Prof. Dr. Selma M. H. AL-Jawad (original) (raw)

Papers by Prof. Dr. Selma M. H. AL-Jawad

Engineering and Technology Journal

Engineering and Technology Journal

Journal of Physics: Conference Series, 2021

In this paper, copper sulfide nanoparticles were synthesized by two-phase colloidal method with d... more In this paper, copper sulfide nanoparticles were synthesized by two-phase colloidal method with different reaction temperatures (140, 160, 180 and 200°C). The structural, morphological and optical properties of prepared CuS were analyzed by the X-Ray Diffractometer (XRD), Field Emission Scanning Electron Microscope (FESEM) and UV-VIS Spectrophotometer. The XRD peaks refer to the covellite copper sulfide with hexagonal structure. FESEM showed the rod formation at lower temperatures (140 and 160°C), whereas higher temperatures (180 and 200°C) form nanocrystals within spheres structures. UV-VIS showed that CuS nanoparticles have two absorption peaks, one at UV-VIS region and the second at NIR region and its energy gap decrease with increasing of reaction temperature.

Modern Physics Letters B, 2021

In this study, iron oxide nanoparticles (NPs) had been prepared by co-precipitation method. In or... more In this study, iron oxide nanoparticles (NPs) had been prepared by co-precipitation method. In order to reduce their toxicity and increase stability, prepared iron oxide was coated with gum Arabic. Gum Arabic is preferred over synthetic materials due to their non-toxicity, low cost and availability. Characterization of coated and non-coated iron oxide NPs had been performed by spectrophotometer, Fourier transfer infra-red spectrophotometer (FTIR), Zeta potential, X-ray diffraction (XRD) and field emission scanning electron microscopic (FE-SEM). The fabricated nanoparticles appeared purity and crystalline nature by XRD, with diameter average of 27.01 nm and 55.12 nm for iron oxide NPs and iron oxide NPs coated with gum Arabic, respectively. On the other hand, four biological activities of coated and non-coated iron oxide had been investigated. High removal of methylene blue pollutant dye (46%) was observed with iron oxide NPs, while removal percentage was 22.6 performed by iron oxide...

