Mahrous R Ahmed

Professor -

Faculty of science

Address: Physics Department - Science Faculty - Sohag University - Egypt



Publications Which contain the keyword: Thin films

2021-08-29 14:16:21 Keywords Thin films,
Influence of different types of substrates on the physical properties of CdSe films
Cadmium Selenide, CdSe, thin films deposited on different substrate types; FTO/glass,/glass, and ITO/glass substrates were produced by thermal evaporation method in the room temperature. The influence of different types of substrates on the structural, optical and electrical properties of the films was studied by X-ray diffraction and absorption photo spectroscopy respectively. X-ray diffractions revealed that all the CdSe films have ... Read more

2021-08-29 14:08:03 Keywords Thin films,
Effect of RF power of Al2O3 target on the physical properties of aluminum‑doped zinc oxide films
In this report, we investigate the optical and electrical properties of aluminum zinc oxide (AZO) thin films using magnetron sputtering method in preparing the thin films and spectrophotometer to measure the optical characteristics. The X-ray diffraction (XRD) patterns of the films are found to have amorphous structure. The optical band gap _E_g, refractive index _n_, electronic polarizability, carrier concentration _N_c, ... Read more

2020-07-25 16:31:18 Keywords Thin films, Ion implantation,
Mechanical and ellipsometry measurements of thin TiN layer prepared by PIII
Titanium nitrides have good mechanical, biomedical and optical properties, therefore they are used to harden and protect cutting and sliding surfaces and as a non-toxic exterior for bio-medical applications. Nitrogen plasma immersion implantation (PIII), in which the diffusion of nitrogen from low pressure r.f. plasma is combined with the implantation of nitrogen ions at energies up to 30 kV, is ... Read more

2018-11-27 19:55:24 Keywords Optical characteristics, Thin films, Chalcogenides,
Characterization and optical properties of bismuth chalcogenide films prepared by pulsed laser deposition technique
Thin films of Bi-based chalcogenides were prepared by pulsed laser deposition (PLD) technique according to the stoichiometric formula: Bi2(Se1−xTex)3. Their optical properties were studied aiming to find the suitable area of application and the optimum composition amongst the samples under study. X-ray diffraction analysis proved the crystallinity of the deposited samples; in addition, surface roughness and films homogeneity were studied ... Read more

2018-10-05 17:55:02 Keywords Semiconductors, Thin films,
Thickness-dependent dispersion parameters, energy gap and nonlinear refractive index of ZnSe thin films
Zinc selenide (ZnSe) thin films with different thicknesses were evaporated onto glass substrates using the thermal evaporation technique. X-ray diffraction analysis confirmed that both the film and powder have cubic zinc-blende structure. The fundamental optical parameters like absorption coefficient, extinction coefficient and band gap were evaluated in transparent region of transmittance and reflectance spectrum. The optical transition of the films ... Read more

Effect of substrate temperature on physical properties of In2O3:Sn films deposited by e-beam technique
Indium tin oxide (ITO) thin films were prepared by electron beam evaporation at different substrate temperatures. The structural studies were carried out by X-ray diffraction. Optical properties of the films were studied in the ultraviolet-visible-near infrared (UV-Vis-NIR) region (200 to 2500 nm). Electrical studies were carried out at room temperature of ITO films. The results showed that with increase in ... Read more

2018-09-02 21:58:37 Keywords Sintering, Electrical resistivity, Thin films, V2O5,
Sintering process and annealing effect on some physical properties of V2O5 thin films
Thin films of vanadium pentoxide (V2O5) on glass substrates were produced by e-beam evaporation technique. The effect of sintering process and annealing temperature on the morphology and optoelectronic properties of these films were studied. The obtained results from scan electron microscope show that, the grain size of V2O5 films increases with increasing both the temperature of sintering and annealing temperature. ... Read more

Characterization of ITO/CdO/glass thin films evaporated by electron beam technique
A thin buffer layer of cadmium oxide (CdO) was used to enhance the optical and electrical properties of indium tin oxide (ITO) films prepared by an electron-beam evaporation technique. The effects of the thickness and heat treatment of the CdO layer on the structural, optical and electrical properties of ITO films were carried out. It was found that the CdO ... Read more

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