bluuebunny/crossref_metadata_2025_split huggingface dataset:
Features of the MBE growth of nanowires with quantum dots on the silicon surface
Authors: Reznik R R , Kotlyar K P , Khrebtov A I , Cirlin G E 
Published: December 2021

Abstract
The development of a new semiconductor element base is necessary to create a new generation of applications. At present time, the synthesis of high-quality hybrid nanostructures based on III-V quantum dots in the body of nanowires of a wide range of material systems is an urgent and important task. In work hybrid III-V nanostructures based on QDs in the body of NWs in GaP/GaAs and AlGaP/InGaP material systems were synthesized in on silicon substrates and their physical properties were investigated.
Effect of wet chemical treatment on the properties of GaAs FIB-modified surface
Authors: Shandyba N A , Chernenko N E , Zhityaeva J Y , Osotova O I , Eremenko M M , Balakirev S V , Solodovnik M S 
Published: December 2021

Abstract
We present the results of studies of the effect of wet chemical treatment on the properties of a GaAs surface modified by a gallium focused ion beam. Our studies based on results of AFM, KpAFM and Raman spectroscopy measurements have shown that, during wet chemical treatment, the damaged areas disappear completely in the case of low accelerating voltages and small doses of ions. At the same time, large accelerating voltages lead to the formation of extended damaged regions, the complete removal of which requires a longer treatment or additional processing.
Separation of AlN layers from silicon substrates by KOH etching
Authors: Shubina K Yu , Mokhov D V , Berezovskaya T N , Pirogov E V , Nashchekin A V , Sharofidinov Sh Sh , Mizerov A M 
Published: December 2021

Abstract
In this work, the AlN/Si(111) epitaxial structures grown consistently by plasma assisted molecular beam epitaxy (PA MBE) and hydride vapour phase epitaxy (HVPE) methods were studied. The PA MBE AlN buffer layers were synthesized via coalescence overgrowth of self-catalyzed AlN nanocolumns on Si(111) substrates and were used as templates for further HVPE growth of thick AlN layer. It was shown that described approaches can be used to obtain AlN layers with sufficiently smooth morphology. It was found that HVPE AlN inherited crystallographic polarity of the AlN layer grown by PA MBE. It was demonstrated that the etching of such AlN/Si(111) epitaxial structures results in partial separation of the AlN epilayers from the Si(111) substrate and allows to form suspended structures. Moreover, the avoidance of surface damage and backside overetching was achieved by use thin Cr film as surface protective coating and by increasing the layer thickness accordingly.
MBE growth of AlGaAs/Ge/AlGaAs core-shell nanowire
Authors: Terpitskiy A N , Ilkiv I V , Kotlyar K P , Kirilenko D A , Cirlin G E 
Published: December 2021

AbstractHeterostructured AlGaAs/Ge/AlGaAs core-multishell nanowires having hexagonal crystal structure were synthesized by molecular beam epitaxy. Formation of 2-3 nm Ge quantum well structure was demonstrated. Raman characterization revealed a 200 cm−1peak corresponded to hexagonal phases of germanium.
System for monitoring the parameters of overhead power lines
Authors: Listyuhin V A , Pecherskaya E A , Timokhina O A , Smogunov V V 
Published: December 2021

Abstract
The analysis of disturbances (accidents) on overhead power transmission lines and methods and means of the overhead power transmission lines parameters monitoring was carried out. It is shown that the most promising direction for ensuring the required indicators of the reliability of power supply is the development and implementation of information and measurement systems at the facilities of the power supply network complex. The structure of an intelligent information-measuring system for measuring parameters characterizing the state of wires, external factors influencing the state of power lines is proposed. The proposed decision support system will make it possible to promptly identify defective sections of overhead lines, increase the level of technological management of electrical networks.
The electromagnetic absorbers based nano - structured granular polymer-composites at gigahertz frequencies.
Authors: Savelev D , Grushevski E , Savinski N , Soloviev M , Turov V , Krenev V 
Published: December 2021

