optical constants of films. This increase is attributed to the formation of chargetransfer complexes. ZnO thin films doped with Ga have improved the optical transmittance in the visible region. The addition of Ga also induced an obvious increase in the optical band gap of these films; the optical band gap of Ga-doped films was slightly higher than that of undoped samples (3.1 eV). This study also found that the highest band gap (E g =3.4 eV) occurred for the film deposited with a doping concentration of 5% gallium.
Journal of Physics: Conference Series, 2020
Zirconium oxide (ZrO2) and doped with boron (B) thin films were prepared by Chemical spray pyroly... more Zirconium oxide (ZrO2) and doped with boron (B) thin films were prepared by Chemical spray pyrolysis CSP. Optical band gap energy of the films decreased from 3.83 to 3.73.55 eV via increase of doping. X-XRD patterns disclosed that films structure were polycrystalline, mixture of monoclinic and tetragonal phases. Atomic force microscopy (AFM) results assure dependence of surface morphology and roughness upon doping.
Journal of Physics: Conference Series, 2020
One of the important materials for applications in many photoelectric filed [just like solar cell... more One of the important materials for applications in many photoelectric filed [just like solar cell, optoelectronic and other kinds on devices] is cadmium oxide thin films. There are several physical or chemical synthetic methods have been used to prepare transparent CdO films as described by many researchers. The X-ray diffraction study has confirmed the formation of CdO with nano-size scale. For this research CdO/FTO thin film has been prepared by electrolysis. The thin film is investigated by XRD, SEM and AFM surface morphology properties. XRD analysis showed that CdO films are a polycrystalline and exhibit cubic crystal structure with (111, 200, 311 and 222) orientation and the preferred orientation is 111. AFM and SEM were applied to study the morphology and estimate the surface roughness of the films obtained. (RMS) found that film roughness was 21.7 nm. The CdO film are n-type semiconductors and possess a direct optical band gap around 2.4 eV as shown in optical property studies.
In this paper, the nanocrystalline porous silicon (PSi) films are prepared by electrochemical etc... more In this paper, the nanocrystalline porous silicon (PSi) films are prepared by electrochemical etching of p-type silicon wafer with current density 7 mA/cm 2 and etching times on the formation nano-sized pore array with a dimension of around different etching time. The films were characterized by the measurement of XRD, FTIR spectroscopy and atomic force microscopy properties (AFM). We have estimated crystallites size from X-Ray diffraction about nanoscale for porous silicon and Atomic Force microscopy confirms the nanometric size Chemical fictionalization during the electrochemical etching show on the surface chemical composition of PS. The etching possesses inhomogeneous microstructures that contain a-Si clusters (Si3–Si–H) dispersed in amorphous silica matrix. From the FTIR analyses showed that the Si dangling bonds of the as-prepared PS layer have large amount of Hydrogen to form weak Si–H bonds. The atomic force microscopy investigation shows the rough silicon surface, with incr...
IOP Conference Series: Earth and Environmental Science, 2021
CdO and CdO: F films were grown using spray pyrolysis method (SPM). The effects of F doping on ph... more CdO and CdO: F films were grown using spray pyrolysis method (SPM). The effects of F doping on physical characterization were estimated using XRD, AFM and optical absorption. XRD patterns indicate that samples are cubic polycrystalline with preferred (111) orientation. AFM images assure that films consist of uniform spherical shaped grains, smooth morphology free of cracks. Optical bandgap was decreased as Fluorine doping increased
Applied Physics A, 2020
In this work, undoped and lanthanum doped cupric oxide (CuO:La) nanorods structured thin films we... more In this work, undoped and lanthanum doped cupric oxide (CuO:La) nanorods structured thin films were deposited at different concentrations (CLO) on p-type silicon substrates using the spray pyrolysis technique at 350 °C. XRD, AFM, SEM, and EDX techniques were used to investigate the structural, morphological, and compositional analysis, respectively. A decrease in crystallite size was observed from 13.4 to 7.75 nm and even the peak diffraction intensity decreased with an increase in La concentration. The hexagonal structure of the La 2 O 3 phase with poor orientation planes was observed at 7 wt% La. Amplitude parameters, grain size, and atoms distribution were discussed from AFM analysis. SEM images show a uniform distribution and homogeneous crystalline construction supported by quadrilateral pillars with nanorods-like in shape. The sensitivity, recovery, and response time for CLO thin films as room temperature NO 2 sensor devices were calculated. The effect of lanthanum concentration on the sensing mechanism of CuO thin films also has been reported.
