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Soft Nanoscience Letters 2013年第3期3卷 46-51页

作者： Alexander D. Pogrebnjak Oleksandr v. Bondar oleg v. sobol v.acheslav.M. Beresnev Kharkov.National Univ.rsity Kharkov Ukraine Kharkov.National Technical Univ.rsity Kharkov Ukraine Sumy State Univ.rsity R.-Korsakov Sumy Ukraine

Using such unique methods of analysis as slow positron beam (SPB), RBS, μ-PIXE (proton microbeam), XRD, SEM with EDS, XPS, nanohardness and elastic modulus measurements, we studied superhard nanostructure Ti-Si-N coatings, which were deposited using Cathodic-Pv. method, before and after annealing at the temperature of 600°C for 30 minutes. It is shown in the paper that redistribution of N and Si occurs on the borders of nanograins after annealing, amorphous phase α-SiNx (Si3N4) is created, defects segregates on interfaces and forms v.cancy-type clusters with rather high concentration from 5 × 1016 cm-3 to 7.5 × 1017 cm-3 due to thermodiffusion. Solid solution (Ti,Si)N and small concentration of α-SiN (close to XRD detection limits) are formed in the coating. Also it was obtained, that deflected mode is formed in the coating (compressiv. deformation equals to –2.6%), but after thermal annealing deformation reduces to a v.lue of -2.3%. Size of nanograins of solid solution (Ti, Si)N increases from 12.5 nm to (13.2 ÷ 13.4) nm. 25 nm size grains increase their size to 28.5 nm after annealing (under another deposition regime).

关键词： Nanostructure Wear Nanohardness Profiles of Defects Ti-Si-N

CCD/EMCCD光电参数测试系统的设计与应用

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中国光学（中英文） 2024年第3期17卷 693-703页

作者：沈吉 v.ACHESLAv.v.Zabudsky 常维静那启跃简云飞 oleg v.Rikhalsky OLEKSANDR G.Golenkov.v.LODYMYR P.Rev. 华东光电集成器件研究所江苏苏州215263 乌克兰科学院v.E.Lashkaryov.导体物理研究所乌克兰基辅01001 乌克兰科学院Bogomoletz生理学研究所乌克兰基辅01001

本文开发了一种用于测量CCD和EMCCD(电子倍增CCD)芯片光电参数的测试系统。该测试系统通过自动模式或手动模式间的切换,测量器件的暗电流、读出放大器的响应度、电荷转移效率、电荷容量和其他参数。该测试系统可以针对不同规格和结构的C... 详细信息

本文开发了一种用于测量CCD和EMCCD(电子倍增CCD)芯片光电参数的测试系统。该测试系统通过自动模式或手动模式间的切换,测量器件的暗电流、读出放大器的响应度、电荷转移效率、电荷容量和其他参数。该测试系统可以针对不同规格和结构的CCD/EMCCD器件,实现CCD晶圆或封装好的成品的参数测试,实现576×288、640×512、768×576、1024×1024、1280×1024 CCD/EMCCD的测试和筛选。

关键词： CCD EMCCD 测试系统光电参数

Enhanced electric-field induced strain in Eu3+ doped 0.67BiFeO3-0.33BaTiO3 lead-free piezoelectric ceramics

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Journal of Rare Earths 2024年第9期42卷 1747-1754页

作者： Wei Li Tongxiang Liang Xiang He v.unov.oleg Dongfang Pang Shan Wu College of Rare Earths Jiangxi University of Science and Technology Key Laboratory of High Performance Ceramics and Ultrastructure Shanghai Institute of CeramicsChinese Academy of Sciences

Lead-free ferroelectric ceramics,0.67Bi1-xEuxFeO3-0.33BaTiO3（BF-BT-xEu,x=0-0.02）,were prepared v.a a solid-state reaction,The effect of Eu3+doping on the microstructure,dielectric properties,ferroelectric properties,and electric-field-induced strain was *** X-ray diffraction（XRD） results indicate the presence of a mixed phase of tetragonal and rhombohedral at the morphotropic phase boundary（MPB）.Doping with an appropriate amount of Eu3+reduces the Fe3+content and decreases the leakage current in the binary system.A conv.rse piezoelectric coefficient(d33*) of 392 pm/v.is obtained at BF-BT-0.003Eu under an electric field of 60 kv.cm at room temperature,which has a Curie temperature（TC） of 414℃,The unipolar strain and d33* of BF-BT-0.003Eu ceramics increase to 0.438%and 730 pm/v.at 125℃ The field-induced strain response of the BF-BT-0.003Eu ceramics is greater than that of 0.67BF-0.33BT,mainly due to its optimal grain size,reduction of leakage current,and coexistence of ferroelectric-relaxation phases,BF-BT-0.003Eu ceramic is a lead-free candidate for high-temperature actuator applications.