Journal of Sol-Gel Science and Technology, 2020

Journal of Sol-Gel Science and Technology, 2021

In recent years, cobalt attracted large interest in biological application, due to its biocompati... more In recent years, cobalt attracted large interest in biological application, due to its biocompatibility and low toxicity. The synthesis of Co doped-ZnO/MWCNTs hybrid by a wet chemical process been reported. The results confirmed prevailing that it is the size of Zinc Oxide NPs by determines the concentration of precursor. The effect of changing the concentration of Co doping on the physical properties of the prepared samples was investigated. The X-ray diffraction showed the formation of hexagonal wurtzite structure of zinc oxide with disappearance the diffraction peaks from cobalt. The crystalline size average increased from 25.66 to 33.33 nm with increasing concentration of cobalt. FESEM images confirmed the success of the growth of spherical clusters over the surface of interlocking cylindrical tubes and their association with a crimped surface. This indicates a formation Co doped-ZnO\MWCNT hybrid. In contrast, the UV–Vis spectra revealed that all hybrid nanostructures have high absorbance as well as the band gap narrowing with increasing cobalt-doping concentration, the band gap values of Co doped-ZnO/MWCNTs hybrid with Co (2%, 4%, 6%, 8%) are 3.29, 3.04, 2.99, and 2.97 eV, respectively. Moreover, the antibacterial effect reveals that, the synthesized Co doped-ZnO/MWCNTs hybrid has high activity toward the Gram-positive and Gram-negative bacteria High inhibition efficiency shown about (17.8–22) mm for E. coli and (19.5–20.5) mm for S. aureus at high concentration of Co dopant. Prepared ZnO/MWCNTs as hybrid and Co doped-ZnO/MWCNTs hybrid by simple sol–gel method and study the effect of variation transition metals like Co on the hybrid (ZnO/MWCNTs) for the antibacterial activity of the against the E. coli and S. aureus bacteria. To our knowledge, there is no report of Co/ZnO–MWCNTs prepared by sol–gel. Diethyl glycol a solvent was used in synthesizes of Co-doped ZnO/MWCNTs hybrid as the stabilizing factor, whose trap particle growth and quell particle conglomerate and gathering. the incorporation of Co+2 in ZnO lattice leads to the shift in the optical absorption and band gap narrowing (BGN) of ZnO reduced with increasing cobalt-doping concentration. The antibacterial activity of Co doped-ZnO–MWCNTs hybrid showed that increasing the concentration of the Co-dopant result in increasing the reactive oxygen spaces (ROS) and affected on their antibacterial activities. Prepared ZnO/MWCNTs as hybrid and Co doped-ZnO/MWCNTs hybrid by simple sol–gel method and study the effect of variation transition metals like Co on the hybrid (ZnO/MWCNTs) for the antibacterial activity of the against the E. coli and S. aureus bacteria. To our knowledge, there is no report of Co/ZnO–MWCNTs prepared by sol–gel. Diethyl glycol a solvent was used in synthesizes of Co-doped ZnO/MWCNTs hybrid as the stabilizing factor, whose trap particle growth and quell particle conglomerate and gathering. the incorporation of Co+2 in ZnO lattice leads to the shift in the optical absorption and band gap narrowing (BGN) of ZnO reduced with increasing cobalt-doping concentration. The antibacterial activity of Co doped-ZnO–MWCNTs hybrid showed that increasing the concentration of the Co-dopant result in increasing the reactive oxygen spaces (ROS) and affected on their antibacterial activities.

The European Physical Journal Applied Physics, 2020

In this work, TiO2 nanostructure thin films were deposited by using anodization technique, while ... more In this work, TiO2 nanostructure thin films were deposited by using anodization technique, while CdS thin films were deposited on TiO2 films by two methods chemical bath deposition (CBD) and successive ionic layer adsorption and reaction (SILAR). The structure of TiO2/CdS films were investigated and analyzed by XRD, SEM, and AFM, but the optical properties were investigated by UV–visible spectroscopy, PL spectroscopy, and spectral response. XRD analysis of all deposited films has confirmed the formation of two phases one is tetragonal phase (anatase, and rutile) for TiO2, and second hexagonal phase which belong to CdS layer. SEM images of TiO2 nanotubes arrays (NTAs)/CdS showed the TiO2 NTs walls become decorated with aggregates of fine CdS nanoparticles that partly penetrate into the TiO2 NTAs pores. AFM measurements displayed increase in the surface roughness compared with TiO2 films. PL measurement results of TiO2/CdS core–shell show two peaks, one is located at UV-region pointed...

Surface Review and Letters, 2020

Pure and nickel doped copper sulfide (CuS) nanostructure were prepared by hydrothermal method for... more Pure and nickel doped copper sulfide (CuS) nanostructure were prepared by hydrothermal method for 5 h at [Formula: see text]C. Structural, morphological and optical properties of the CuS nanostructure were studied for different Ni-doping concentration of 1%, 2%, 3%, 4%, and 5 %. X-ray diffraction studies showed the polycrystalline nature with hexagonal phase structure of CuS and Ni: CuS nanostructure. FE-SEM image showed that nickel doping concentration affected the nanostructure morphology. The absorbance spectra were then recorded at wavelengths ranging from 350 nm to 1000 nm, where the CuS nanostructures have strong absorbance in the NIR. The optical band gap energy of the samples increased as nickel concentration increasing. In particular, their optical band gap energies were 3.25, 3.48, 3.49, 3.49, 3.45 and 3.44 eV for undoped and Ni-doped CuS nanostructure with concentrations (1%, 2%, 3%, 4% and 5%), respectively. The antibacterial activity of Copper sulfide nanostructure agai...