Nano Biomedicine and Engineering, 2020
Tin oxide was prepared by chemical methods and then doped with different weight ratios of vanadiu... more Tin oxide was prepared by chemical methods and then doped with different weight ratios of vanadium 2wt% and 4wt%. The structural, morphological, and optical properties were studied. It was found that all the recorded films had a polycrystalline diffraction pattern and that the predominant reflection was (111) plane. The doping processes resulted in the improvement of crystalline structure and the disappearance of a number of secondary reflections and the direction of the film in a single crystalline pattern, thus reducing the values of energy gap and percentage transmittance. The morphological properties were studied by converting the three-dimensional images into graphic drawings to enable us to easily calculate surface parameters.
Journal of Physics: Conference Series, 2019
In this study, we compared the different Methods of determination of SMBH masses to study a corre... more In this study, we compared the different Methods of determination of SMBH masses to study a correlation between mass of supermassive black hole and spiral arm pitch angle for 41 images of spiral galaxies using Spitzer/IRAS 3.6-µm. We selected four methods to find a determination mass of SMBH. Velocity dispersions (σ) measurements and pitch angle of spiral arm took from the literature. In addition, SMBH masses estimates using a several methods (reverberation mapping RM, stellar dynamics SD, gas dynamics GD) from the literature from. In addition, the determinations of SMBH masses were found using the (MBH-σ) relation. Finally, we compared the (MBH-P) relation for these galaxies using each method with the Seigar’s equation, and found the results to agree for these methods.
In this investigation, FeS2 thin films were synthesized by spray pyrolysis technique on glass sub... more In this investigation, FeS2 thin films were synthesized by spray pyrolysis technique on glass substrates. The films were annealed at 400 ºC and 450ºC in air for a period of 1 hour. The optical characterizations of the as deposited and annealed films were carried out using UVVIS transmittance spectroscopy in the wavelength range 400900 nm. The results show that in the visible region the transmittance of the films decreases as the annealing temperature increases to 450ºC. The reverse is the case with the reflectance as it was observed to be increased in the same region. The result also shows that the absorption coefficient, extinction coefficient, real and imaginary parts of dielectric constant are tending to increase with the increasing of annealing temperature. Further analysis shows that the films have high optical conductivity about 4.06-6.20 x 1014S-1. The refractive index was found to be 4.38-5.14. The foregoing desirable propertiesmake the FeS2 to be a promising material for ...
Journal of Electron …, 2012
The influence of copper contents on the structural and optical properties of sprayed SnO2 thin fi... more The influence of copper contents on the structural and optical properties of sprayed SnO2 thin films has been investigated. The surface topography and structural properties of these films were studied by using atomic force microscopy (AFM) and X-ray ...
Applied Surface Science, 2008
ABSTRACT
Applied Surface Science, 2009
Thin films of InP were prepared onto glass and quartz substrates using laser ablation technique. ... more Thin films of InP were prepared onto glass and quartz substrates using laser ablation technique. Some of the prepared films were irradiated using a 60Co γ -ray source irradiation with a total dose of 100kGy at room temperature. The as deposited and irradiated films were identified by scanning electron microscopy, SEM and X-ray diffraction, XRD. The SEM images have shown
Diyala Journal For Pure Science, 2017
Poly (vinyl alcohol) doped with different Green methyl concentration (4%) by solvent cast method ... more Poly (vinyl alcohol) doped with different Green methyl concentration (4%) by solvent cast method for different thickness the prepare films were 5, 10, 15,and 20 µm. Transmission and absorption spectrum have been recored in order to study the effect of increasing thickness on some opttical constans such as transmittance, reflectance, absorption coefficient, refractive index and extinction coefficient. The film study reveals that all these parameters affect by increasing the thickness. The films show indirect allowed interband transitions that influenced by the thicknesses , the optical energy gap has been increased from about (3.36 eV) for the (5 µm) , (3.39 eV) for the (10 µm) , (3.41 eV) for the (15µm) and (3.45 eV) for the (20 µm) .
