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International Journal of Thin Films Science and Technology



Chemical deposition of polycrystalline ZnSe thin films from Malonic acid solution: Nucleation and growth mechanism, structural, optical and electrical studies

Abstract :
Zinc selenide (ZnSe) polycrystalline semiconductor thin films have been synthesized by dip method in malonic acid solution. The formation of nucleus and growth process of this technique has been studied. The XRD pattern shows a characteristic cubic structure with a (111) crystallographic preferred orientation. SEM studies reveal that grains are uniformly dispersed on the surface of the substrates. The optical energy gap was found to be 2.80 eV. The activation energies are 0.053 and 0.317 eV for low and high temperature region, respectively obtained from electrical measurement.


Antibacterial activity of cadmium oxide nanoparticles synthesized by chemical method

Ahmed Naji Abd,
Abstract :
Abstract In this study, (50 - 110) nm cadmium oxide (CdO) nanoparticles were synthesized by chemical method. The optical, structural and topographical properties of the synthesized nanoparticles were investigated by using UV-VIS absorption, Transmission electron microscopy TEM, atomic force microscopy AFM, and x-ray diffraction XRD. The bacterial resistance represents a problem and the outlook for the use of antibiotics in the future is still uncertain. Therefore, it must be taken measures to reduce this problem. Antibacterial activity of the Cadmium oxide nanoparticles were investigated against several pathogenic bacteria, including Klebsiella pneumoniae; Acinetobacter baumannii; Pseudomonas aeruginosa and Staphylococcus aureus by using well diffusion method ,the results showed that Cadmium nanoparticles had inhibitory effect against all pathogenic bacteria with inhibition zone (18 ,18 ,14 and 17 mm) for S. aureus, K. pneumonia, A. baumannii and P.aeruginosa respectively. CdO nanoparticles had inhibitory effect against S. aureus (22 mm) ; K. pneumonia ( 18mm) and A. baumannii (14mm)..


Study the Synthesis Parameter of Tin Oxide Nanostructure

Abstract :
: In this article, the effect of synthesis parameters on structural properties of SnO2 nanowire by thermal evaporation process, have been studied. The nanostructures are characterized by scanning electron microscopy, Transmission electron microscopy and X-ray spectroscopy. By X- ray diffraction pattern, synthesized SnO2 nanowire were found to be crystalline rutile SnO2. We studied the effect of synthesis parameters such as the deposition temperature, distance variation of the substrate from precursor on the structure of our synthesized nanowires. It was found that their growth was governed by vapor–liquid–solid mechanism (VLS) because of using Sn self catalyst. In this mechanism, the Sn droplet deposited serve as preferred sites for the growth of SnO2 nanowire.

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