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Tin-doped indium oxide (ITO) films were deposited by RF magnetron sputtering on TiO 2 -coated glass substrates (the TiO 2 layer is usually called seed layer). The properties of ITO films prepared at a substrate temperature of 300°C on bare and TiO 2 -coated glass substrates have been analyzed by using X-ray diffraction, atomic force microscope, optical and electrical measurements...
An experimental study of the influence of deposition conditions of GaAs thin films growth, by radio frequency sputtering method, on the structure and the refraction index has been performed. The X-ray diffraction and spectrophotometer results, with different deposition conditions, are reported.The refraction index depends on the structure, which also depends on four deposition parameters, namely,...
CrN films with deposition rates of 130–180nm/min were deposited on Si (111) and carbamide alloy substrates by an ion-source-enhanced middle frequency magnetron sputtering system. Increasing of ion source voltages promoted the growth of CrN films with preferred orientation of (200). The deposited CrN films are composed of nanocrystalline particles with sizes of ∼20nm embedded in polycrystalline matrix...
The c-axis-oriented epitaxial thin films of Mn-doped Pb 1−x La x Ti 1−x/4 O 3 (PLT) on (001) Pt/MgO substrates were prepared by rf-magnetron sputtering. To investigate the effect of the doped ion, 0–1.7mol% MnO 2 added to the PLT target powder. The temperature dependence of the relative dielectric constant ɛ r measurements and modified Curie–Weiss plots...
Ion bombardment is thought to have great potential for improving the optical properties of polymeric materials. In this paper, Poly-Allyl-Diglycol-Carbonate (CR-39) polymer samples were bombarded with 320keV Ar and 130keV He ions, at different ion fluences. Effects of ion bombardment on the optical properties of CR-39 have been investigated using UV–vis spectrophotometer and photoluminescence (PL)...
Faraday cups (FCs) have been used to measure charged particle beams currents for a wide variety of experiments since the early days of particle accelerators. The major error source in FC performance is the escape of ejected electrons produced by energetic particles striking with interior metal surfaces of the FC. To avoid this problem, electrostatic and magnetic guard rings are used. Some kinds of...
In the present work, we have illustrated a new idea of codoping in ZnO with AlN as codopant to achieve p-ZnO. ZnO films doped with different concentrations of AlN were grown by RF magnetron sputtering. The AlN doped ZnO (ANZO) films grown on sapphire substrate were subjected to X-ray diffraction (XRD), reflectance measurements, Hall measurements, atomic force microscopy (AFM) and energy dispersive...
Research on turbomolecular pumps (TMPs) based on the analysis of single blade row has been carried out by a number of investigators Kruger CH, Ph.D. Thesis, Massachusetts Institute of Technology; 1960; Katsimichas S, Goddard AJH, Lewington R, Oliveira de CRE. J Vac Sci Technol A 1995;13:2954; Schneider TN, Katsimichas S, de Oliveira CRE, Goddard AJH. J Vac Sci Technol A 1998;16:175; De Simon M. Vacuum...
Nitrogen depth profile of plasma nitrided pure iron was measured and evaluated by accurate experimental techniques. Plasma nitriding cycles were carried out on high purity iron substrate in an atmosphere of 75% H 2 –25% N 2 . Nitrogen concentration depth profiles in the compound layer and the diffusion zone were characterized by glow discharge optical emission spectroscopy (GDOES)...
The chemical structure and electrical properties of HfO 2 thin film grown by rf reactive magnetron sputtering after rapid thermal annealing (RTA) were investigated. The chemical composition of HfO 2 films and interfacial chemical structure of HfO 2 /Si in relation to the RTA process were examined by X-ray photoelectron spectroscopy. Hf 4f and O 1s core level spectra suggest...
Nano-TiO 2 thin films were deposited on silicon and glass substrates by radio-frequency (RF) magnetron sputtering using TiO 2 ceramic target and characterized by X-ray diffractometer, X-ray photoelectron spectrometer, atomic force microscope, and ultraviolet–visible spectrophotometer. Photocatalytic activity was evaluated by light induced degradation of 5ppm methyl orange solution...
Pinhole defects in deposits are one of the problems which have not yet been solved fundamentally when micro-electroforming of nickel into high-aspect-ratio (HAR) micro-moulds. To reduce the voids of micro-electroformed parts, a new micro-electroforming technique carried out under periodic vacuum-degassing and temperature-difference conditions was introduced in this paper. The effect of vertical temperature...
In the present paper, we report the observation of the Meyer–Neldel rule (MNR) in thermally activated high field conduction in bulk samples of glassy Se 100−x Sb x alloys. We have investigated Meyer–Neldel rule by two different approaches.In first approach, the temperature dependence of d.c. conductivity is studied at different electric fields without changing the composition of the...
Hydrogen is one of the main residual gases in the high vacuum multilayer insulated tank. H 2 adsorption performance of the composite adsorbent was investigated by using a test bench, an X-ray diffraction and a scanning electron microscopy.The composite adsorbent is composed of molecular sieve 5A and getter that includes the different proportion of PdO and Ag 2 O. The getter shall is...
Films of different thickness (50, 100, 150 and 200nm) were deposited by thermal evaporation in vacuum on two types of substrates glass and ITO. The deposition was performed under a pressure of 10 −6 mB with a rate of 0.25nm/s. Films surface investigations showed morphological and structural changes in function of films thickness and the nature of the substrate. Films optical transmission was...
Diamond-like carbon (DLC) films were prepared for a protective coating on nitinol substrate by hybrid ion beam deposition technique with an acetelene as a source of hydrocarbon ions. An amorphous silicon (a-Si) interlayer was deposited on the substrates to ensure better adhesion of the DLC films followed by Ar ion beam treatment. The film thickness increased with increase in ion gun anode voltage...
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