Journal of University of Anbar for Pure Science
Sb2S3 thin films have been prepared using chemical bath deposition .these films were annealed for... more Sb2S3 thin films have been prepared using chemical bath deposition .these films were annealed for different temperatures 373, 473 k. Absorbance and transmittance spectra were recorded in the wavelength range (300-900) nm. the nature of electronic transitions was determined, it was found that these films have direct allowed transition with an optical energy gap of 1.72, 1.76, 1.82 eV before and after annealing respectively. the extinction coefficient, refractive index, real and imaginary part of dielectric constant were also measured before and after annealing.
Journal of University of Anbar for Pure Science
Co 2 O 3 and Co 2 O 3(1-x) :Cu x films have been deposited by using spray pyrolysis technique on ... more Co 2 O 3 and Co 2 O 3(1-x) :Cu x films have been deposited by using spray pyrolysis technique on a glass substrates. The optical properties of the cobalt oxide have been studied as a function of doping concentration with Cu. Changes in direct optical band gap energy of cobalt oxide films were confirmed after doping, Eg increased from 1.48 and 1.95 eV for the undoped Co 2 O 3 to 1.55 and 2.05 eV with increasing the doping concentration to 5%. The effect of doping on the optical parameters of Co 2 O 3 thin films such as transmittance, reflectance, absorption coefficient, refractive index, extinction coefficient, and real and imaginary parts of dielectric constant has been reported.
Journal of Physics: Conference Series
The performance of first principles computations of nanostructured CdO and Cdo:Mg grown by spray ... more The performance of first principles computations of nanostructured CdO and Cdo:Mg grown by spray pyrolysis method (SPM) was studied, using density functional theory (DFT)). The structural and optical behaviour with XRD and ultraviolet visible spectroscopy. DFT displayed that Cd32O32 cluster and doped magnesium have cubic with rock salt structures. The optical bandgap of nanostructure films were obtained, while theoretically calculated for Mg-doped CdO cubic structures. The optical data displayed that the magnesium doped increase optical energy gap. Moreover, Optical results displayed that reflectivity of the nanostructure films varied from (400–900 nm) range with doping. While experimental transmittance was increased about 55% for 4% and decreased to 48% for 8% concentrations.
Journal of Materials Science: Materials in Electronics
The present article investigates the chemiresistive gas sensing characteristics of undoped and ni... more The present article investigates the chemiresistive gas sensing characteristics of undoped and nickel oxide-doped tin oxide gas sensors at different concentrations synthesized by a SILAR technique. The structural analysis revealed a tetragonal crystal structure with (110) dominant diffraction peaks and crystallite sizes ranging between 26 and 32 nm. When the NiO dopant concentration was increased to 7% by volume, AFM analysis revealed the development of island-like stairs on the surface of the SnO2 film, with the average grain size rising from 28.16 to 36.12 nm. FESEM micrographs revealed a porous surface with nano-spherical structures clustered together to form a sea stone-like structure with particle sizes ranging from 23.8 to 42.3 nm. When exposed to CO2, the developed sensor exhibits a rapid response time and strong stability properties. At an operating temperature of 323 K, the 5 percent nickel oxide-doped sample displayed the maximum sensor response (128%), with a response time of 13 s and a recovery time of 34 s. The designed sensor's dynamic response improved as the CO2 concentration increased. According to the sensing results, the 5% nickel oxide-doped film exhibits stability in the ambient atmosphere.
Mesopotamia Environmental Journal, 2018
... (12) Z. ALI, AKS AQILI, A. MAQSOOD, SMJ AKHTAR, Properties of Cu-Doped Low Resi-stive ZnSe Fi... more ... (12) Z. ALI, AKS AQILI, A. MAQSOOD, SMJ AKHTAR, Properties of Cu-Doped Low Resi-stive ZnSe Films Deposited by Two sourced Evaporation, Vacuum, 80, 302 (2005). (13) RB KALE, CD LOKHANDE, RS MANE, S.–H. HAN, Use of Modified Route for ZnSe Nanocrystalline ...
IOP Conference Series: Earth and Environmental Science, 2021
Zirconium oxide (ZrO2) and Cu doped ZrO2 films were grown successfully by spray pyrolysis deposit... more Zirconium oxide (ZrO2) and Cu doped ZrO2 films were grown successfully by spray pyrolysis deposition (SPD). The structural, surface morphology and optical properties were analyzed. XRD patterns reveal films polycrystallinity and monoclinic phase intensity of ZrO2 with preferred orientation along M (111) plane increasing with increasing doping. The grain size was found to increase from 25 nm to 29.83 nm with increase in Cu doping. AFM images assure that films were nanostructure and the surface morphology and roughness depend on doping concentration. The optical bandgap energy decreases from 3.2 to 2.6 eV with increasing doping concentration.
