Materials Literature
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Fuels for land and marine diesel engines and for nonaviation gas turbines consist of diesel or biodiesel blends used in diesel engines or nonaviation gas turbine engines. The broad definition of fuels for land and marine diesel engines and for nonaviation
The aim of the work is the fabrication and analytical testing of SERS substrate by modification of inner surface of multicapillary glass structure (MCGS). Silica based composite with embedded silver nanoparticles (AgNPs) was used for MCGS modification. The testing was carried out by performing solid phase extraction o…
In this paper optical characteristics of porous silicon layers and nanoparticles are investigated. Samples were obtained by electrochemical anodic etching of n-type conductivity monocrystalline silicon wafers. It is shown that the surface morphology porous silicon samples are depending on etching technological paramet…
TiO2 coatings have high adhesion to the surface. Any surface applied with TiO2 is easy to position for irradiation with light, in contrast to powders that need to be somehow placed and fixed on the surface. It has been proved that practically any organic compounds can be oxidized (mineralized) on the TiO2 surface. In…
We studied the discontinuous stationary solutions for the rheological mesoscopic modified model of Pokrovskii-Vinogradov, which describes the dynamics of liquid polymers. The Rankine-Hugoniot conditions for the model were introduced. We justified the existence of stationary solutions with flat surface of strong discon…
In the work, GaAs photovoltaic convertor structures with embedded In 0.8 Ga 0.2 As arrays of quantum dots (QDs) have been obtained by metalorganic vapor-phase epitaxy. Spectral characteristic of internal quantum yield showed two spectral peaks at 930 and 985 nm of photosensitivity beyond the GaAs absorption edge. A th…
Perovskite based on methylammonium lead iodide (MAPbI 3 ) have attracted great attention for the past few years as promising materials for both photovoltaics and photodetector technologies. In this work, we report on the solution-processed of MAPbI 3 via spin-coating method prepared at high humidity condition. The com…
The surface diffusion equation is one of the geometric evolution laws and was first derived by Mullins [6] to model the development of surface grooves at the grain boundaries of a heated polycrystal. It is known that the surface diffusion equation is obtained as the H -1 -gradient flow of the area functional for the e…
Electronic structure of the ceramic multiferroic BiFeO 3 and ultrathin Ba/BiFeO 3 interface was studied in situ using photoelectron spectroscopy with energies in the range of 120–900 eV. The photoemission from the Bi 4 f , O 1 s , Fe 2 p , and Ba 4 d core levels was studied. An effect of Ba adsorption is found to indu…
In our work we successfully achieved selective removal of GaN epitaxial layer from the Si(111) substrate by photoenhanced wet chemical etching in K 2 S 2 O 8 :KOH solution. Ti, Ni, Ti/Au, Cr/Au metal films were tested as etch masks. In case of thin Ti and Ni films the etch rate was quite low and metals were slightly d…
Abstract Fiber reinforced polymer composite materials find its application in a wide domain due to its mechanical properties. Some of the applications may include sliding motion under various environments making the study of their tribological behavior necessary. In this paper, investigation is done on the tribologica…
Hybrid nanostructures exhibit extraordinary optical properties achieved by the combination of metal and dielectric components in a single nanostructure. Here we numerically study optical properties of metal-dielectric (hybrid) sphere-gap-cone nanostructure. Numerical simulation related to scattering cross section demo…
It is shown experimentally that in photo-thermo-refractive glasses the transformation of charged silver subnanosized molecular clusters to neutral state by UV irradiation results in the increase of glass refractive index. Quantum chemistry calculations suggest that such refractive index change is mainly dominated by s…
Рассмотрено окислительное поведение порошков и пористых порошковых композитов на \nоснове диборида титана – материалов смачиваемых катодов в электролизе алюминия – \nв технологических газовых средах (воздух, аргон, атмосфера под углеродной постелью). \nВ воздухе при 800-1270 К полное окисление происходит за время от н…
In this research, Zn-Ni and Zn-Ni/PTFE coatings were electrodeposited from sulfate-based electrolytes. Potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) techniques were used to investigate the corrosion properties of the coatings. Hardness and tribological behavior of the coatings were exam…
In this work, the modeling of the fluctuations in the current-voltage characteristics of the multi-tip field emitter was produced using adsorption/desorption theory principles. The model is based on two-component emitter with emission sites, which have two different work functions: with adsorbed particles and without…
We report the synthesis of NaYF 4 nanoparticles doped with rare earth ions Yb 3+ , Tm 3+ , using the solvotermal method. These nanoparticles were synthesized varying the concentration of Tm 3+ , considering 0.5%; 1.0%; 1.5% and 2.0% of Tm 3 + instead of the Y ions in NaYF 4 in order to study variations in their emissi…
Experience of robotic systems use during nuclear power units decommissioning in Russian Federation and in other countries is outlined ant summarized. Plan of further development of those works in Russia is presented.
We have investigated the resolution of the two overlapping point sources produced by the defocused incoherent system. By employing the quadratic amplitude filter in the pupil plane, the resultant intensity distributions produced by the incoherent optical system have been modified into a required component, while two-p…
We report on a successful growth of self-organized In 0.3 Ga 0.7 N nanorods by low-temperature plasma-assisted molecular beam epitaxy on a Si(111) substrate with and without preformed thin porous Si layer ( por-Si ). XPS study of both samples confirmed In content predicted according to the growth conditions as well as…