Photonics and Nanostructures - Fundamentals and Applications, 2018

Journal of Cluster Science, 2019

Surface Review and Letters, 2017

In this work, TiO2 nanotube thin films were prepared by using the anodization technique. Differen... more In this work, TiO2 nanotube thin films were prepared by using the anodization technique. Different electrolytes solutions were used to specify the optimum condition. Annealing in air at different temperatures of (400, 500, and 600)[Formula: see text]C at constant time of 1[Formula: see text]h was achieved for all films. The structure (XRD, SEM, EDX, and AFM), and optical (UV–Visible spectroscopy, PL spectroscopy, and Spectral Response) properties of nanotube TiO2 films were investigated and analyzed for different electrolyte solutions. XRD analysis of all deposited films has confirmed the formation of polycrystalline-tetragonal phase (anatase, and rutile) with increase in crystalline size and, annealing temperatures. SEM measurements of TiO2 films show nanotube shapes with outer diameter of (80–130) nm. EDX analysis confirmed the stoichiometry ratio between Ti and O to be 1:2 to produce TiO2 film. PL measurement results show two peaks: one located at UV-region pointing to energy ban...

Journal of Al-Nahrain University - Science, 2017

Surface Review and Letters, 2017

Nanocrystalline SnO2 and SnO2:Cu thin films derived from SnCl[Formula: see text]H2O precursors ha... more Nanocrystalline SnO2 and SnO2:Cu thin films derived from SnCl[Formula: see text]H2O precursors have been prepared on glass substrates using sol–gel dip-coating technique. The deposited film was [Formula: see text][Formula: see text]nm thick and the films were annealed in air at 500[Formula: see text]C for 1[Formula: see text]h. Structural, optical and sensing properties of the films were studied under different preparation conditions, such as Cu-doping concentration of 2%, 4% and 6[Formula: see text]wt.%. X-ray diffraction studies show the polycrystalline nature with tetragonal rutile structure of SnO2 and Cu:SnO2 thin films. The films have highly preferred orientation along (110). The crystallite size of the prepared samples reduced with increasing Cu-doping concentrations and the addition of Cu as dopants changed the structural properties of the thin films. Surface morphology was determined through scanning electron microscopy and atomic force microscopy. Results show that the par...

Sumer 3

Background: Chitosan is a promising polymeric that has received much attention recently. Chitosan... more Background: Chitosan is a promising polymeric that has received much attention recently. Chitosan nanoparticles have wide applications as a nanocarrier for different organic and inorganic substances. Materials and Methods: In the present study, copper (CuNPs), chitosan nanoparticles (CNPs) and Cu/CS nanocomposite (Cu/CNC) were prepared and characterized. All prepared nanoparticles were inspected by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), Field emission scanning electron microscope (FE-SEM ), Energy Dispersive Spectroscopy (EDS), UV/VIS spectroscopy, and zeta potential. Finally, the antimicrobial activity of CuNPs, CNPs and Cu/CNC was tested by disc diffusion assay at different concentrations (0.5-2 mg/ml) against Candida albicans, Klebsiella. pneumoniae , Pseudomonas aeruginosa , Proteus mirabilis , Cryptococcus sp. , Staphylococcus aureus, Escherichia coli, and Acinetobacter sp. Results: The results showed an absorbance peak at 550 nm due to the pre...

