bluuebunny/crossref_metadata_2025_split huggingface dataset:
Cluster radioactivity: analysis, forecast, new factors of slowing the decay of atomic nuclei
Authors: Okunev V S 
Published: December 2019

Abstract
Some regularities of cluster decays are revealed, which make it possible to predict the existence of a large number of medium, heavy and, possibly, superheavy f-active nuclei. The stability of the majority of non-magic nuclides (products of cluster radioactivity) is explained by the simultaneous action of the already known factors slowing (stabilizing) the radioactive decays of atomic nuclei and some additional factors. Among the additional factors, a weakly expressed effect of pairing of α-particles in light nuclei can be noted. In some cases, an additional particle (neutron, proton or light cluster) contributes to the stability of the nucleus by intensifying the forces of mutual nuclear attraction. Compact arrangement of α-clusters in another additional factor stabilizing the nuclei. One more factor is associated with compact placement of neutrons (possibly paired) between α-clusters within the of light nuclei.
On the research of the magnetic field between the plates of a plane capacitor
Authors: Sumnitelnyi N V , Sorokin D L 
Published: December 2019

Abstract
The purpose of the paper was to consider the impact of the displacement current in magnetic field in the vicinity of the plane capacitor plates. We obtained a magnetic field model that accounted for the effects of both displacement currents and conduction currents. Theoretical calculations of the surface on which the magnetic field changes the direction were performed.
RKDG method for 2D gas dynamics simulation on uniform rectangular meshes
Authors: Korchagova Victoria , Fufaev Ivan , Lukin Vladimir , Marchevsky Ilia , Sautkina Sofya 
Published: December 2019

Abstract
This paper is devoted to a numerical simulation of 2D gas dynamics flows on uniform rectangular meshes using the Runge - Kutta - Discontinuous - Galerkin (RKDG) method. The RKDG algorithm was implemented with in-house C++ code based on the experience in the investigation of 1D case. The advantage of the RKDG method over the most popular finite volume method (FVM) is discussed: three basis functions being applied in the framework of the RKDG approach lead to a considerable decrease of the numerical dissipation rate with respect to FVM. The results of the acoustic pulse simulation on a sufficiently coarse mesh with the piecewise-linear approximation show a good agreement with the analytical solution in contrast to the FVM numerical solution. For the Sod problem, the results of the discontinuities propagation illustrate the dependence of the scheme resolution on the numerical fluxes, troubled cell indicator and the limitation technique choice. The possibility to resolve strong shocks is demonstrated with the Sedov cylindrical explosion test.
Assessment of selected parameters of concrete composite containing recyclate obtained from fire-resistant cullet
Authors: Powęzka A , Ogrodnik P , Biedugnis S , Szulej J 
Published: December 2019

Abstract
The purpose of the work is to determine the possibility of using waste from waste heat-resistant cullet as a filler in concrete composites. The article discusses the results of testing selected performance properties of the designed concrete composite. The samples were tested for mechanical properties: compressive strength, impact resistance. Research also included identifying structural changes in the designed composite.
Initial growth state MoS2 thin film by magnetron sputtering
Authors: Belikov A I , Dolomanzhi A , Kalinin V N , Nhan Do Thi , Phyo Kyaw Zin , Syomochkin A I 
Published: December 2019

Abstract
MoS2 thin films were grown on sapphire substrates by the MoS2 target magnetron sputtering, using the DC mode in Ar atmosphere at the substrate temperature of 200 °C for 10, 20 and 30 sec. The results of AFM studies have shown that the morphology of MoS2 thin films changes significantly with the increase of the process time. At the initial stage of growth, after 10 sec of deposition, a continuous film about 3.5 nm thick was observed.
Effect of morphology features of patterned surface on the nucleation processes of In/GaAs nanostructures during droplet epitaxy
Authors: Chernenko N E , Balakirev S V , Eremenko M M , Solodovnik M S 
Published: December 2019

Abstract
We present the results of theoretical studies of the self-organization processes of nanoscale metal In droplets on GaAs(001) substrates with artificial structural heterogeneities of various types – with a rectangular, trapezoidal, and triangular shapes. The study showed that to improve the accuracy of nanostructure positioning and homogeneity, it is necessary to use patterns with triangular grooves. In order to ensure the full groove filling by the material and to suppress the undesirable structure formation outside modified areas, it is necessary to provide sufficient diffusion length of adatoms taking into account the peculiarities of the patterned surface morphology.
The study on agglomerates of WC, TiC, TaC nanopowder mixtures obtained from hard-alloy waste products
Authors: Gavrish V. , Chayka T. , Baranov G. 
Published: December 2019