Abstract
The rapid increase in electromagnetic interference has received a serious attention from researchers who responded by producing a variety of radar absorbing materials especially at high gigahertz frequencies. Ongoing investigation is being carried out in order to find the best absorbing materials which can fulfill the requirements for smart absorbing materials which are lightweight, broad bandwidth absorption, stronger absorption etc. Therefore, this article introduces the electromagnetic wave absorption mechanisms and then reveals and reviews those parameters that enhance the absorption performance.
Design and simulation of the compact MEMS energy harvester based on aluminium nitride
Authors: Shlepakov P S , Uvarov I V 
Published: December 2021

Abstract
A device for converting the energy of mechanical vibrations to electricity by the piezoelectric effect is presented. A main part of the transducer is a multilayer cantilever with the inertial mass at the tip. A piezoelectric layer is made of 0.5 μm thick aluminum nitride. A feature of the device is the compact lateral size of about 1 mm, which is 10 times smaller in comparison with conventional harvesters. The device is fully compatible with microelectromechanical systems (MEMS) technology. The cantilever has a natural frequency of 45-160 Hz, depending on the size and inertial mass. The transducer generates the output voltage of 0.35 V, which is high enough for rectifying by the diode bridge. The output power of 2.7 nW is relatively low due to the small size. Nevertheless, the figure of merit is higher than that for conventional AlN-based energy harvesters.
High-performance inline RF MEMS switch for application in 5G mobile networks
Authors: Tkachenko A V , Lysenko I E , Kovalev A V , Vertyanov D V 
Published: December 2021

Abstract
This article presents the results of the design and analysis of a radio-frequency switch made using microelectromechanical systems technology. The device is the capacitive switch with a hybrid type of contact, in which the movable electrode of the structure – the metal membrane is part of the microwave signal line of the coplanar waveguide. The switch design is characterized by a high capacitance ratio and low contact resistance. The zig-zag elastic suspension is used to reduce the value of the pull-down voltage – 2 V and the switching time ∼ 7 us. The central resonant frequency of the switch is 3.8 GHz. In this case, in the open state, the value of the insertion loss is not more than -0.2 dB and the isolation value in the close state is not less than -55 dB. The effective frequency range is the S-band, as well as the C-, X- and Ku-band, in which the isolation value is at least -30 dB. The presented inline RF MEMS switch is suitable for use in various types of ground and satellite communications, in particular for devices and systems of 5G mobile networks.
The use of digital data processing to improve the metrological characteristics of the rubidium frequency standard
Authors: Valov A P , Arinushkina K G , Davydov V V , Rud V Yu 
Published: December 2021

Abstract
The necessity of improving the metrological characteristics of a quantum frequency standard when determining the coordinates of an object on the Earth’s surface or long-term transmission of large amounts of data in satellite communication systems is substantiated. A new algorithm for digital processing of optical signals in the frequency standard is proposed. The results of experimental studies of the metrological characteristics of a quantum frequency standard based on rubidium atoms - 87 are presented
Surface reconstruction post-processing method for 3D- scanned objects
Authors: Badillo P D , Parfenov V A , Shchegoleva N L 
Published: December 2021

Abstract
3D scanning is widely used in multiple applications to obtain high precision / non-destructive documentation of real-life objects, which is especially important in Cultural Heritage (CH) preservation. However, some issues (in particular missing parts which are commonly known as “holes”) affect the accuracy of the obtained 3D model after the scanning procedure and requires time-consuming post-processing procedures, which include manual editing by highly-trained personnel. In this article an automatic method to reconstruct the obtained surface of 3D models is proposed, improving previously obtained results for high-density point clouds.
Numerical modelling of non-planar GaN LED with CNT top contact
Authors: Raudik S A , Mitin D M , Vorobyev A A , Mozharov A M , Nasibulin A G , Mukhin I S 
Published: December 2021