In this work, tin oxide thin films have been prepared by Spray pyrolysis technique, using tin chl... more In this work, tin oxide thin films have been prepared by Spray pyrolysis technique, using tin chloride over sodalime glass. Structural and optical properties were studied under different conditions like substrate temperatures of 300, 350 and 400°C, and annealing in air at temperature 300°C for 1 hr. The films were characterized by XRD, SEM, AFM, and UV-VIS analysis. The optical spectra of the films were measured in the wavelength range of 300-900 nm by UV-VIS Spectrometer device. The X-ray diffraction studies confirmed the films have the orthogonal structure at low substrate temperature change to a tetragonal structure at high substrate temperature. Films prepared with different substrate temperatures were correspond to preferential orientation along the plane (132) and (110) planes for structural orthogonal, tetragonal respectively. The grain size founded(25.2-9.77nm) for different substrate temperatures range (300-400°C) after annealing , from the (SEM) images the grain size values of the SnO 2 thin films are found to be in the range of (32.3-24.2 nm) corresponding to the substrate temperature (350 and 400°C) after annealing and from the AFM the root mean square (RMS) values for the thin film at substrate temperature 350C was found to be 10.4 nm, the surface roughness 8.86 nm. The maximum value of transmittance was found to be 78 % around the wavelength of 900nm at substrate temperatures 300°C also have energy gap (2.9-3.4eV) at substrate temperatures range (300-400°C) after annealing in air at temperature 300°C for 1 hr.

A ZnS nanoparticle was prepared using hydrothermal interaction of zinc acetate with Thiourea in d... more A ZnS nanoparticle was prepared using hydrothermal interaction of zinc acetate with Thiourea in different reaction temperatures (170 o C, 180 o C, 185 o C, 190 o C). The structural characterization of synthesized nanoparticle was determined by X-ray diffraction (XRD) which showed a hexagonal structural of ZnS. Scanning electron microscopy (SEM) and energy dispersive spectrum (EDS) analysis were confirmed that the morphology and elemental analysis was formed ZnS nanoparticle. Absorption study has been carried out using UV-VIS spectrophotometer to determine the band gap of ZnS nanoparticle. The optical energy band gap was changed at values equal to (4.16, 4.46, 4.1 and 4.35eV) with different hydrothermal temperatures at (170 o C, 180 o C, 185 o C and 190 o C) respectively. However, these values of energy gaps for ZnS nanoparticles are blue shift and larger than that bulk value due to quantum confinement. Fourier Transform Infrared Spectra (FTIR) is recorded in an FTIR spectrometer to ...

Engineering and Technology Journal

Engineering and Technology Journal

Journal of Physics: Conference Series, 2021

In this paper, copper sulfide nanoparticles were synthesized by two-phase colloidal method with d... more In this paper, copper sulfide nanoparticles were synthesized by two-phase colloidal method with different reaction temperatures (140, 160, 180 and 200°C). The structural, morphological and optical properties of prepared CuS were analyzed by the X-Ray Diffractometer (XRD), Field Emission Scanning Electron Microscope (FESEM) and UV-VIS Spectrophotometer. The XRD peaks refer to the covellite copper sulfide with hexagonal structure. FESEM showed the rod formation at lower temperatures (140 and 160°C), whereas higher temperatures (180 and 200°C) form nanocrystals within spheres structures. UV-VIS showed that CuS nanoparticles have two absorption peaks, one at UV-VIS region and the second at NIR region and its energy gap decrease with increasing of reaction temperature.

Modern Physics Letters B, 2021

In this study, iron oxide nanoparticles (NPs) had been prepared by co-precipitation method. In or... more In this study, iron oxide nanoparticles (NPs) had been prepared by co-precipitation method. In order to reduce their toxicity and increase stability, prepared iron oxide was coated with gum Arabic. Gum Arabic is preferred over synthetic materials due to their non-toxicity, low cost and availability. Characterization of coated and non-coated iron oxide NPs had been performed by spectrophotometer, Fourier transfer infra-red spectrophotometer (FTIR), Zeta potential, X-ray diffraction (XRD) and field emission scanning electron microscopic (FE-SEM). The fabricated nanoparticles appeared purity and crystalline nature by XRD, with diameter average of 27.01 nm and 55.12 nm for iron oxide NPs and iron oxide NPs coated with gum Arabic, respectively. On the other hand, four biological activities of coated and non-coated iron oxide had been investigated. High removal of methylene blue pollutant dye (46%) was observed with iron oxide NPs, while removal percentage was 22.6 performed by iron oxide...