Journal of the Arkansas Academy of Science, 2012
Characteristics and optical constants of pure and Ga-doped ZnO thin films have been studied. Pure... more Characteristics and optical constants of pure and Ga-doped ZnO thin films have been studied. Pure and Ga-doped zinc oxide thin films were deposited onto glass substrates using the spray pyrolysis technique. Optical absorption studies in the wavelength range of 300-900 nm showed a peak near 450 nm for different doped films (in addition to the peak for un-doped ZnO). Increasing the doping concentration of Ga to 7% induced an increase in the optical constants of films. This increase is attributed to the formation of chargetransfer complexes. ZnO thin films doped with Ga have improved the optical transmittance in the visible region. The addition of Ga also induced an obvious increase in the optical band gap of these films; the optical band gap of Ga-doped films was slightly higher than that of undoped samples (3.1 eV). This study also found that the highest band gap (E g =3.4 eV) occurred for the film deposited with a doping concentration of 5% gallium.
Journal of Physics: Conference Series, 2020
Zirconium oxide (ZrO2) and doped with boron (B) thin films were prepared by Chemical spray pyroly... more Zirconium oxide (ZrO2) and doped with boron (B) thin films were prepared by Chemical spray pyrolysis CSP. Optical band gap energy of the films decreased from 3.83 to 3.73.55 eV via increase of doping. X-XRD patterns disclosed that films structure were polycrystalline, mixture of monoclinic and tetragonal phases. Atomic force microscopy (AFM) results assure dependence of surface morphology and roughness upon doping.
Journal of Physics: Conference Series, 2020
One of the important materials for applications in many photoelectric filed [just like solar cell... more One of the important materials for applications in many photoelectric filed [just like solar cell, optoelectronic and other kinds on devices] is cadmium oxide thin films. There are several physical or chemical synthetic methods have been used to prepare transparent CdO films as described by many researchers. The X-ray diffraction study has confirmed the formation of CdO with nano-size scale. For this research CdO/FTO thin film has been prepared by electrolysis. The thin film is investigated by XRD, SEM and AFM surface morphology properties. XRD analysis showed that CdO films are a polycrystalline and exhibit cubic crystal structure with (111, 200, 311 and 222) orientation and the preferred orientation is 111. AFM and SEM were applied to study the morphology and estimate the surface roughness of the films obtained. (RMS) found that film roughness was 21.7 nm. The CdO film are n-type semiconductors and possess a direct optical band gap around 2.4 eV as shown in optical property studies.
In this paper, the nanocrystalline porous silicon (PSi) films are prepared by electrochemical etc... more In this paper, the nanocrystalline porous silicon (PSi) films are prepared by electrochemical etching of p-type silicon wafer with current density 7 mA/cm 2 and etching times on the formation nano-sized pore array with a dimension of around different etching time. The films were characterized by the measurement of XRD, FTIR spectroscopy and atomic force microscopy properties (AFM). We have estimated crystallites size from X-Ray diffraction about nanoscale for porous silicon and Atomic Force microscopy confirms the nanometric size Chemical fictionalization during the electrochemical etching show on the surface chemical composition of PS. The etching possesses inhomogeneous microstructures that contain a-Si clusters (Si3–Si–H) dispersed in amorphous silica matrix. From the FTIR analyses showed that the Si dangling bonds of the as-prepared PS layer have large amount of Hydrogen to form weak Si–H bonds. The atomic force microscopy investigation shows the rough silicon surface, with incr...
IOP Conference Series: Earth and Environmental Science, 2021
CdO and CdO: F films were grown using spray pyrolysis method (SPM). The effects of F doping on ph... more CdO and CdO: F films were grown using spray pyrolysis method (SPM). The effects of F doping on physical characterization were estimated using XRD, AFM and optical absorption. XRD patterns indicate that samples are cubic polycrystalline with preferred (111) orientation. AFM images assure that films consist of uniform spherical shaped grains, smooth morphology free of cracks. Optical bandgap was decreased as Fluorine doping increased
Applied Physics A, 2020
In this work, undoped and lanthanum doped cupric oxide (CuO:La) nanorods structured thin films we... more In this work, undoped and lanthanum doped cupric oxide (CuO:La) nanorods structured thin films were deposited at different concentrations (CLO) on p-type silicon substrates using the spray pyrolysis technique at 350 °C. XRD, AFM, SEM, and EDX techniques were used to investigate the structural, morphological, and compositional analysis, respectively. A decrease in crystallite size was observed from 13.4 to 7.75 nm and even the peak diffraction intensity decreased with an increase in La concentration. The hexagonal structure of the La 2 O 3 phase with poor orientation planes was observed at 7 wt% La. Amplitude parameters, grain size, and atoms distribution were discussed from AFM analysis. SEM images show a uniform distribution and homogeneous crystalline construction supported by quadrilateral pillars with nanorods-like in shape. The sensitivity, recovery, and response time for CLO thin films as room temperature NO 2 sensor devices were calculated. The effect of lanthanum concentration on the sensing mechanism of CuO thin films also has been reported.
