bluuebunny/crossref_metadata_2025_split huggingface dataset:
The study of voltage loss reasons in GaAs solar cells with embedded InGaAs quantum dots
Authors: Salii R A , Evstropov V V , Mintairov S A , Mintairov M A , Nakhimovich M V , Shvarts M Z , Kalyuzhnyy N A 
Published: December 2020

Abstract
In the work the effect of the number of In0.8Ga0.2As stacked quantum dots (QDs) embedded in a single-junction GaAs solar cell (SC) on its photoelectric characteristics has been studied. A series of GaAs SC structures, which differed by a number of embedded QD layers, were grown using metalorganic vapor phase epitaxy. By analyzing the electroluminescence spectra and the current–voltage characteristics of the obtained structures the main reason for the voltage loss in SC with QDs has been established which is an increase in recombination through the QD levels with an increase the number of QD layers.
Application of selective contacts for study of silicon surface degradation
Authors: Kudryashov D A , Maksimova A A , Baranov A I , Uvarov A V , Morozov I A , Gudovskikh A S 
Published: December 2020

Abstract
In this work an application of selective contacts p-Si/MoOx for evaluation of silicon surface degradation is shown. Using a method of I-V measurements the effect of silicon surface degradation during SiO2 magnetron deposition was demonstrated.
Lateral mode behaviour in diode lasers based on coupled ridges
Authors: Epanchinova A A , Payusov A S , Kornyshov G O , Serin A A , Kulagina M M , Zhukov A E , Gordeev N Yu , Maximov M V 
Published: December 2020

Abstract
We present a study of diode lasers with two identical optically coupled ridges. Two coupled ridges were made gradually divergent to a distance of 50 μm which allowed creating three electrically isolated sections within a single laser. We carried out numerical simulations of the electromagnetic modes in the coupled ridge waveguide and calculated far-field patterns for each mode. The results are in good agreement with the experimental data. We have found that current spreading provided unwanted optical gain in the active region in between ridges and dramatically changed the structure of the lasing modes. The obtained numerical and experimental results can be used to design twin-ridge diode lasers able to operate in mode-locking regimes.
A polarization-independent highly sensitive hybrid plasmonic waveguide structure
Authors: Butt M A , Fomchenkov S A 
Published: December 2020

Abstract
In this paper, we proposed a novel design of a polarization-independent hybrid plasmonic waveguide. The transverse magnetic (TM) hybrid mode is confined in the low index material sandwiched between the silicon core and top gold layer whereas the transverse electric (TE) hybrid mode is supported in a narrow air gap on both sides between the silicon core and a gold layer. For sensing applications, two vital parameters such as the sensitivity of the hybrid mode (S

mode
) and evanescent field ratio (EFR) are studied which depends on the geometric parameters of the waveguide. The geometric parameters of the waveguide are optimized using the finite element method. The highest S

mode
and EFR for both polarizations is greater than 0.91 and 0.6, respectively. This study shows that polarization-independent highly sensitive refractive index sensors or evanescent field absorption gas sensors can be realized by utilizing the proposed hybrid plasmonic waveguide design.
Radially Polarized Beams Forming Using Phase-Compensated Sectorial Dichroic Plates
Authors: Degtyarev S A , Karpeev S V , Fomchenkov S A 
Published: December 2020

Abstract
We propose to create radially polarized beam using 8-sectorial polarizer. The manufacturing technology of such elements is based on axially symmetric discretization of the required polarization and phase distributions. This representation leads to optical elements in the form of sector plates Simulation is provided with Comsol multiphysics software. We show that the plate can create the radially polarized beam with the vortex phase.
Manufacture of optical ceramics based on two solid solutions of the AgBr – (TlBr0.46I0.54) system
Authors: Zhukova L V , Lvov A E , Salimgareev D D , Yuzhakova A A , Belousov D A , Korsakov M S 
Published: December 2020