Journal of Sol-Gel Science and Technology, 2020

Journal of Sol-Gel Science and Technology, 2021

In recent years, cobalt attracted large interest in biological application, due to its biocompati... more In recent years, cobalt attracted large interest in biological application, due to its biocompatibility and low toxicity. The synthesis of Co doped-ZnO/MWCNTs hybrid by a wet chemical process been reported. The results confirmed prevailing that it is the size of Zinc Oxide NPs by determines the concentration of precursor. The effect of changing the concentration of Co doping on the physical properties of the prepared samples was investigated. The X-ray diffraction showed the formation of hexagonal wurtzite structure of zinc oxide with disappearance the diffraction peaks from cobalt. The crystalline size average increased from 25.66 to 33.33 nm with increasing concentration of cobalt. FESEM images confirmed the success of the growth of spherical clusters over the surface of interlocking cylindrical tubes and their association with a crimped surface. This indicates a formation Co doped-ZnO\MWCNT hybrid. In contrast, the UV–Vis spectra revealed that all hybrid nanostructures have high absorbance as well as the band gap narrowing with increasing cobalt-doping concentration, the band gap values of Co doped-ZnO/MWCNTs hybrid with Co (2%, 4%, 6%, 8%) are 3.29, 3.04, 2.99, and 2.97 eV, respectively. Moreover, the antibacterial effect reveals that, the synthesized Co doped-ZnO/MWCNTs hybrid has high activity toward the Gram-positive and Gram-negative bacteria High inhibition efficiency shown about (17.8–22) mm for E. coli and (19.5–20.5) mm for S. aureus at high concentration of Co dopant. Prepared ZnO/MWCNTs as hybrid and Co doped-ZnO/MWCNTs hybrid by simple sol–gel method and study the effect of variation transition metals like Co on the hybrid (ZnO/MWCNTs) for the antibacterial activity of the against the E. coli and S. aureus bacteria. To our knowledge, there is no report of Co/ZnO–MWCNTs prepared by sol–gel. Diethyl glycol a solvent was used in synthesizes of Co-doped ZnO/MWCNTs hybrid as the stabilizing factor, whose trap particle growth and quell particle conglomerate and gathering. the incorporation of Co+2 in ZnO lattice leads to the shift in the optical absorption and band gap narrowing (BGN) of ZnO reduced with increasing cobalt-doping concentration. The antibacterial activity of Co doped-ZnO–MWCNTs hybrid showed that increasing the concentration of the Co-dopant result in increasing the reactive oxygen spaces (ROS) and affected on their antibacterial activities. Prepared ZnO/MWCNTs as hybrid and Co doped-ZnO/MWCNTs hybrid by simple sol–gel method and study the effect of variation transition metals like Co on the hybrid (ZnO/MWCNTs) for the antibacterial activity of the against the E. coli and S. aureus bacteria. To our knowledge, there is no report of Co/ZnO–MWCNTs prepared by sol–gel. Diethyl glycol a solvent was used in synthesizes of Co-doped ZnO/MWCNTs hybrid as the stabilizing factor, whose trap particle growth and quell particle conglomerate and gathering. the incorporation of Co+2 in ZnO lattice leads to the shift in the optical absorption and band gap narrowing (BGN) of ZnO reduced with increasing cobalt-doping concentration. The antibacterial activity of Co doped-ZnO–MWCNTs hybrid showed that increasing the concentration of the Co-dopant result in increasing the reactive oxygen spaces (ROS) and affected on their antibacterial activities.

