Materials Literature
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Morphology control of rapid grown vertically aligned carbon nanotube forest for fiber spinning is reported. Thermal chemical vapor deposition (CVD) system at around 700°C was used with a catalyst of iron catalyst films deposited on thin alumina supporting layers. Acetylene gas diluted with hydrogen and nitrogen was us…
To improve the surface biocompatibility of titanium films, a electrostatic self-assembly technique (ESA), based on the polyelectrolyte-mediated electrostatic adsorption of chitosan (Chi) and heparin (Hep), was used leading to the formation of multilayers on the titanium thin film surfaces. The film growth was initiali…
New series polymer-bounded manganese complexes were synthesized and their potential structure was investigated. Their application in the oxidation of cumene, by atmospheric pressure of molecular oxygen in the absence of solvent catalyzed by polystyrene-bound-Mn-L (where L=2,2’-bipyridine and 1,10-phenanthroline) compl…
ZnO nanorods were grown on SiO2substrates using a two-step process. In the first step, the formation of seed layers was performed. In the second step, the growth of nanorods above the seeds was carried out via three different methods. The used methods were magnetron sputtering and two types of hydrothermal methods. Th…
Free and forced nonlinear oscillations in three-layered rectangular asymmetric plates that are rigidly restrained along the profile are considered. These plates simulate the panels of some vehicles. The solution to the set of Grigolyuk-Chulkov nonlinear differential equations in a mixed form with respect to resolving…
A polymerization between 1,4-diaminobenzene (PPD) and acrylic acid catalyzed by Horseradish Perodxidase (HRP) in an water buffer will be described in this article. The effects of the concentration of H2O2, the ratio of the acrylic acid to PPD, the pH of the buffer, and the reaction time of polymerization were investig…
The concentration of TiO2 and the composites of TiO2 and 5A zeolite were studied in order to improve the photocatalytic activity of TiO2. Methyl orange aqueous solution was taken as imitated polluted water. The results indicated that the optimum dosage of TiO2 was 200 mg/l. A simple mixture was prepared by adding TiO2…
Based on continuous casting and extrusion (CAXTEX) process, a semisolid metal forming process, continuous rheo-extrusion of magnesium alloy, was proposed. Effect of casting temperature on semisolid region distribution, microstructure formation and stability of forming process, as well as microstructure and mechanical…
Prepared rare-earth La modified amorphous ribbon by doping Rare-earth La in Fe78Si9B13 amorphous alloy. Investigated rare-earth content and temperature, as well as their influence on the magnetic induction effect and it’s amplitude. The results show that, when magnetic field is less than 1356 A / m, with the increase…
ZnO nanorods were synthesized on ZnO / ITO glass substrates using an aqueous solution of zinc nitrate hexahydrate and hexamethylenetetramine. The effects of hexamethylenetetramine concentration on the crystalline structure and surface morphology of ZnO nanorods were investigated. X-ray diffraction (XRD) and scanning e…
The flow stress behavior of Cu-2.0Ni-0.5Si alloy during hot compression deformation was studied by isothermal compression test at Gleeble-1500D thermal-mechanical simulator.Dynamic recrystallization and dynamic recovery during high temperature deformation have been investigated by means of compression tests in the tem…
The growth of a periodic domain structure in LiNbO3 crystals doped with gadolinium (Gd, 0.44 wt %) was investigated by special electron beam surface charging in a scanning electron microscope and on a atomic force microscope. Ferroelectric domain boundaries with “tail-to-tail” and “head-to-head” P s orientations were…
In this study, a sodium hydroxide modified soybean protein adhesive (NSP adhesive) was prepared and mixed with phenol-formaldehyde (PF) resin in a ratio of 7:3 to form a compound adhesive (NSPF adhesive), and three-layer plywoods were prepared using the NSP adhesive and the NSPF adhesive. In order to understand the re…
ZnO nanodot arrays were fabricated by using AAO template combining with sol-gel method. Structure and optical properties of ZnO/AAO composite structure were investigated using scanning electron microscopy (SEM), X-ray diffraction (XRD) and photoluminescence (PL). The SEM results indicated that the pores in the templat…
Plasmonic dimers consist of two nanoparticles in near vicinity of each other, which give the dimer unique properties that the single constituents do not have. Given the increased interest in these types of particles, establishing efficient modeling techniques for dimers becomes essential to be able to design systems w…
The alumina powder was obtained through a technique based on firing irradiated pseudoboehmites powder to study the radiation effects in the alumina properties. The electron beam radiation effect in a pseudoboehmite produced by sol-gel synthesis was investigated, using aluminum chloride and ammonium hydroxide as precur…
In this paper, the numerical design of a optimized quasi-vertical gallium nitride power Schottky diode for high power electronic applications is illustrated. Bevel oxide field plate was employed as a junction termination technique to enhance the breakdown voltage in reverse bias. It was found that a maximum breakdown…
The dynamics of the magnetic-field-induced depolarization of the circularly polarized radiation of spin-oriented triplet bound excitons in uniaxial crystals has been studied by time-resolved spectroscopy on an example of GaSe. The depolarization of radiation (the Hanle effect) is due to the difference between the beha…
The electric performance of polluted insulator string may reduce under high altitude. The paper studies the AC pollution flashover performance of insulators at different height of altitude field and chamber climate separately. The test results show that: The deviation between test results with the artificial and field…
The paper considers the problems of tribological studies under conditions of blade cutting and friction of metals. Experimental results of study of the processes of contact interaction in the presence of lubricant-coolant are presented. The main focus is the description of the original methods developed by the Ivanovo…