Materials Literature
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This paper presents the results of a study of oxygen incorporation in AlxGa1-xAs epitaxial layers during MBE growth. Controlled, low levels of high purity oxygen have been introduced during growth and the structural properties of the layers measured by high resolution x-ray diffraction (HRXRD), while Secondary Ion Mas…
Using non-isothermal thermogravimetry (TG), the oxidation kinetics of oxygen-deficient lithium-titanium ferrospinel, Li0.649Fe1.598Ti0..5Zn0..2Mn0.051O4-δ, manufactured by ceramic engineering is investigated. The oxidation annealing of powder samples is performed in air. According to the X-ray phase analysis, the proc…
We propose a simple way to construct metamaterials with negative refractive index in the terahertz region. The metamaterials composed of dielectric spheres are periodically arranged on a metal-mesh. The transmission spectra show characteristic dispersions peaked at the frequency of the Mie resonance. The combination o…
The effect of the DC transport current (I) on the superconducting and normal properties of ceramic high-temperature superconducting bismuth-based oxides of different compositions was studied by temperature dependent resistivity (r) measurements at fixed points around liquid nitrogen temperature under the presence of E…
Surface Plasmons and particularly Domino Plasmons have demonstrated to present ideal conditions for THz waveguides. However radiators for this technology had not enough attention in the literature. In this paper we propose the use of dense dielectric substrates to obtain a leaky wave antenna with broadband and constan…
A method for detecting dielectric breakdown in the signal of cathodoluminescence in SEM is compared with both capacitive and secondary-emission methods. In the investigated samples of glass dielectrics, breakdowns of two types are found: surface and emission. The prospects for using cathodoluminescence to detect and l…
This paper presents results of a study on solid insulation aging of a number of oil-immersed power transformers, some of them have operated for more than 40 years. The contents of furfurol were measured, in addition to that of dissolved gases in transformer oil, by applying the HPLC method. Based on measured data and…
We developed a new chemical procedure for the fabrication of TiO2dielectric microspheres. We also proposed an elegant way to evaluate of the effective dielectric permittivity and magnetic permeability of single-layer films made of independent resonators. The resonant magnetic response of was observed in the THz range.…
In this paper we will discuss ZnO nanotube formation by chemical wet etching of ZnO nanorod. Photoluminescence measurements and Terahertz time-domain spectroscopy (THz-TDS) [1] are conducted to study its variation of optical properties. The mechanism of nanotube formation is characterized and optical properties are co…
We report the data concerning investigations of photoluminescence spectra of ZnO nanoparticles in the matrixes of liquid crystal materials performed at T = 290 K within a visible region. The mentioned spectra were obtained at polymeric state of Cetylpyridinium Chloride and Disodium Cromoglycate materials.
Matal/oxide nanoparticles with a core-shell structure are of essential importance in theoretical sense and practical application in photocatalysis and dielectric materials. In this work, a novel core-shell structural Ag@Al2O3nanoparticle with aluminum oxide as the covering shell and silver as the inner core was respec…
Micro-actuators using giant magnetostrictive material as the core of drive components are becoming more and more widely used in the field of precise micro-actuator. In order to improve the energy transfer efficiency of the micro-actuator, reduce energy losing as heat and improve the working accuracy of micro-actuator.…
To minimize interfacial power losses, thin layers of NiO, a p-type oxide semiconductor, are inserted between the active organic layer, poly(3-hexylthiophene) (P3HT) [6,6]-phenyl-C61 butyric acid methyl ester (PCBM), and the ITO (tin-doped indium oxide) anode of bulk-heterojunction ITO/P3HT:PCBM/Al solar cells. The int…
High Intensity Focused Ultrasound (HIFU) can ablate tumors located deep in the body through highly localized energy deposition and tissue heating at the target location. The volume of a HIFU-induced thermal lesion can be increased in the presence of cavitation. This study explores the effect of ethanol injection on ca…
An ab initio calculation of the electric-field gradient (EFG) at the site of a phosphorous impurity substituting an Al atom in α-Al 2 O 3 is carried out using the WIEN2k code with the full-potential linearized augmented plane wave plus local orbital method (LAPW+lo) in the frame of density functional theory. The atomi…
This paper deals with a digest on discharge time lag characteristics in a cylindrical void bounded polymethyl-methacrylate (PMMA) and metal using the CIGRE method II (CM-II) electrode system. The specimens were treated by plasma irradiations (0, 3, 6, 11, 16, 21 seconds) simulating material ageing in service which are…
This study presents a novel investigation on thin film Cu2ZnSnS4(CZTS) solar cells in the superstrate structure in which all the semiconductor layers were prepared under non-vacuum conditions. The solar cell structure (SLG)/FTO (Fluorine doped Tin-Oxide)/Ag/CdS/CZTS/Al had the SnO2:F (window), CdS (buffer) and CZTS (a…
The formation of thin silicon carbide layers as a result of solid-phase processes is related to the evolution of nanoscale porosity and chemical reactions on pore surfaces. Numerical experiments, which simulate blistering under the action of Xe+ ions in the metal-insulator (Mo/Si) bilayer make it possible to establish…
Using the equipment of the Russian-German beamline of the synchrotron radiation at the BESSY II electron storage ring, satellite spectra accompanying the C1 s core lines in the cases of single-walled carbon nanotubes and highly ordered pyrolytic graphite have been measured with a high energy resolution. The Auger spec…
The energy landscape of the polyalanine Ace-(Ala) 10 -NMe, one of the standard models for the study of α -helix folding, is investigated using conformational space annealing (CSA) and the all-atom CHARMM force field (param22). The native α -helical conformation is obtained for all 100 CSA runs. Gathering all conformat…