Study of Properties of Cadmium Sulfide Prepared by Chemical Spray Pyrolysis Method

In this paper, we prepare thin films of CdS using the method of spray pyrolysis with thicknesses (150,200,250) nm. The optical, electrical and structural properties have been investigated for those films ready on glass substrates. Cadmium sulfide membrane has a polycrystalline structure of the hexagonal type. An increase in thickness did not affect the crystalline nature of the material as the material remained polycrystalline. Optical properties included the calculation of energy band gaps of the allowed direct electronic transitions. The energy band gap for CdS in the range (2.2-2.7)eV . The calculations also included some optical constants, such as transmittance also absorption coefficient. The increase in thickness led to an increase in the absorbance and absorption coefficient as well a decrease in the transmittance. The electrical properties include D. C. electric conductivity Hall effect. It was showing that the type of CdS films were (p-type)

Effect of Licorice Extract and Manganese Oxide Biosynthesis in the Treatment of Stomach Cancer

In this research, the preparation of licorice extract and the biosynthesis of manganese oxide in the treatment of stomach cancer were investigated by examining the cytotoxicity of the stomach cancer line. The structural properties of manganese oxide were also studied through X-ray examination, scanning electron microscope (SEM), and infrared spectroscopy, where it was found that manganese oxide is polycrystalline, and the average grain size is 62.571 nm, but by SEM, the grain size is 93.49–47.74 nm

The Effect of annealing temperature on the optical properties of (Cu2S)100-x( SnS2 )x thin films

Thin films of (Cu2S)100-x( SnS2 )x at X=[ 30,40, &50)]% with thickness (0.9±0.03)µm , had been prepared by chemical spray pyrolysis method on glass substrates at 573 K. These films were then annealed under low pressure of(10-2) mbar ,373)423&473)K for one hour . This research includes , studying the the optical properties of (Cu2S)100-x-(SnS2)x at X=[ 30,40, &50)]% .Moreover studying the effect of annealing on their optical properties , in order to fabricate films with high stability and transmittance that can be used in solar cells. The transmittance and absorbance spectra had been recorded in the wavelength range (310 - 1100) nm in order to study the optical properties . It was found that these films had direct optical band gap which decreases with the increasing SnS2 ratio , while it increasing with the increase in the annealing temperature at all rati

Structural and optical properties of CdS:Sn thin films prepared by chemical spray pyrolysis method

CdS and CdS:Sn thin films were successfully deposited on glasssubstrates by spray pyrolysis method. The films were grown atsubstrate temperatures 300 C°. The effects of Sn concentration on thestructural and optical properties were studied.The XRD profiles showed that the films are polycrystalline withhexagonal structure grown preferentially along the (002) axis. Theoptical studies exhibit direct allowed transition. Energy band gapvary from 3.2 to 2.7 eV.</jats:p

Study of Properties of Cadmium Sulfide Prepared by Chemical Spray Pyrolysis Method

In this paper, we prepare thin films of CdS using the method of spray pyrolysis with thicknesses (150,200,250) nm. The optical, electrical and structural properties have been investigated for those films ready on glass substrates. Cadmium sulfide membrane has a polycrystalline structure of the hexagonal type. An increase in thickness did not affect the crystalline nature of the material as the material remained polycrystalline. Optical properties included the calculation of energy band gaps of the allowed direct electronic transitions. The energy band gap for CdS in the range (2.2-2.7)eV . The calculations also included some optical constants, such as transmittance also absorption coefficient. The increase in thickness led to an increase in the absorbance and absorption coefficient as well a decrease in the transmittance. The electrical properties include D. C. electric conductivity Hall effect. It was showing that the type of CdS films were (p-type)

The effect of thickness on the optical properties of Cu2S thin films

In this work, the optical properties of Cu2S with different thickness(1400, 2400, 4400) Ǻ have been prepared by chemical spray pyrolysis method onto clean glass substrate heated at 283 oC ±2. The effectof thickness on the optical properties of Cu2S has been studied. Itwas found that the optical properties of the electronic transitions onfundamental absorption edge were direct allowed and the value of theoptical energy gap of Cu2S (Eg) for direct transition decreased from(2.4-2.1) eV with increasing of the thickness from (1400 - 4400)Ǻrespectively. Also it was found that the absorption coefficient isincreased with increasing of thicknesses. The optical constants suchas extinction coefficient, refractive index and the imaginary part ofthe dielectric constant have similar termed of variation for theabsorption coefficient.</jats:p

The effect of thickness on the optical properties of Cu2S thin films

In this work, the optical properties of Cu2S with different thickness (1400, 2400, 4400) Ǻ have been prepared by chemical spray pyrolys is method onto clean glass substrate heated at 283 oC ±2. The effect of thickness on the optical properties of Cu2S has been studied. It was found that the optical properties of the electronic transitions on fundamental absorption edge were direct allowed and the value of the optical energy gap of Cu2S (Eg) for direct transition decreased from (2.4-2.1) eV with increasing of the thickness from (1400 - 4400)Ǻ respectively. Also it was found that the absorption coefficient is increased with increasing of thicknesses. The optical constants such as extinction coefficient, refractive index and the imaginary part of the dielectric constant have similar termed of variation for the absorption coefficient

Structural and optical properties of CdS:Sn thin films prepared by chemical spray pyrolysis method

CdS and CdS:Sn thin films were successfully deposited on glass substrates by spray pyrolysis method. The films were grown at substrate temperatures 300 C°. The effects of Sn concentration on the structural and optical properties were studied. The XRD profiles showed that the films are polycrystalline with hexagonal structure grown preferentially along the (002) axis. The optical studies exhibit direct allowed transition. Energy band gap vary from 3.2 to 2.7 eV

Antimicrobial Activity of ZnO Nanoparticles Prepared Using a Green Synthesis Approach

Zinc oxide nanoparticles (ZnO NPs) were synthesized from cinnamon and bay leaves using chemical and environment-friendly synthesis approaches. The biosynthesized NPs were characterized using X-ray diffraction (XRD), which confirmed their crystalline nature. The morphology of the NPs was analyzed using scanning electron microscopy. The XRD analysis data showed average grain sizes of 9.968, 18.547, and 29.983 nm for the ZnO NPs. Energy-dispersive X-ray spectrum and XRD patterns showed that the synthesized ZnO NPs were unadulterated. These ZnO NPs were then used as antibacterial agents against Gram-positive (Staphylococcus aureus and Staphylococcus epidermidis) and Gram-negative bacteria (Escherichia coli and Klebsiella pneumoniae). The antifungal activity of the biosynthesized NPs was also tested against common unicellular fungi (Candida albicans). The results showed that ZnO NPs extracted from cinnamon demonstrated a higher antibacterial activity compared with those of the NPs extracted from bay leaves or the chemically prepared ones