Abstract
In this paper, the theoretical study of LED based on GaN NWs with carbon nanotubes (CNT) top contact has been presented. The main electrical and optical characteristics of LED have been numerically calculated. In a 0.5 x 0.5 mm NWs array, the Ohmic losses in CNTs were 2.7% with an operating current density of 50 A/cm2. It proves the possibility of using CNTs as transparent contact.
Spray deposited thin uniform NiO/Spiro-OMeTAD composite hole transport layer with top carbon nanotube electrode
Authors: Romashkin A V , Polikarpov Yu A , Silakov G O , Alexandrov E V 
Published: December 2021

Abstract
Thin Spiro-OMeTAD and NiO nanoparticles layers, as well as their composite layer was formed by layer-by-layer spray deposition as hole-transport layer (HTL), with followed carbon nanotubes (CNT) deposition to form Ti/TiO2/HTL/CNT structures. Layers’ uniformity was estimated by Raman intensity maps, AFM and current-voltage characteristics of the CNT layer and between CNT and Ti contacts. The possibility of formation of thin, less than 100 nm, pinhole-free uniform composite NiO/Spiro-OMeTAD layer by spray-deposition was shown, which manifests itself as continuous HTL even after top CNT layer deposition.
Laser treatment of ITO thin films with Carbon Nanotubes for Liquid Crystal Devices
Authors: Toikka A S 
Published: December 2021

Abstract
In this paper, the influence of laser ablation on the refractive properties of indium tin oxides (ITO) thin films with deposited single-wall Carbon Nanotubes (CNTs) was considered. Sputtering of CNTs was preliminary based on the laser-oriented method with application of the external electric field. The laser ablation of ITO-CNTs coatings allows changing the electric, optical and mechanical properties dramatically. Moreover, this technical operation permit to switch the topology of the surface, thus it leads to the conversion of the refractive index. The possibility of index-matching due to the laser treatment contributes to the expansion of the technical capabilities of LC devices.
Radiofrequency ablation of biological tissue and determination of the moment of achievement of the transmural effect: the influence of applied power on tissue resistance
Authors: Antipenko V V , Pecherskaya E A , Antipenko S A , Timokhina O A , Artamonov D V , Levin A I 
Published: December 2021

Abstract
Radiofrequency ablation (RFA) is used to treat both congenital and acquired heart diseases, including arrhythmias of various types. In this work, experimental studies are carried out on biological tissues under the influence of the applied power on the tissue. Based on the experiments carried out, it was concluded that the effectiveness of the effect on biological tissue and the quality of the result obtained clearly depend on the correct choice of power applied to the treated tissue.
Using of «bubble sensors» to control the quality of sequencing by the Illumina / Solexa method
Authors: Reznik V S , Kruglov V A , Davydov V V 
Published: December 2021

Abstract
In the modern world, sequencing is an integral part of medicine, biology and other scientific fields. The Illimina / Solexa method is a new generation method and relates to methods of mass parallel sequencing. One of the features of using this method is the sequential pumping of various chemicals through the flow cell in which the reaction occurs. For uniformity and high quality of DNA sequencing, it is necessary that the amount of gas in liquids be minimized. Because many it can adversely affect both during chemical reactions and at the stage of recording reaction results. This article will examine the sequencing system using the Illumina\Solexa method using bubble sensors. An algorithm was developed that periodically receives information from bubble sensors in a microfluidic tube. The information received is processed and allows at certain stages to report deviations from the normal conditions for sequencing. The experimental results are presented.
Identification of new silk-like protein from B. magister and development of functional materials based on it
Authors: Vronskaia A A , Mikushina A D , Eliseev I E 
Published: December 2021

Abstract
Tandem repeat proteins have composite structure and unique properties, which allow them to be used in multiple fields, such as soft photonics, drug delivery and textile industry. The recent discovery of squid ring teeth (SRT) proteins have expanded the existing repertoire of repetitive polypeptides. We chose previously unexplored squid B. magister for our research, isolated and analyzed a new protein forming its ring teeth and hooks, and amplified the corresponding gene. Finally, we used this new isolated SRT protein to fabricate transparent thin films and microspheres.
Combination of cytostatic chemotherapy with cisplatin and photodynamic therapy with Radachlorin reduced resistance of K562 and Hela cell lines
Authors: Klimenko V V , Shmakov S V , Knyazev N A , Verlov N A , Bogdanov An A , Terterov I N , Bogdanov A A 
Published: December 2021