Abstract
The paper presents findings of the nanopowder obtained from hard-alloy waste (a mixture of tungsten, titanium, and tantalum carbides) under a unique technology. Dispersion, particles’ morphology have been studied. Chemical purity of this nanopowder has been confirmed by X-ray spectral microanalysis.
Study of the mechanical characteristics of the Al2O3 film on the LiNbO3 substrate
Authors: Shumilin A , Shumilina I , Fomin A 
Published: December 2019

Abstract
The microhardness of a thin aluminum oxide film with a thickness of 80 to 240 nm on the surface of a lithium niobate single crystal was determined by the method of nanoindentation. The hardness and Young’s modulus for a film deposited by dc-magnetron sputtering of an aluminum target in a gas (Ar+O2) medium were more than 30 GPa and 300 GPa, respectively. The dependences of the film thickness on the mechanical properties of a layered system, in particular hardness and elastic modulus, were established.
Formation of SiO2 buffer layer for LiNbO3 thin films growth
Authors: Vakulov Z E , Klimin V S , Rezvan A A , Tominov R V , Korzun K , Kots I N , Polyakova V V , Ageev O A 
Published: December 2019

Abstract
This paper shows the results of study of the effect of SiO2 buffer layer thickness on the morphological parameters of nanocrystalline LiNbO3 films formed by pulsed laser deposition. It has been established that with increasing in the thickness of SiO2 buffer layer from 10 nm to 50 nm, the roughness of LiNbO3 films decreases from 5.1 nm to 4.4 nm. The minimum value of the grain diameter (118 nm) corresponds to the thickness of the buffer layer equal to 50 nm. The results obtained can be used in the design and manufacture of integrated acousto-optic and piezoelectric devices, as well as sensitive elements of sensors using various effects of surface acoustic waves.
Study of the ITO sublayer influence on the tubular carbon nanostructures formation
Authors: Il’in O I , Rudyk N N , Kuzhelev M V , Il’ina M V , Fedotov A A 
Published: December 2019

Abstract
The study of the formation of catalytic centers and the growth of CNT-based TCN was carried out on the Ni (10 nm)/ITO (100 nm)/Si (370 μm) structure. Shown that the temperature at the stage of heating and growth has a significant impact on the parameters of the formed TCN. Promising for instrumental use, the TCN were formed at a temperature of 750 °C, a heating time of 20 minutes, an activation time of 3 minutes. The effect of plasma ions at the stages of «activation» and growth was also demonstrated.
Fabrication and luminescent properties of(In,Fe)Sb/GaAs/InGaAs diodes
Authors: Ved M. V. , Dorokhin M.V. , Lesnikov V. P. , Zdoroveyshchev A.V. , Danilov Yu.A. , Demina P.B. , Kudrin A. V. 
Published: December 2019

Abstract
The electrical and luminescent characteristics of InGaAs/GaAs spin light-emitting diodes with an injector based on (In,Fe)Sb were investigated and the circular polarization of the electroluminescence was obtained for such structure. It has been established that the deposition of (In,Fe)Sb layer does not introduce any additional defects into the region of near-surface quantum wells, but directly affects the (In,Fe)Sb/GaAs interface. It was found that the application of a thin protective layer of MgO between the ferromagnetic (In,Fe)Sb injector and the light-emitting structure minimizes this effect.
Simulation of AlGaAs-heterostructures CVC kinetic due to degradation
Authors: Shasurin V D , Vetrova N A , Meshkov S A , Ivanov Y A , Kuimov E V 
Published: December 2019

Abstract
A model of degradation of AlGaAs-heterostructures has been developed. Parasitic resistance growth and diffusion of aluminum and donor impurities are considered as the main reasons of degradation of the structure. Current transfer models are generalized to the case of structures with continuous impurity distribution profiles. Algorithms based on numerical methods with reduced time complexity have been developed. RTS CVC was calculated before and after the annealing operation in order to verify the models. According to the results of the calculation, it was concluded that the developed algorithms are advisable for reliability prediction applications.
Synthesis of glycidoxy spacer on the surface of magnetic nanoparticles and immobilization of albumin
Authors: Korolev D V , Gareev K G , Zorin V N , Evreinova N V , Postnov V N , Romanova T N 
Published: December 2019