Abstract
This work is devoted to the synthesis and the optical properties study of a new multicomponent heterophase ceramic based on two solid solutions of the AgBr – (TlBr0.46I0.54) system. Ceramics are transparent in the infrared range from 1.0 to 40.0 ÷ 50.0 μm, non-hygroscopic, are photo- and radiation-resistant, flexible, as a result of which various optical products are made from it by hot embossing.
Performance of an optical non-volatile Ge2Sb2Te5-based storage element
Authors: Makarov M , Sapegin A , Barabanenkov M , Italyantsev A 
Published: December 2020

Abstract
Considerable growth in data exchange leads to enhanced requirements for computing, storage, and transmitting devices. Promising solutions to this challenge can be found in the use of phase-change materials. This paper is devoted to evaluating the frequency response of a non-volatile storage element with optical recording and readout. The evaluation shows that it is possible to reduce the device’s operating cycle time and improve its performance.
The Simulation of Gold Nanoparticle in a TiO2 Matrix Absorption and Reflection Spectra
Authors: Enns Y , Kondrateva A , Mishin M 
Published: December 2020

Abstract
In this work results of a nanocomposite structures optical parameters modelling are presented. The variable parameters were: shape of nanoinclusions, matrix width and incident radiation angle. The quasiperiodic nanocomposite structures consisting of a titanium dioxide matrix and gold nanoparticles were simulated. A spectral analysis of these structures showed the nonlinear nature of the absorption and reflection spectra and influence of the nanoparticles shape on it.
Effect of tin doping on optical properties of ZnO thin films grown on glass substrate
Authors: Volkova M G , Storozhenko V Yu , Petrov V V , Bayan E M 
Published: December 2020

Abstract
The optical properties of synthesized zinc oxide films doped with tin in different concentrations (0-5 mol.%) were studied. X-ray diffraction revealed that the main phase of the obtained films is ZnO (wurzite). According to SEM data, the film consists of nanocrystallites, which are 10-20 nm in size. It was shown that the introduction of 0.5 mol.% tin ions leads to an increasing in the absorption of wavelengths (in the range of 300-370 nm) and a slight narrowing of the band gap.
Study of silicon nitride O-ring resonator for gas-sensing applications
Authors: Elmanova A , An P , Kovalyuk V , Golikov A , Elmanov I , Goltsman G 
Published: December 2020

Abstract
In this work, we experimentally studied the influence of different gaseous surroundings on silicon nitride O-ring resonator transmission. We compared the obtained results with numerical calculations and theoretical analysis and found a good agreement between them. Our results have a great potential for gas sensing applications, where a compact footprint and high efficiency are desired simultaneously.
Experimental new ultra-high-speed all-optical coherent streak-camera
Authors: Bagayev S N , Averchenko V A , Chekhonin I A , Chekhonin M A , Balmaev I M , Mekhov I B 
Published: December 2020

Abstract
We have experimentally studied for the first time a new operation principle of the all-optical coherent streak-camera (Rabi deflector). In the experiment, we observed an effect of significant dynamical angular deflection of a pulse of semiconductor laser during the resonant pumping of the D2 line (780.24 nm) of 87Rb vapor in the range of diffraction angles ϕ = ± 5.45°. We propose to use the Rabi deflector as an energy efficient shaper of classical and single-photon wave packets. We analyze a possibility of the Rabi deflector operation in quantum systems with feedback.
Realizing topological corner states in two-dimensional Su-Schrieffer-Heeger model with next-nearest neighbor couplings
Authors: Ivanova P A , Olekhno N A , Kachin V I , Zhirihin D V , Seregin P S , Gorlach M A 
Published: December 2020

Abstract
In the present work, we consider a two-dimensional Su-Schrieffer-Heeger model with alternating positive tunneling couplings between the neighboring sites. We show that introducing next-nearest neighbor couplings results in the emergence of topological corner states for some values of the corresponding tunneling coupling. Our work resolves the contradiction that arose when such corner states absent in the original two-dimensional Su-Schrieffer-Heeger model were observed experimentally in its photonic realization based on the array of cylindrical microwave resonators.
Electronic transport features of MoTe2 caused by quenching
Authors: Marchenkov V V , Domozhirova A N , Naumov S V , Podgornykh S M , Chistyakov V V , Korenistov P S , Huang J C A 
Published: December 2020