Abstract
In this work were study combination effect of photodynamic therapy and cisplatin on the proliferation activity of K562 human leukemia cells and Hela cervical carcinoma cells. A decrease in cell viability and an increase the fraction of apoptotic cells for combination treatment compared with single therapy were observed. It has been shown that the G2/M-phase of cell cycle decreases compared with cisplatin treatment alone, which demonstrates an increase anti-proliferative effect. The combination index of the photodynamic therapy with Radachlorin and cisplatin was calculated and indicates a synergistic effect.
Passive decoy-state quantum key distribution with imperfect source
Authors: Gavrilovich A , Sych D , Kurochkin Y 
Published: December 2021

Abstract
Passive generation is a sophisticated way of state preparation in quantum key distribution (QKD) systems which is designed to exploit some internal physical process as a source of randomness. It can be profitable in a wide range of scenarios. However, the original analysis of the passive scheme implies an ideal interference which is almost impossible to assure in practice, therefore utilizing such method potentially compromises the security of the system. Here we develop a general technique to estimate decoy-state parameters for a passive protocol with an arbitrary experimental distribution of intensity. We compare this analysis with the original method and show that the proposed technique can provide higher key generation rates.
Formation of planar plasmon microstructures by dry aerosol printing
Authors: Khabarov K M , Nouraldeen M , Lizunova A A , Urazov M N , Ivanov V V 
Published: December 2021

Abstract
Optical properties and microstructure of samples formed by dry aerosol printing are studied. Silver nanoparticles flat layers of two types were formed on substrates surfaces and were investigated by a spectrophotometer, a scanning electron microscope, and a transmission electron microscope. It is shown that all microstructures support plasmon resonance on individual nanoparticles with the Q factor depending both on the width of the nanoparticles size distribution in the aerosol and on their tendency to agglomeration and aggregation.
Features of spectral analysis of nuclear magnetic resonance signal for express-control of hydrocarbon media
Authors: Makeev S S , Davydov V V , Rud V Yu 
Published: December 2021

Abstract
The article substantiates the need to study the structure of the nuclear magnetic resonance signal recorded using the modulation technique. For the stationary and current state, the characteristic features of recording a nuclear magnetic resonance (NMR) signal using the modulation method were determined. The influence of the properties of the medium on the features of recording the NMR signal has been determined. A new method is proposed for determining the contributions of absorption and dispersion signals to the recorded NMR signal. The features of the use of spectral analysis in the study of the NMR signal from hydrocarbon media have been determined.
Mass spectrometry analysis of C-dots produced by femtosecond laser irradiation of L-lysine film.
Authors: Astafiev A A , Gulin A A , Vasin A A , Shakhov A M , Zalessky A D , Osychenko A A , Nadtochenko V A 
Published: December 2021

Abstract
The production of carbon dots (C-dots) by femtosecond lasers within living cells and tissues is a novel approach, which has a great potency for intracellular bioimaging. An exact mechanism of fluorescent particles production as well as their composition still remains unknown. In this work we use L-lysine film as a model system to study the mechanism and the composition of C-dots produced by femtosecond laser irradiation investigated by time-of-flight secondary ion mass spectrometry (ToF-SIMS).
Simulating the spectral characteristics of reflection in planar porous structures with antireflection coatings ZnS/DyF3
Authors: Shishkina D , Shishkin I , Tishin P 
Published: December 2021

Abstract
This paper presents the results of modeling a planar multilayer structure with layers of porous silicon, ZnS and DyF3 coatings by the optical matrix method. It was shown that the optical matrix method, taking into account the model of porous silicon with a variable band gap, which takes into account the porosity gradient, allows us to approximate the course of the curve of the real experiment
Design and Simulation of the Two-Axis Micromachined Angular Rate Sensor
Authors: Lysenko I E , Denisenko M A , Isaeva A S 
Published: December 2021

