Materials Literature
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The article is devoted to the study of the possibility of using ultraviolet radiation to shift the equilibrium of cis-trans-isomerization, which occurs during the hydrogenation of fats towards the formation of cis-isomers at the stage of the appearance of a semi-hydrated complex (carbonium ion).. It has been shown tha…
The peculiarities of current percolation in two-component structures (HTSC-MWNTs) depending on the concentration of components are established. It is established that at 20% nanopowder content there is an increase in the critical temperature of the TC transition to the superconducting state. Discusses the mechanism of…
In this paper, the electrical properties of TiAl- and Ni-based ohmic contacts formed on n-type 4H- and 6H-SiC were studied. The dependence of the contact resistance on technological process was investigated. Ohmic contacts were formed by electron-beam deposition to different surfaces of silicon carbide. Short-term pla…
We studied the influence of nanoscale ZnO films deposited onto GaAs (001) on the process of GaAs epitaxial growth. We took into consideration the most important control parameters of molecular beam epitaxy, such as substrate temperature, As 4 /Ga effective flux ratio and growth rate and different thicknesses of ZnO fi…
In this work, we have studied the interaction between upconversion nanoparticles, and aluminum octacarboxyphthalocyanine in water solutions. It was shown that the self-assembled hybrid complexes are stable in water and NaCl solutions. The efficiency of nonradiative energy transfer from nanoparticles to the aluminum ph…
By means of ab-initio calculations on the basis of the FPLAPW method, we compared the energy loss near edge structure (ELNES) of carbon K edges in crystalline phenanthrene and its isomer, anthracene. In these two organic compounds, different non-equivalent carbon atoms can result in distinct K edge spectra due to the…
An extended 3D discrete-continuous model and its application on single-and bi- crystal micropillars Minsheng
We discuss a two dimensional model that is capable of reproducing, at least qualitatively, some of the experimentally observed features of spin-conversion compounds. The molecules of these compounds have two electronic energy levels separated by Δ. The values of the elastic constants of the springs contained in the mo…
The spatial distribution of the focused high-order vortex Gauss-Laguerre beams is investigated subject to the change of the numerical aperture of the diffraction axicon and order of the vortex phase in the 3D model. Modeling of diffraction is numerically investigated by the finite difference time domain (FDTD) method…
We studied the effect of the growth cell geometry on the temperature fields and the uniformity of semiconductor layers grown by thermal crystallization method from a discrete liquid source. Calculation results show that the radius of local sources practically does not change the temperature field of the substrate. Whe…
The possibility of adsorption of inorganic gases onto the surface of copper-containing polyacrylonitrile (PAN) films was studied by molecular modeling and quantum chemical calculations. For this, the model of a copper-containing PAN cluster was obtained by these methods, which interacted with the adsorbed gas molecule…
Abstract The influence of phonon focusing on phonon transport in semiconductor and dielectric crystals with different types of elastic-energy anisotropy at low temperatures is investigated. McCurdy’s effects in the thermal conductivity of elastically anisotropic crystals in the mode of Knudsen phonon gas flow are calc…
The analysis of the present state of non-destructive testing on railway transport is carried out in the work. It showed that ultrasonic and magnetopowder methods are the most used in the practice of defectoscopy of axles of wheel pairs during the period of their manufacture and repair. Each method has a number of disa…
ШАБАТИН СНИЖЕНИЕ РАДОНООПАСНОСТИ ХРАНИЛИЩ РАДИОАКТИВНЫХ ОТХОДОВВ работе описана методика определения значений объемной активности радона-222 в атмосферном воздухе хранилищ радиоактивных отходов с учетом особенностей их закрытого и открытого типа.В методике учитывается тот факт, что для оценки радоноопасности хранилищ…
An analytical study of the second harmonic generation by metal core - dielectric shell spherical nanoparticles was performed. Dependences of the second harmonic intensity on the dielectric shell thickness were calculated. We demonstrated that the thin coating allows tuning surface plasmon resonance wavelength, whereas…
In article number 1800975 Bin Ai, Yiping Zhao, and coworkers present a fabrication strategy to produce gradient plasmonic nanostructures by a physical vapor deposition on a curved mask substrate covered with a monolayer of close-packed nanospheres. A plasmonic library is easily established in a single fabrication. The…
To extend the postharvest shelf-life of fresh fruits and vegetables, an optimal preservation technology must be applied to control microbial growth and delay ripening. To this end, essential oils from edible plants and their constituents increasingly being exploited by producers to alleviate consumers’ concern on the…
Sensitization function of 2-nitro-1,4-benzenedicarboxylate (NO 2 -BDC 2− ) in the isostructural [(La)(NO 2 -BDC) 1.5 (H 2 O) 4 ] (1) , [(La 0.92 Eu 0.08 )(NO 2 -BDC) 1.5 (H 2 O) 4 ] (2) and [(La 0.92 Tb 0.08 )(NO 2 -BDC) 1.5 (H 2 O) 4 ] (3) have been investigated. Based on the characteristic emissions of 5 D 0 - 7 F j…
The paper presents an analysis of the emission activity of microscopic sites on the surface of a field emission cathode based on nanocomposite with nanotubes in a polymer matrix. The correlation of the total brightness of the registered sites with the total emission current is estimated. The definitions of two types o…
Single crystals of Zn x Cu 1− x V 2 O 7 system with doping concentration of x = 0.05 and 0.15 were grown by the vertical gradient freezing technique. The crystal structures were confirmed by means of x-ray diffraction to be the beta phase of copper pyrovanadate, β -Cu 2 V 2 O 7 , when the Zn concentration was as low a…