Materials Literature
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Poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) is usually sandwiched between indium tin oxide (ITO) and a functional polymer in order to improve the performance of the device. However, because of the strong acidic nature of PEDOT:PSS, the instability of ITO/PEDOT:PSS interface is also observed. Th…
A new layered Cu-based oxychalcogenide Ba 3 Fe 2 O 5 Cu 2 S 2 has been synthesized and its magnetic and electronic properties were revealed. Ba 3 Fe 2 O 5 Cu 2 S 2 is built up by alternatively stacking [Cu 2 S 2 ] 2− layers and iron perovskite oxide [(FeO 2 )(BaO)(FeO 2 )] 2− layers along the c axis that are separated…
Author version of an article published in the International Journal of Engineering Research and Applications (IJERA), Vol. 6, Issue 2 (Part 3), 2016.
Catalyst-free growth of one-dimensional zinc oxide (ZnO) nanowires is reported. ZnO nanowires were synthesized on ZnO buffer layers deposited on various-oriented sapphire substrates. Syntheses of ZnO buffer layers and nanowires were performed by ultraviolet pulsed-laser deposition. ZnO nanowire's number density was th…
Magnesium phosphate cements (MPC) had been used as repair materials for deteriorated Portland cement concrete structures. In this paper a new MPC was prepared and the basic properties including workability and compressive strength were tested. The acid attack resistance of MPC was investigated by immersing the MPC mor…
Method for solving a boundary value problem of inhomogeneous unsteady-state heat conduction transfer is considered. This physical process can be described by a boundary value problem for a partial differential equation of the 2nd order. Discrete-analytical method, which turns out the mathematical formulation of the in…
We present a mathematical model and results of computational experiments aimed at investigating multipass zone refining kinetics based on the concept of average impurity concentration in the ingot portion being refined and demonstrate that ultrapurification of an ingot at a small molten zone length has an induction pe…
In the shrinkage flanging, the wrinkling tends to occur due to compressive stress. The wrinkling will cause a difficulty in assembling parts, and severe wrinkling may leads to rupture of parts. The shrinkage flange of the ultra-high strength steel sheets not only defects the product by the occurrence of the wrinkling…
Lead‐free sodium bismuth titanate–aluminate bismuth [0.97(Na 0.5 Bi 0.5 )TiO 3 –0.03BiAlO 3 ] solid‐solution films deposited on (100) Pt/TiO 2 /SiO 2 /Si substrates by a sol–gel process were pyrolyzed and annealed at different temperatures. The film annealed at 725°C with a pyrolysis temperature of 410°C exhibited the…
We investigate hybrid magnetic heterostructures consisting of thin epitaxial films of oxide ferromagnets La0.7Sr0.3MnO3 and intermetallic superlattices (TeCo2/FeCo) n . The magnetic characteristics of the heterostructures were studied by the ferromagnetic resonance and magneto-optical Kerr effect techniques. The inter…
The adsorption of lithium atoms on carbon nanotubes with double vacancy structural defects (2V-defect) is being studied with first-principle modeling. The structure of defective tubes in ground state is considered, the role of effects related to finite sizes of a model is evaluated. It is demonstrated that the locatio…
Field measurements of insulator leakage current are necessary for long term data storage for research purposes and condition-based maintenance. Long term monitoring and storage of actual waveform are required since the electrical activity on the insulator surface cannot be predicted in advance. This leads to the accum…
We study the crystal structure and the magnetic properties of Ba1−x Bi x Ti0.9Fe0.1O3 (0 ≤ x ≤ 0.12) ceramics prepared by using a conventional solid-state reaction. X-ray diffraction and Raman scattering spectroscopy measurements show that Bi3+ substitution suppresses the formation of the hexagonal BaTiO3 phase and st…
Ion/electron beam bombardment has shown great potential for improving the surface properties of polymers. Low-energy charged (ion/electron) beam irradiation of polymers is a good technique to modify properties such as electrical conductivity, structural behavior, and their mechanical properties. This paper reports on…
The present work is devoted to the examination of new radiation-protective binder for special-purpose composite materials. The mixture for such advanced binder is developed. The mixture includes portland cement together with special component – barium hydrosilicates. The latter are micro-sized mineral admixtures which…
Pt-Cu bimetallic alloys, as a key component in many heterogeneous catalysts, have the potential to be used in a range of industrially important reactions. The stability of platinum-modified Cu(1 1 0) and Cu(1 1 1) surfaces in the absence/presence of CO, NO and O has been investigated based on density-functional theory…
High potential of two-photon confocal microscopy for photoluminescent tomography of bulk semiconductor crystals are demonstrated in this work using ZnSe crystals as an example. The first results of investigation of ZnSe bulk crystals, both undoped and doped by 3 d metals, are presented. Appearance of luminescence quen…
A complete understanding of the bubble dynamics is deemed necessary in order to achieve their full potential applications in industry and medicine. For this purpose it is first needed to expand our knowledge of a single bubble behavior under different possible conditions including the frequency and pressure variations…
The aim of this study has been to determine the quality of flake graphite in high-grade metamorphic rocks in Sortland, Vesteralen, northern Norway. Flake graphite is present in graphite schist and samples were collected at three different locations, Hornvatnet, Lamarkvatnet and Vikeid. The host rocks of the graphite s…
Coprecipitation followed by sintering were used to synthesize nanocomposite materials in the CoO–SnO 2 system under various conditions. The crystal structure, morphology, chemical and phase transformations of the materials were examined. The specific capacity of the materials was determined in their possible use as el…