Abstract
The electro- and magnetoresistivity of MoTe2 single crystals before and after quenching were measured at temperatures from 1.8 to 300 K and in magnetic fields of up to 9 T. It was demonstrated that quenching can lead to strong changes in values of the electro-and magneresistivity studied as well as in their temperature and field dependences. The peculiarities of these electronic transport characteristics changes were studied in detail.
Size effect in the kinetic properties in “sized” films of Bi2Se3 topological insulator
Authors: Chistyakov V V , Domozhirova A N , Huang J C A , Marchenkov V V 
Published: December 2020

Abstract
The Hall resistivity and magnetoresistivity of topological insulator Bi2Se3 thin films with a thickness from 30 nm to 75 nm in the temperature range from 4.2 to 80 K and magnetic fields of up to 10 T were measured. A size effect in the kinetic properties of bismuth selenide films was studied, i.e. a dependence of the Hall coefficient and magnetoconductivity of film dimensions. It was suggested that a similar size effect should be observed in other kinetic electronic properties, both of topological insulators and topological semimetals.
Simulation of induction chemical-thermal treatment of titanium disks in a massive refractory container
Authors: Voyko A , Fomina M 
Published: December 2020

Abstract
The results of numerical simulation of chemical-thermal treatment, namely, heating of a massive metal container with a working medium and a small-sized titanium disk sample, are presented. To study the heating kinetics of this system, the effect of the parameters of chemical-thermal treatment, in particular the inductor current from 3.4 to 8 kA at a frequency of 90 kHz, was determined.
Choosing the electrode material for the fast electrochemical actuator
Authors: Shlepakov P S , Uvarov I V , Naumov V V , Svetovoy V B 
Published: December 2020

Abstract
Electrochemical actuators are promising candidates for implementation in various microfluidic systems, but they suffer from a very long response time due to slow gas recombination. Water electrolysis performed by short voltage pulses of alternating polarity (AP) reduces the response time by several orders of magnitude. This process, however, results in a fast degradation of electrodes. It is important to find a material, which is able to withstand the AP operation without significant degradation. In this work the electrodes made of six metals are fabricated and tested. The current flowing through the cell, the threshold voltage for the explosive operation, and the wear of the electrodes are analyzed and compared.
Rotator for electromagnetic emission based on conformal mapping
Authors: Pesnyakov V , Vozianova A , Khodzitsky M. 
Published: December 2020

Abstract
Using conformal mapping it is proposed a device, which demonstrates the illusion effect. Emission from the current sheet source placed on the X-axis centered at the origin is almost fully rotated at an angle of 90 degrees. As a result, the observer would detect that the current sheet source placed on Y-axis.
Creation and study of liquid nanojunction using SPM-base technology
Authors: Zhukov M V , Lukashenko S Yu , Sapozhnikov I D , Golubok A O 
Published: December 2020

Abstract
The ion conductivity of the meniscus-like liquid nanojunction has been studied. For creation and stabilization of liquid nanojunction the scanning probe microscope with glass nanopipette tip has been used. Current to voltage characteristics of liquid nanojunctions in dependence of the concentration of ions in electrolyte and the immersion depth of the pipette into the liquid surface have been measured. In dependence of the experimental parameters both linear and nonlinear current to voltage dependencies and also periodic current oscillations have been observed.
Deposition of a titanium coating on a steel base by contact welding and study of the resulting layered system structure
Authors: Egorov I , Fomin A 
Published: December 2020

Abstract
The paper describes a method for the deposition of a titanium coating on the base of steel grade Cr12MoV for the subsequent modification of the layered system. The resistance welding parameters required for the formation of the “steel – titanium” structure with an increased hardness of 300–800 HV were established.
A theory of flexural modes in graphene
Authors: Raikov I. O. , Conyuh D. A. , Ipatov A. N. , Parshin D. A. 
Published: December 2020