Abstract
Micromechanical inertia sensors - accelerometers, gyroscopes, multisensor modules and systems based on them - are widely used in navigation, for compensation of other instruments (accelerometers, inclinometers) or stabilization (gyroscopes). The paper presents the designed construction of a MEMS angular rate sensor with two sensitivity axes, topology of gyroscope is presented; modal and static analysis is performed using ANSYS CAD; simulation results of micromechanical gyroscope operation under the action of angular velocities using VHDL-AMS are presented.
Determination of measurement fidelity for a superconducting photon-number resolving detector with micron-wide strips
Authors: Dryazgov M , Simonov N , Korneeva Yu. , Korneev A 
Published: December 2021

Abstract
We report a study of multiphoton detection fidelity (or accuracy) for sequential photon-number resolving detectors based on micron-wide superconducting strips. It was found that an increase in the width of the superconducting strips by a factor of 5 leads to an improvement in the measurement accuracy by more than a factor of 10.
Effect of encapsulation of fullerene in semiconducting zigzagcarbon nanotubes on optical and thermoelectric properties
Authors: Morozova E V , Timkaeva D A 
Published: December 2021

Abstract
We study the optical and thermoelectric properties of carbon nanotubes (CNTs) with encapsulated C60 fullerene molecules. Using ab-initio methods, we calculate optical and thermoelectric paramters for CNT with fullerenes periodically located inside the nanotube at different distances from each other. Dependencies of these parameters on fullerene concentration and diameter of CNT are analyzed.
Research of the structure and mechanical properties of gas-thermal coatings after induction heat treatment
Authors: Osipova E O , Markelova O A , Koshuro V A , Fomin A A 
Published: December 2021

Abstract
In this article the process of induction-thermal modification of titanium coatings formed by electroplasma spraying was considered. The influence of the inductor current on the temperature of processed samples was experimentally established. The research results showed that thermal treatment of the samples with titanium coatings at a temperature of 750–1200 °C and a duration of 300 s led to an increase in porosity from 56±2 to 61±1 % and in microhardness from 1035–1532 to 1825–1883 HV0,98, the sprayed layer thickness decreased from 320±30 to 114±15 μm as well. A change of nanoscale structural elements shape was also observed.
Al-CuOx multilayer nanostructures: formation features and thermal properties of new type of local heat source
Authors: Novoseltsev A I , Sorokina L I , Sysa A V , Ryazanov R M , Lebedev E A 
Published: December 2021

Abstract
In this work, multilayer nanostructured thermite materials are considered - a new type of local heat sources. Aluminium and copper oxide were chosen as components of the thermite mixture. The formation of multilayer structures was carried out on the surface of the substrate by the method of magnetron sputtering. The features of the deposition process as well as the energy properties of the formed materials have been investigated. The results obtained confirm the prospects of using this class of materials as local heat sources.
Application of the technology of induction chemical-thermal treatment to improve the physical and mechanical properties of tantalum
Authors: Voyko A , Gerasimov A , Fomina M , Koshuro V 
Published: December 2021

Abstract
The results of the chemical thermal treatment (CTT) of tantalum in a solid carbon- containing medium in the temperature range from 1000 to 1300 °C were presented. CTT consisted in heating a workpiece with a working medium in a container made of a refractory material. The induction heating method was used for heating. After strengthening treatment, tantalum samples were characterized by increased hardness, which grew from 140 to 1100 HV0.02.
Modeling of Harmonic Wave Propagation Through a Metasurface with Helmholtz Resonator Shaped Cells
Authors: Ismail A Y , Koo B Y 
Published: December 2021

Abstract
Harmonic wave propagation through a novel metasurface design is presented in this paper. The metasurface is formed by using the Helmholtz resonator as the cells shape design since such resonator has uniqueness and advantageous performances. The study is conducted both numerically using the finite element method and experimentally using specific measurements to validate the numerical results. Parametric studies of the selected variables are also conducted to obtain broader information on the performance. From the result, it is found that the new proposed metasurface design has the potential to be implemented in future engineering practices.