Abstract
The glycidine spacer was synthesized from three different solvents. It is shown that the samples synthesized from benzene have the highest efficiency. Human albumin was immobilized onto a glycidine spacer. A mechanism for the interaction of albumin with a glycine spacer is proposed. An analysis of the determination of albumin adsorbed by magnetic nanoparticles was performed in this work.
Optical spectral sensor for the assessment of uric acid kinetics during hemodialysis treatment
Authors: Konoplev G A , Stepanova O S , Zemchenkov G A , Frorip A 
Published: December 2019

Abstract
The dual-wavelength direct spectrophotometric method for uric acid determination in effluent dialysate and deep UV LED based optical spectral sensor for non-invasive online hemodialysis monitoring were developed. The time profiles of uric acid concentration in effluent dialysate were recorded for a group of 12 patients and 88 hemodialysis sessions by means of the sensor. The parameters of the double-pool kinetic model for each session were assessed and analyzed. The feasibility of online optical monitoring in the UV region as a useful and convenient tool for the experimental investigation of uric acid kinetics during hemodialysis was demonstrated.
Fluorescent detection upon droplet amplification of nucleic acids
Authors: Tupik A , Bulyanitsa A , Rudnitskaya G , Posmitnaya Y , Varlamov D , Evstrapov A 
Published: December 2019

Abstract
Droplet microfluidics with amplification of nucleic acids allows to achieve sensitivity at the level of single molecules and is in demand in medical diagnostics, forensic science, and genetic research. The results of detection of nucleic acid amplification in liquid and water-in-oil emulsion are compared on the example of model solutions. Since the results of quantitative analysis are based on the calculation of the proportion of drops with a positive reaction result, one of the tasks was to study the features of automatic counting of drops in different zones of the reaction chamber.
Indications on self mode-locking in a broad area single-section quantum dot laser
Authors: Auth D , Korenev V V , Savelyev A V , Maximov M V , Zhukov A E , Breuer S 
Published: December 2019

Abstract
Broad-area edge-emitting monolithic mode-locked semiconductor quantum dot lasers emitting at 1.26 μm could potentially serve as ideal sources for the generation of high power broad optical frequency combs for short-reach inter and intra data-center links. In this contribution, the inter-mode beat frequency of a 2 mm long InAs/InGaAs quantum dot laser with a broad-ridge waveguide are studied experimentally. Laser output power, radio-frequency and spectral domain analysis is performed. -3 dB spectral widths ranging from 2nm to 5.3 nm and the existence of an inter-mode beat frequency at 20.4 GHz with a signal-to-noise ratio from 2 dB up to 11 dB are experimentally confirmed for injection currents from 0.225 A to 1 A. Our results indicate a potential way towards high output power optical frequency comb generation by electrically injected monolithic semiconductor lasers.
Performance of InGaAs metamorphic laser power converters at different conditions
Authors: Kalyuzhnyy N A , Evstropov V V , Mintairov SA , Mintairov MA , Salii R A , Shvarts M Z 
Published: December 2019

Abstract
The topic of the work is the metamorphic InGaAs heterostructures for laser power converters (LPC) and their performance at different measurement conditions. Three different illumination conditions were studied: monochromatic Xe-lamp uniform illumination, laser with quasi-uniform illumination (with laser beam unfocusing) and non-uniform focused laser illumination. For simulating the experimental IV-curves as well as FF-Jg, Voc-Jg
and η-Jg
dependences, a tube model developed earlier and describing the charge carrier transport along current lines was used for all three illumination regimes. In the absence of losses (Xe-lamp and unfocused laser), the perfect model simulation model exhibiting an experimental efficiency greater than 50% (for λ=1064nm) has been demonstrated. As a result of simulation of LPC characteristics obtained under focused laser illumination, the losses associated with uniform light distribution as well as with an additional resistance, which decrease the LPC efficiency, have been found.
Relation between energy gap and saturation currents in GaInAs homo p-n junctions
Authors: Mintairov M.A. , Evstropov V.V. , Mintairov S.A. , Shvarts M.Z. , Kalyuzhnyy N.A. 
Published: December 2019