Nano Biomedicine and Engineering, 2020
Tin oxide was prepared by chemical methods and then doped with different weight ratios of vanadiu... more Tin oxide was prepared by chemical methods and then doped with different weight ratios of vanadium 2wt% and 4wt%. The structural, morphological, and optical properties were studied. It was found that all the recorded films had a polycrystalline diffraction pattern and that the predominant reflection was (111) plane. The doping processes resulted in the improvement of crystalline structure and the disappearance of a number of secondary reflections and the direction of the film in a single crystalline pattern, thus reducing the values of energy gap and percentage transmittance. The morphological properties were studied by converting the three-dimensional images into graphic drawings to enable us to easily calculate surface parameters.
Journal of Physics: Conference Series, 2019
In this study, we compared the different Methods of determination of SMBH masses to study a corre... more In this study, we compared the different Methods of determination of SMBH masses to study a correlation between mass of supermassive black hole and spiral arm pitch angle for 41 images of spiral galaxies using Spitzer/IRAS 3.6-µm. We selected four methods to find a determination mass of SMBH. Velocity dispersions (σ) measurements and pitch angle of spiral arm took from the literature. In addition, SMBH masses estimates using a several methods (reverberation mapping RM, stellar dynamics SD, gas dynamics GD) from the literature from. In addition, the determinations of SMBH masses were found using the (MBH-σ) relation. Finally, we compared the (MBH-P) relation for these galaxies using each method with the Seigar’s equation, and found the results to agree for these methods.
In this investigation, FeS2 thin films were synthesized by spray pyrolysis technique on glass sub... more In this investigation, FeS2 thin films were synthesized by spray pyrolysis technique on glass substrates. The films were annealed at 400 ºC and 450ºC in air for a period of 1 hour. The optical characterizations of the as deposited and annealed films were carried out using UVVIS transmittance spectroscopy in the wavelength range 400900 nm. The results show that in the visible region the transmittance of the films decreases as the annealing temperature increases to 450ºC. The reverse is the case with the reflectance as it was observed to be increased in the same region. The result also shows that the absorption coefficient, extinction coefficient, real and imaginary parts of dielectric constant are tending to increase with the increasing of annealing temperature. Further analysis shows that the films have high optical conductivity about 4.06-6.20 x 1014S-1. The refractive index was found to be 4.38-5.14. The foregoing desirable propertiesmake the FeS2 to be a promising material for ...
Journal of Electron …, 2012
The influence of copper contents on the structural and optical properties of sprayed SnO2 thin fi... more The influence of copper contents on the structural and optical properties of sprayed SnO2 thin films has been investigated. The surface topography and structural properties of these films were studied by using atomic force microscopy (AFM) and X-ray ...
Applied Surface Science, 2008
ABSTRACT
Applied Surface Science, 2009
Thin films of InP were prepared onto glass and quartz substrates using laser ablation technique. ... more Thin films of InP were prepared onto glass and quartz substrates using laser ablation technique. Some of the prepared films were irradiated using a 60Co γ -ray source irradiation with a total dose of 100kGy at room temperature. The as deposited and irradiated films were identified by scanning electron microscopy, SEM and X-ray diffraction, XRD. The SEM images have shown
Diyala Journal For Pure Science, 2017
Poly (vinyl alcohol) doped with different Green methyl concentration (4%) by solvent cast method ... more Poly (vinyl alcohol) doped with different Green methyl concentration (4%) by solvent cast method for different thickness the prepare films were 5, 10, 15,and 20 µm. Transmission and absorption spectrum have been recored in order to study the effect of increasing thickness on some opttical constans such as transmittance, reflectance, absorption coefficient, refractive index and extinction coefficient. The film study reveals that all these parameters affect by increasing the thickness. The films show indirect allowed interband transitions that influenced by the thicknesses , the optical energy gap has been increased from about (3.36 eV) for the (5 µm) , (3.39 eV) for the (10 µm) , (3.41 eV) for the (15µm) and (3.45 eV) for the (20 µm) .