The European Physical Journal Applied Physics, 2020

In this work, TiO2 nanostructure thin films were deposited by using anodization technique, while ... more In this work, TiO2 nanostructure thin films were deposited by using anodization technique, while CdS thin films were deposited on TiO2 films by two methods chemical bath deposition (CBD) and successive ionic layer adsorption and reaction (SILAR). The structure of TiO2/CdS films were investigated and analyzed by XRD, SEM, and AFM, but the optical properties were investigated by UV–visible spectroscopy, PL spectroscopy, and spectral response. XRD analysis of all deposited films has confirmed the formation of two phases one is tetragonal phase (anatase, and rutile) for TiO2, and second hexagonal phase which belong to CdS layer. SEM images of TiO2 nanotubes arrays (NTAs)/CdS showed the TiO2 NTs walls become decorated with aggregates of fine CdS nanoparticles that partly penetrate into the TiO2 NTAs pores. AFM measurements displayed increase in the surface roughness compared with TiO2 films. PL measurement results of TiO2/CdS core–shell show two peaks, one is located at UV-region pointed...

Surface Review and Letters, 2020

Pure and nickel doped copper sulfide (CuS) nanostructure were prepared by hydrothermal method for... more Pure and nickel doped copper sulfide (CuS) nanostructure were prepared by hydrothermal method for 5 h at [Formula: see text]C. Structural, morphological and optical properties of the CuS nanostructure were studied for different Ni-doping concentration of 1%, 2%, 3%, 4%, and 5 %. X-ray diffraction studies showed the polycrystalline nature with hexagonal phase structure of CuS and Ni: CuS nanostructure. FE-SEM image showed that nickel doping concentration affected the nanostructure morphology. The absorbance spectra were then recorded at wavelengths ranging from 350 nm to 1000 nm, where the CuS nanostructures have strong absorbance in the NIR. The optical band gap energy of the samples increased as nickel concentration increasing. In particular, their optical band gap energies were 3.25, 3.48, 3.49, 3.49, 3.45 and 3.44 eV for undoped and Ni-doped CuS nanostructure with concentrations (1%, 2%, 3%, 4% and 5%), respectively. The antibacterial activity of Copper sulfide nanostructure agai...

Photonics and Nanostructures - Fundamentals and Applications, 2018

Journal of Cluster Science, 2019

Surface Review and Letters, 2017

In this work, TiO2 nanotube thin films were prepared by using the anodization technique. Differen... more In this work, TiO2 nanotube thin films were prepared by using the anodization technique. Different electrolytes solutions were used to specify the optimum condition. Annealing in air at different temperatures of (400, 500, and 600)[Formula: see text]C at constant time of 1[Formula: see text]h was achieved for all films. The structure (XRD, SEM, EDX, and AFM), and optical (UV–Visible spectroscopy, PL spectroscopy, and Spectral Response) properties of nanotube TiO2 films were investigated and analyzed for different electrolyte solutions. XRD analysis of all deposited films has confirmed the formation of polycrystalline-tetragonal phase (anatase, and rutile) with increase in crystalline size and, annealing temperatures. SEM measurements of TiO2 films show nanotube shapes with outer diameter of (80–130) nm. EDX analysis confirmed the stoichiometry ratio between Ti and O to be 1:2 to produce TiO2 film. PL measurement results show two peaks: one located at UV-region pointing to energy ban...

Journal of Al-Nahrain University - Science, 2017

Surface Review and Letters, 2017

Nanocrystalline SnO2 and SnO2:Cu thin films derived from SnCl[Formula: see text]H2O precursors ha... more Nanocrystalline SnO2 and SnO2:Cu thin films derived from SnCl[Formula: see text]H2O precursors have been prepared on glass substrates using sol–gel dip-coating technique. The deposited film was [Formula: see text][Formula: see text]nm thick and the films were annealed in air at 500[Formula: see text]C for 1[Formula: see text]h. Structural, optical and sensing properties of the films were studied under different preparation conditions, such as Cu-doping concentration of 2%, 4% and 6[Formula: see text]wt.%. X-ray diffraction studies show the polycrystalline nature with tetragonal rutile structure of SnO2 and Cu:SnO2 thin films. The films have highly preferred orientation along (110). The crystallite size of the prepared samples reduced with increasing Cu-doping concentrations and the addition of Cu as dopants changed the structural properties of the thin films. Surface morphology was determined through scanning electron microscopy and atomic force microscopy. Results show that the par...