Abstract
The paper is devoted to the relationship between the energy gap and the saturation currents (diffusion and recombination ones) of GaInAs homo p–n junctions. Such a relationship is required for developing multi-junction solar cells and photodetectors for a given wavelength. The saturation currents and the energy gap have been determined experimentally, and an empirical exponential formula was obtained for the required relationship. The results of the work allow predicting the saturation current for a GaInAs p-n junction with a given energy gap.
The effect of pretreatment of X12CrNiTi18-10 steel on surface characteristics as a result of laser hardening
Authors: Makhov N , Proskuryakov V , Rodionov I , Koshuro V , Fomin A , Borodina S 
Published: December 2019

Abstract
The results of studies of the effect of pretreatment of stainless chromium-nickel steel X12CrNiTi18-10 on the morphological characteristics and microhardness of the surface as a result of laser hardening are presented. It was established that with laser modification, a uniformly distributed surface microrelief is formed with a microhardness value of up to 12.58 ± 0.1 GPa.
A fair comparison of spectral properties of Slot and Hybrid plasmonic micro-ring resonators
Authors: Butt M A , Fomchenkov SA , Kazanskiy NL 
Published: December 2019

Abstract
In this work, we presented micro-ring resonator structures based on slot and hybrid plasmonic waveguides. The slot waveguide is formed by keeping a narrow air gap between two silicon strip waveguides. Whereas, the hybrid waveguide is composed of Metal-Air-Silicon structure, where the E-field is considerably enhanced in the narrow air gap. The transmission spectrum and E-field distribution of these structures are simulated using the finite element method (FEM). Micro-ring resonator based on hybrid plasmonic waveguide shows the best sensitivity of 333.3 nm/RIU. Whereas, slot waveguide based micro-ring resonator showed the best performance in Q-factor and the figure of merits.
Spectral Properties of Magneto-plasmonic Nanocomposite. Vertical Shift of Magneto-Optical Hysteresis Loop
Authors: Tomilin S V , Berzhansky V N , Shaposhnikov A N , Lyashko S D , Mikhailova T V , Tomilina O A 
Published: December 2019

Abstract
In present work the results about study of spectral features of the magneto-optical hysteresis loop (Faraday rotation) vertical shifting effect in the magneto-plasmonic nanocomposite Bi:YIG/Au(NP)/GGG are shown. It is shown that in the spectral range near localized plasmon-polariton resonance (LPPR) the magneto-optical hysteresis loop has a vertical shift (Faraday “delta”). The loop shifting at the left and right side of the LPPR have a different sign and in the resonance the loop shifting become null. It is shown that the spectral locations of Faraday “delta” maxima are due to the width of the LPPR resonant line.
Evolution of photoemission properties on Cs/GaAs and GaAs(Cs,O) surfaces under thermal cycling
Authors: Khoroshilov V S , Kazantsev D M , Zhuravlev A G 
Published: December 2019

Abstract
The photoemission properties on Cs/GaAs and GaAs(Cs,O) surfaces prepared at room temperature were studied under thermal cycling. The evolution of electron affinity and escape probability to vacuum was measured using photoemission quantum yield spectroscopy for the surfaces with various Cs-O overlayer compositions. It was found that an increase in the oxygen exposure led to the improvement in the thermal stability of electron affinity.
Excitation of unidirectionally propagating plasmon in the periodic graphene structure
Authors: Mashinsky K V , Popov V V , Fateev D V 
Published: December 2019

Abstract
The transformation of normally incident electromagnetic wave into propagating plasmon in periodical graphene structure with double grating gate is theoretically investigated. The most effective transformation appears in case of excitation plasmon modes with the wavevectors quantized with structure period. Blocking the reflection and the transmission of electromagnetic wave through the graphene structure by metal back gate and Fabry-Perot resonator are used. We found the 72% transformation of the incident wave radiation power into the power of unidirectionally-travelling plasmon for 1 ps momentum relaxation time in graphene.
Numerical modelling of an error of manufacturing of ion-exchange waveguide for the tasks of quantum computations
Authors: Gerasimenko V S , Gerasimenko N D , Kiselev F D 
Published: December 2019

Abstract
This paper describes modeling of single-mode waveguide and 3dB directional coupler for integrated optical quantum circuits manufactured by ion-exchange process. We present results of diffusion ion exchange simulation for Na+ ↔ K+ in the R2O-Sn2O-SiO2 glass and optical elements modeling performed by the beam propagation method. There was demonstrated that the refractive index profile in the overlapping area of directional coupler can be calculated by summing two separate profiles, and error would not exceed 3%. We were able to minimize light propagation looses in the device with about 20 mm length. It was done by reducing interaction length to zero and adjusting width of the bend. After that fabrication tolerance of the device was looked. The overall transmittance of the proposed directional coupler was evaluated as 0.96
Dynamics of cluster structures in the near-surface layer of distilled water under laser excitation
Authors: Shostka V I , Shostka N V 
Published: December 2019