Journal of University of Anbar for Pure Science
Sb2S3 thin films have been prepared using chemical bath deposition .these films were annealed for... more Sb2S3 thin films have been prepared using chemical bath deposition .these films were annealed for different temperatures 373, 473 k. Absorbance and transmittance spectra were recorded in the wavelength range (300-900) nm. the nature of electronic transitions was determined, it was found that these films have direct allowed transition with an optical energy gap of 1.72, 1.76, 1.82 eV before and after annealing respectively. the extinction coefficient, refractive index, real and imaginary part of dielectric constant were also measured before and after annealing.
Journal of University of Anbar for Pure Science
Co 2 O 3 and Co 2 O 3(1-x) :Cu x films have been deposited by using spray pyrolysis technique on ... more Co 2 O 3 and Co 2 O 3(1-x) :Cu x films have been deposited by using spray pyrolysis technique on a glass substrates. The optical properties of the cobalt oxide have been studied as a function of doping concentration with Cu. Changes in direct optical band gap energy of cobalt oxide films were confirmed after doping, Eg increased from 1.48 and 1.95 eV for the undoped Co 2 O 3 to 1.55 and 2.05 eV with increasing the doping concentration to 5%. The effect of doping on the optical parameters of Co 2 O 3 thin films such as transmittance, reflectance, absorption coefficient, refractive index, extinction coefficient, and real and imaginary parts of dielectric constant has been reported.
Journal of Physics: Conference Series
The performance of first principles computations of nanostructured CdO and Cdo:Mg grown by spray ... more The performance of first principles computations of nanostructured CdO and Cdo:Mg grown by spray pyrolysis method (SPM) was studied, using density functional theory (DFT)). The structural and optical behaviour with XRD and ultraviolet visible spectroscopy. DFT displayed that Cd32O32 cluster and doped magnesium have cubic with rock salt structures. The optical bandgap of nanostructure films were obtained, while theoretically calculated for Mg-doped CdO cubic structures. The optical data displayed that the magnesium doped increase optical energy gap. Moreover, Optical results displayed that reflectivity of the nanostructure films varied from (400–900 nm) range with doping. While experimental transmittance was increased about 55% for 4% and decreased to 48% for 8% concentrations.
Journal of Materials Science: Materials in Electronics
The present article investigates the chemiresistive gas sensing characteristics of undoped and ni... more The present article investigates the chemiresistive gas sensing characteristics of undoped and nickel oxide-doped tin oxide gas sensors at different concentrations synthesized by a SILAR technique. The structural analysis revealed a tetragonal crystal structure with (110) dominant diffraction peaks and crystallite sizes ranging between 26 and 32 nm. When the NiO dopant concentration was increased to 7% by volume, AFM analysis revealed the development of island-like stairs on the surface of the SnO2 film, with the average grain size rising from 28.16 to 36.12 nm. FESEM micrographs revealed a porous surface with nano-spherical structures clustered together to form a sea stone-like structure with particle sizes ranging from 23.8 to 42.3 nm. When exposed to CO2, the developed sensor exhibits a rapid response time and strong stability properties. At an operating temperature of 323 K, the 5 percent nickel oxide-doped sample displayed the maximum sensor response (128%), with a response time of 13 s and a recovery time of 34 s. The designed sensor's dynamic response improved as the CO2 concentration increased. According to the sensing results, the 5% nickel oxide-doped film exhibits stability in the ambient atmosphere.
Mesopotamia Environmental Journal, 2018
... (12) Z. ALI, AKS AQILI, A. MAQSOOD, SMJ AKHTAR, Properties of Cu-Doped Low Resi-stive ZnSe Fi... more ... (12) Z. ALI, AKS AQILI, A. MAQSOOD, SMJ AKHTAR, Properties of Cu-Doped Low Resi-stive ZnSe Films Deposited by Two sourced Evaporation, Vacuum, 80, 302 (2005). (13) RB KALE, CD LOKHANDE, RS MANE, S.–H. HAN, Use of Modified Route for ZnSe Nanocrystalline ...