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Detailed studies on thickness dependence, 100-400nm, of the optical, electrical, and structural properties have been carried out on AsSeGe thin film samples prepared by thermal evaporation technique. The optical transmission and reflection spectra of these films were measured in the range of 200-1100nm. The mechanism of the optical absorption follows the rule of forbidden non-direct transition. The...
The angular coefficients method based on the analogy between laws of radiation and diffusive reflection of molecules, used earlier for the calculation of conductance coefficients for channels with intricate contours and for the calculation of the conductance of slots and the channels of the molecular pump with cylinder rotors, is used in this paper to calculate the conductance of channels with more...
Thin films of InSe were obtained by thermal and flash evaporation techniques on glass substrates maintained at various temperatures (T S =30, 100, 160, 200 o C). The best films were obtained for a substrate temperature of 160 o C followed by annealing at 200 o C for 6h. Analysis of the films showed strong decomposition of films obtained by thermal evaporation. Structural...
Duplex treatment, a newly developed surface modification method, was used to improve the tribological properties of an aluminum alloy. In this paper, the 2024 Al was anodically oxidized first and then coated with REMF-MoS 2 -Au nanocomposite film and Ti/Ag dual layer film by rf-sputtering and multi-arc ion-plating, respectively. It is shown that duplex treatment, especially sputtered REMF-MoS...
Thin films of Ge 30 Sb 10 S 60 are deposited on a glass substrate by thermal evaporation under vacuum. The optical constants (the refractive index n and the absorption index k) have been calculated in the wavelength range 400-900nm using a transmission spectrum. Both n and k were found to be practically independent on the film thickness in the range of 550-1200nm...
Indium phosphide (InP) is a promising semiconductor used as a basic substrate for micro and optoelectronic devices. However, its use to form components on III-V substrates has provided some technical problems (Bideux L et al. Surf Interface Anal 1993;20:803-7; Hollinger G. J Appl Phys 1990;67:4173). Also, the InP surface must be treated and well passivated before the deposition of the insulator. We...
Inclusions in primary aluminium were analysed with an electron-probe microanalyser and a high-resolution Auger electron spectrometer. In multiphase eutectic and complex inclusions the presence of calcium, magnesium, iron, copper, molybdenum and aluminium was detected. Prior to Auger analysis, sufficient ion etching is necessary for the elimination of oxides from the surface. The complex inclusions,...
It is demonstrated that the magnetic filtering duct can work as the second anode in a filtered cathodic vacuum arc discharge (FCVAD). Influences of the focusing magnetic field and duct positive bias on the arc discharge were studied. An equivalent circuit for the FCVAD is presented and used to simulate the arc behavior with the filtering duct working as second anode, and the simulated results agree...
During electron beam processing, a fraction of the incident power gets backscattered from the target surface, which can be as high as 40% of the incident beam power depending on the beam energy and atomic number of the target material. In the case of a strip electron gun, a uniform magnetic field is used for focusing and deflection of electron beam through 270 o . With the strip beam (78mmx5mm,...
Transparent and colourless nanostructured titanium dioxide thin films have been fabricated on microscope glass slides by the dc magnetron reactive sputtering method using Ar and O 2 as working gases. X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and UV-Vis-NIR spectrophotometer technologies were used to characterize the films. The stoichiometric TiO 2 thin films with...
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