Abstract
We explore changes in the distilled water structure by optical methods in this work. The lack of rigorous ideas about the structure of water and its organization at the molecular level hinders the development of methods not only for quantitative analysis, but also for qualitative assessment of the structure of water. Optical methods of studying changes in the structure of water are used in present work, since it is a disordered fluid whose hydrogen bonds are short-lived. The mechanism for the formation of cluster structures near the surface of a water drop is proposed. It is shown that water has unique properties associated with the presence of order in its various states due to the cooperative effect of structural and dynamic changes in a heterogeneous hydrogen bond network.
Growth and spectroscopy of orthorombic Yb:KY(MoO4)2 laser crystal with a layered structure
Authors: Volokitina A , Loiko P , Serres J M , Mateos X , Kuleshov N , Trifonov V , Pavlyuk A 
Published: December 2019

Abstract
We report on the growth, structure, vibronic and spectroscopic properties of novel Yb3+-doped orthorhombic potassium yttrium double molybdate crystal, Yb:KY(MoO4)2. The layered structure of this material determines a strong polarization-anisotropy of absorption and emission bands of Yb3+ ions. The maximum stimulated-emission cross-section is 3.7×10-20 cm2 at ∼1.01 μm for light polarization E ∥ b and the lifetime of the 2F5/2 state is 0.46 ms. Naturally cleaved Yb:KY(MoO4)2 plates are suitable for microchip lasers at ∼1 μm.
Two-photon photoluminescence of a thin-film hybrid material based on CdSe(core)/ZnS/CdS/ZnS(multishell) semiconductor quantum dots
Authors: Dyagileva D V , Krivenkov V A , Samokhvalov P S , Nabiev I , Rakovich Yu P 
Published: December 2019

Abstract
Semiconductor quantum dots (QDs) are widely used as components of hybrid materials for development of efficient light emitters and convertors. Their unique nonlinear optical properties, such as two-photon absorption and two-photon photoluminescence from biexcitons, make them promising materials for photovoltaic and optoelectronic applications. In this study, thin-film hybrid materials based on the CdSe(core)/ZnS/CdS/ZnS(multishell) QDs have been fabricated, and the two-photon photoluminescence (PL) from the generated biexcitons have been studied. The results show that fabricated thin-film hybrid materials based on the QDs are efficient fluorophores in the one- and two-photon PL regimes for applications in optoelectronics and biosensing.
Numerical modeling of the spectral and spatial distribution of the electromagnetic modes in a tunable microcavity for investigation of the light-matter interaction
Authors: Lednev M A , Dovzhenko D S , Rakovich Yu P , Nabiev I 
Published: December 2019

Abstract
The light-matter interaction between a molecule and confined electromagnetic field is of great interest because it allows tuning the energy states and the spectral properties of the coupled matter. This effect offers a great number of applications in many areas, such as nonlinear physics, biosensing and lasing. The most widely used approach to achieve light-matter coupling is to place an ensemble of molecules inside an optical cavity. In order to maximize the effects of interaction, it is necessary to model the spectral properties of the cavity in order to find the optimal parameters for the experiments. In this study, the model for the numerical calculation of the spectral and spatial properties of electromagnetic modes of a tunable microcavity was developed and a mode analysis has been performed. The cavity transmission spectra and the electromagnetic field distribution were investigated. The results showed a good agreement with the experimental data obtained earlier.
Synthesis of SiO2@Ag core-shell photonic crystals for SERS application
Authors: Ashurov M S , Eremina E A , Abdusatorov B A , Klimonsky S O 
Published: December 2019

Abstract
Core-shell SiO2@Ag composite spheres with dense, complete and nanoscaled silver shell were prepared by using facile chemical reduction method. Self-assembly of the composite microspheres into 3D photonic crystals (PhCs) was carried out using the vertical deposition method. The core-shell PhCs composites were characterized by X-ray powder diffraction (XRD), scanning electron microscopy (SEM), UV-Vis spectroscopy and energy dispersive X-ray spectroscopy (EDX). The results of amplification of Raman scattering by these composite substrates are presented.