Sumer 3

Background: Chitosan is a promising polymeric that has received much attention recently. Chitosan... more Background: Chitosan is a promising polymeric that has received much attention recently. Chitosan nanoparticles have wide applications as a nanocarrier for different organic and inorganic substances. Materials and Methods: In the present study, copper (CuNPs), chitosan nanoparticles (CNPs) and Cu/CS nanocomposite (Cu/CNC) were prepared and characterized. All prepared nanoparticles were inspected by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), Field emission scanning electron microscope (FE-SEM ), Energy Dispersive Spectroscopy (EDS), UV/VIS spectroscopy, and zeta potential. Finally, the antimicrobial activity of CuNPs, CNPs and Cu/CNC was tested by disc diffusion assay at different concentrations (0.5-2 mg/ml) against Candida albicans, Klebsiella. pneumoniae , Pseudomonas aeruginosa , Proteus mirabilis , Cryptococcus sp. , Staphylococcus aureus, Escherichia coli, and Acinetobacter sp. Results: The results showed an absorbance peak at 550 nm due to the pre...

In this work, tin oxide thin films have been prepared by Spray pyrolysis technique, using tin chl... more In this work, tin oxide thin films have been prepared by Spray pyrolysis technique, using tin chloride over sodalime glass. Structural and optical properties were studied under different conditions like substrate temperatures of 300, 350 and 400°C, and annealing in air at temperature 300°C for 1 hr. The films were characterized by XRD, SEM, AFM, and UV-VIS analysis. The optical spectra of the films were measured in the wavelength range of 300-900 nm by UV-VIS Spectrometer device. The X-ray diffraction studies confirmed the films have the orthogonal structure at low substrate temperature change to a tetragonal structure at high substrate temperature. Films prepared with different substrate temperatures were correspond to preferential orientation along the plane (132) and (110) planes for structural orthogonal, tetragonal respectively. The grain size founded(25.2-9.77nm) for different substrate temperatures range (300-400°C) after annealing , from the (SEM) images the grain size values of the SnO 2 thin films are found to be in the range of (32.3-24.2 nm) corresponding to the substrate temperature (350 and 400°C) after annealing and from the AFM the root mean square (RMS) values for the thin film at substrate temperature 350C was found to be 10.4 nm, the surface roughness 8.86 nm. The maximum value of transmittance was found to be 78 % around the wavelength of 900nm at substrate temperatures 300°C also have energy gap (2.9-3.4eV) at substrate temperatures range (300-400°C) after annealing in air at temperature 300°C for 1 hr.

A ZnS nanoparticle was prepared using hydrothermal interaction of zinc acetate with Thiourea in d... more A ZnS nanoparticle was prepared using hydrothermal interaction of zinc acetate with Thiourea in different reaction temperatures (170 o C, 180 o C, 185 o C, 190 o C). The structural characterization of synthesized nanoparticle was determined by X-ray diffraction (XRD) which showed a hexagonal structural of ZnS. Scanning electron microscopy (SEM) and energy dispersive spectrum (EDS) analysis were confirmed that the morphology and elemental analysis was formed ZnS nanoparticle. Absorption study has been carried out using UV-VIS spectrophotometer to determine the band gap of ZnS nanoparticle. The optical energy band gap was changed at values equal to (4.16, 4.46, 4.1 and 4.35eV) with different hydrothermal temperatures at (170 o C, 180 o C, 185 o C and 190 o C) respectively. However, these values of energy gaps for ZnS nanoparticles are blue shift and larger than that bulk value due to quantum confinement. Fourier Transform Infrared Spectra (FTIR) is recorded in an FTIR spectrometer to ...