Abstract
We present a theory of flexural modes in graphene. The theory is based on the idea of negative springs in the second coordination circle between next nearest neighbours. As a result these negative springs change the dispersion law of vibrational modes in graphene from phonon-like linear dispersion ω
∝
q to a flexural kind dispersion ω
∝
q
2, when the elastic modulus of the lattice goes to zero. At this point positive springs of the first shell are completely compensated by the negative springs which are 1/6 of the positive springs. Phonons cannot propagate through such a soft lattice with zero Young modulus and sound velocities, but flexural modes can.
Morphology and redispersibility of silver nanoparticles prepared by chemical reduction
Authors: Lukhmyrina T S , Shestakov M S , Shvidchenko A V , Matveev B A 
Published: December 2020

Abstract
In the present work we fabricated and investigated colloidal Ag nanoparticles (NPs). The NPs were synthesized by the chemical reduction method of Ag2SO4 using NaBH4 in the presence of different surfactants. Morphological properties of synthesized colloidal Ag-NPs were studied by ultraviolet-visible (UV-vis) spectroscopy and dynamic light scattering (DLS). Average NP size varied in the range from 3 to 15 nm. Redispersibility of dried NPs with various stabilizers was also investigated and recovered that fish oil is effective stabilizer.
Impact of the piezoelectric response of carbon nanotubes on their memristive properties
Authors: Il’ina M V , Guryanov A V , Osotova O I , Il’in O I , Rudyk N N , Ageev O A 
Published: December 2020

Abstract
The experimental studies of the piezoelectric response of aligned carbon nanotubes (CNT) with different geometric parameters are presented. It is shown that the magnitude of the piezoelectric response increases with decreasing diameter and length of the CNT. It is established that CNT memristive properties improve with an increase of piezoelectric response. The results can be used in the development and creation of energy-efficient storage devices and nanogenerators.
Explaining successful and failed investments in U.S. carbon capture and storage using empirical and expert assessments
Authors: Abdulla Ahmed , Hanna Ryan , Schell Kristen R , Babacan Oytun , Victor David G 
Published: December 2020

Abstract
Most studies of deep decarbonization find that a diverse portfolio of low-carbon energy technologies will be required, including carbon capture and storage (CCS) that mitigates emissions from fossil fuel power plants and industrial sources. While many projects essential to commercializing the technology have been proposed, most (>80%) end in failure. Here we analyze the full universe of CCS projects attempted in the U.S. that have sufficient documentation (N=39)—the largest sample ever studied systematically. We quantify 12 project attributes that the literature has identified as possible determinants of project outcome. In addition to costs and technological readiness, which prior research has emphasized, we develop metrics for attributes that are widely thought to be important yet have eluded systematic measurement, such as the credibility of project revenues and policy incentives, and the role of regulatory complexity and public opposition. We build three models—two statistical and one derived through the elicitation of expert judgment—to evaluate the relative influence of these 12 attributes in explaining project outcome. Across models, we find the credibility of revenues and incentives to be among the most important attributes, along with capital cost and technological readiness. We therefore develop and elicit experts’ judgment of 14 types of policy incentives that could alter these attributes and improve the prospects for investment in CCS. Knowing which attributes have been most responsible for past successes and failures allows developers to avoid past mistakes and identify clusters of near-term CCS projects that are more likely to succeed.
Optimization of Binding, Washing and Elution Buffer for Development of DNA Isolation Kit
Authors: Weng Chong Li , Yazid Hafiz , Appalasamy Suganthi , Geng Boon Jia , Nasir Wan Mohd Nazdrol Wan Mohd , Muhammad Nik Maheran Nik , Iman Abd Hamid Mar , Kumaran Jayaraj Vijaya 
Published: December 2020

