Materials Literature
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Within the framework of perturbation theory the imaginary part of the phononless conduction of a lightly doped compensated semiconductor is calculated. It is shown that when the basis of localized atomic-like functions is used, the superlinear frequency dependence of the real part of the conduction corresponds to the…
Cyclic voltammetry is a common characterization technique for electrochemical reactions of electroactive species. Cyclic voltammetry is an important characteristic to determine the performances of energy storage devices such as battery and supercapacitor. In this paper we focus on the interdigital electrode with the v…
We take advantage of the 3D finite difference time domain method to systematically investigate the metallic periodic bowtie antennas. The dipoles oscillating picture is proposed to demonstrate the great enhancement of localized near-field, as well as the resonant intensities variations and dips shift.
We studied polycrystalline tetragonal LaFeAsO0.9F0.1 up to 9 GPa using time-of-flight neutron and synchrotron X-ray diffraction. Consistent with previous studies, the layer-structured LaFeAsO0.9F0.1 has a bulk modulus of 74–79 GPa, with the c−axis being twice as compressible as the a−axis. The refined structural param…
The electric field is crucial to the research on the characteristics of long air gap discharge, which is of great importance to the development of ultra high voltage (UHV) projects. The measuring of electric field is one of the hot spots and makes great sense while doing the research. In this paper, an electric field…
In the present work, rolling contact fatigue (RCF) tests in water were performed on AISI 440C stainless steels under different loading. Each test was interrupted at 3.6×104, 7.2×104, 1.44×105, 2.16×105, 2.88×105 and 2.88×105 rotating cycles and the wear track at different stages was observed by using a 3D laser confoc…
The influence of heating temperature on the properties of nanocomposited poly [2-methoxy 5-(2'-ethyl-hexyloxy)-1,4-phenylene vinylene (MEH-PPV) polymer and titanium dioxide (TiO2) thin films has been investigated. The heating temperature was varied from 50°C, 75°C, 100°C, 125°C and as deposited thin films as reference…
Problems of selecting the optimum parameters of electron-probe systems when scanning areas on the order of 1 cm 2 with resolutions of 3–20 nm and the real-time control of these parameters during scanning are considered. The obtained dependences open the possibility of solving certain problems in fully automating the a…
The magnetic forces acting on the rotor of Permanent Magnet Synchronous Motors are often neglected because of the symmetry of the winding. But for a fractional slot number per pole and per phase, the winding design is not symmetric. This leads to an asymmetry in the flux density distribution which is the source of the…
The frequency-dependent conductivity of Polyaniline (PAni)-Polyethylene (PE) composites were measured at different mass concentrations using terahertz time-domain spectroscopy. The frequency-dependent behavior followed the Mott-Davis behavior, which showed variations of the fitting parameter S with different mass frac…
A new disaccharide block for OSW-1 natural steroidal antitumor agent was described. Regioisomeric 2- and 3- O - p -methoxybenzoyl derivatives of phenyl 1-thio-β- d -xylopyranoside and phenyl 2- O -acetyl-1-thio-β- l -arabinopyranoside derivatives blocked at positions 3 and 4 by R 3 Si groups were synthesized with a vi…
Strain induced self-assembled Stranski-Krastanov growth of semiconductor islands on patterned substrate has shown great improvement of island size uniformity and spatial order. Here, we show self-assembled Volmer-Weber (V-W) growth of Si nanocrystals (NCs) on patterned SiO2 substrate via traditional chemical vapor dep…
Gold nanoparticles (AuNPs) used for therapeutic applications preferentially accumulate in the liver following exposure. However, uptake and clearance by hepatic cells are not well understood. Time-dependent intracellular localization, uptake and clearance of 30 nm AuNPs were monitored in primary rat hepatocytes and li…
The microstructures of 75X3MΦ steel specimens that were sampled from forged pieces of support shafts of rolling mills was investigated. A correlation between the presence of a carbide network and increased attenuation of ultrasonic waves was established. Ultrasonic testing was performed using a Krautkremer ultrasonic…
We investigated the pH effect on the carrier transport in conducting polymer PEDOT:PSS films by the combination of terahertz and infrared-ultraviolet spectroscopy, which revealed that the increase of the pH decreased the DC conductivity resulting from the decrease of carrier density and mobility due to the weak carrie…
A kinetic one-dimensional spherically symmetric model of heating of metal microdroplet (with radius 1-2 micrometers) by surrounding plasma was developed. The kinetic model is a model of 1D3V PIC/DSMC type. The model describes the thermo-field electron emission and evaporation from the droplet surface as well as corres…
Moisture has strong influence on insulation performance of oil pressboard system in power transformer. Moisture in oil immersed pressboard is uniform under constant temperature condition. Moisture in pressboard can be calculated according Oommen paper oil equilibrium curves. Temperature of power transformer is related…
An experimental investigation on the buried internal explosion in finite thickness concrete targets was carried out, with the aim at developing an available criterion for the critical collapse of rear-surface to determine the critical collapse thickness and the critical amount of explosive charge under different depth…
The transient shielding performances of small transparent cubic boxes illuminated by an impulsive plane wave, exciting the frequency range up to several gigahertz, are analyzed by applying an 3D full wave method. The box is made by transparent polycarbonate walls coated with a thin nanostructured transparent film, con…
A technique for synthesizing catalytically active zinc oxide-based nanostructures is described. The synthesis product represents a blue-gray powder. When it is introduced into a water solution of methyl orange the latter bleaches out both under daylight and in the dark. The activity of the material is measured by the…