Abstract
DNA isolation is one of the most crucial part in DNA analysis and is reflected by the abundance of ready-to-use DNA isolation kits available in the market. However, the chaotropic salts used in conventional kits during the binding step has been known to inhibit the downstream process of PCR and deteriorate when exposed to air. This study aims to design a better and faster DNA isolation process with better DNA isolation performance to replace the conventional one. This study aims to replace the chaotropic salt in binding buffer with organic acids or salt and improve the buffer used during the wash step. Sodium perchlorate and several other salts and acids were chosen as candidates for the binding buffer. Simultaneously, 10Mm NaCl and 10Mm Tris-Cl with varying concentrations of organic solvents were selected as candidates for the wash buffer. The performance of the selected buffers was then compared to the readily available commercial kit. Organic acid B was among the best candidates for binding buffer with 81.91% and 83.20% recovery rates. For wash buffer, it was observed that the DNA recovery increases with an increasing organic solvent concentration in 10Mm NaCl and 10Mm Tris-Cl. Wash buffer with 90% organic solvent shows the best compromise of DNA yield and purity compared to 70%, 80%, and 100% organic solvent concentration in 10Mm NaCl and 10Mm Tris-Cl. A combination of organic acid B in binding buffer and 90% organic solvent A in wash buffer were tested against a commercial DNA extraction kit. The combination of organic acid B and 90% organic solvent yielded 72.81 ng/ul compared to 28.46 ng/ul by the commercial kit. The combination of the binding buffer organic acid B and 90% organic solvent in 10Mm NaCl and 10Mm Tris-Cl can replace the current commercial kits without the problems posed by the presence of chaotropic salt.
Evaluation of long-term storage effects on buccal cell DNA from untreated cards for STR profiling
Authors: Hakim Hashom Mohd , Lalung Japareng , Khan Hussein Omar , Ismail Siti Afifah , Aziz Mohd Yusmaidie , Ishak Ahmad Razali , Safuan Sabreena , Rasudin Nur Syahmina , Chambers Geoffrey Keith , Edinur Hisham Atan 
Published: December 2020

Abstract
The success of DNA profiling using long-term stored samples depends on the amount and quality of their recovered DNA templates. Physical and biochemical factors such as microbial activity, humidity and temperature contribute to DNA degradation. In this study, we used genomic DNA extracted from buccal cell samples that were stored for more than 4 years on Bode Buccal DNA Collector™ cards (Bode Technology, Virginia, USA) for typing 27 and 24 short tandem repeat (STR) loci using Powerplex® Fusion 6C system (Promega Corporation, Madison, USA) and Globalfiler™ Express kit (Thermo Fisher Scientific, USA), respectively. Our results demonstrated that the Buccal DNA Collector can be used as a collection medium for buccal swab samples that are not immediately analyzed or those that need to be retrospectively analyzed. There is a sign of DNA degradation which might well be expected because buccal cell samples were deposited on untreated filter paper and have been stored for a long period (> four years) at room temperature. However, STR allele calls were obtained from most of the buccal cell samples, especially when typed using the Powerplex® Fusion 6C system kit.
Optimal Hypochlorite Bleaching Duration for Sesbania grandiflora Pulp
Authors: Xian Liew Jing , Geng Boon Jia , Nadhari Wan Noor Aidawati Wan , Peng Leh Cheu 
Published: December 2020

Abstract

Sesbania grandiflora is a fast growing species with 3 to 4 years of harvest rotation. Meanwhile, high cellulose content of the plant has made it a potential commercial pulpwood in Malaysia however the information is limited. Bleaching is an important process in pulp and paper manufacturing. Sodium hypochlorite was commonly used as the bleaching agent due to its strong oxidising bleaching in brightening the pulp. To reveal potential of Sesbania grandiflora as pulpwood, this research was carried out to determine the optimal duration by bleaching the Sesbania grandiflora with sodium hypochlorite. Sesbania pulp was treated with 5.00wt% of sodium hypochlorite solution in the water bath under the temperatures of 50°C. Three bleaching durations were taken: 20mins, 40mins and 60mins. The procedures of laboratory handsheets making and testing were conducted according to modified TAPPI standard. The results proved that 60mins was the optimal bleaching duration which showed the highest brightness percentage and the least lignin content. The reduction of lignin content also the kappa number had contributed to the brightness of the pulp. However, the overall strength properties of the Sesbania handsheets such as bursting test, tearing test and folding endurance test were decreased due to the fibre degradation when bleaching. The optical properties and strength properties of bleached handsheets showed significantly difference as compared to the unbleached handsheets and the differences become obvious as the bleaching duration increase.