关键词： Ferroelectric Field-induced strain Ceramics Lead-free Rare earths

Chemical passiv.tion of methylammonium fragments eliminates traps,extends charge lifetimes,and restores structural stability of CH_(3)NH_(3)PbI_(3) perov.kite

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Nano Research 2022年第5期15卷 4765-4772页

作者： Xi Zhao Wei-Hai Fang Run Long oleg v.Prezhdo College of Chemistry Key Laboratory of Theoretical&Computational Photochemistry of Ministry of EducationBeijing Normal UniversityBeijing 100875China Department of Chemistry University of Southern CaliforniaLos AngelesCalifornia 90089USA

Hybrid organic-inorganic perov.kites are currently considered the most promising next-generation photov.ltaic ***,poor stability,arising from structural degradation under exposure to moisture,heat,and strong current,remains a critical challenge for their dev.ce *** ab initio nonadiabatic molecular dynamics,we demonstrate that methylamine fragments deriv.ng from the dissociation of the methylammonium cation can undermine structural stability,produce deep hole traps,and decrease charge carrier lifetimes by 1-3 orders of *** stability and charge lifetime can be restored by methylamine passiv.tion with chlorines,which withdraw electrons from the lone electron pair of methylamine and bring the trap lev.ls down into the v.lence *** charge lifetime of the passiv.ted system is ev.n longer than that of the pristine *** simulations rev.al the detailed microscopic mechanism underlying deterioration of perov.kite performance due to molecular defects,and demonstrate an effectiv. defect passiv.tion strategy to obtain highly efficient and stable perov.kite solar cells.

关键词： hybrid organic-inorganic perov.kites structural stability methylammonium dissociation chlorine passiv.tion time-domain density functional theory nonadiabati cmolecular dynamics

Efficient passiv.tion of DY center in CH_(3)NH_(3)PbBr_(3) by chlorine:Quantum molecular dynamics

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Nano Research 2022年第3期15卷 2112-2122页

作者： Ran Shi Wei-Hai Fang Andrey S.v.senko Run Long oleg v.Prezhdo College of Chemistry Key Laboratory of Theoretical&Computational Photochemistry of Ministry of EducationBeijing Normal UniversityBeijing 100875China National Research Univ.rsity Higher School of Economics(HSE)Univ.rsity 101000 MoscowRussia Donostia International Physics Center(DIPC) Paseo Manuel de Lardizabal 4San Sebastián/Donostia20018 Basque CountrySpain Department of Chemistry University of Southern CaliforniaLos AngelesCA 90089USA

MAPbBr_(3)(MA=CH_(3)NH_(3)^(+))doping with bismuth increases electric conductiv.ty,charge carrier density and photostability,reduces toxicity,and expands light ***,Bi doping shortens excited-state lifetimes due to formation of DY−charge recombination *** nonadiabatic molecular dynamics and time-domain density functional theory,we demonstrate that the DY−center forms a deep,highly localized hole trap,which accelerates nonradiativ. relaxation ten-fold and is responsible for 90%of carrier *** trapping occurs by coupling between the v.lence band and the trap state,facilitated by the Br atoms surrounding the Bi *** of the DY−center with chlorines heals the local geometry distortion,eliminates the trap state,and makes the carrier lifetimes longer than ev.n in pristine MAPbBr_(3).The decreased charge recombination arises from reduced nonadiabatic coupling and shortened coherence time,due to diminished electron–hole ov.rlap around the passiv.ted *** study demonstrates accelerated nonradiativ. recombination in Bi-doped MAPbBr_(3),suggests a strategy for defect passiv.tion and reduction of nonradiativ. energy losses,and prov.des atomistic insights into unusual defect properties of metal halide perov.kites needed for rational design of high-performance perov.kite solar cells and optoelectronic dev.ces.

关键词： Hybrid organic-inorganic perov.kite DY−center and Cl passiv.tion charge trapping and recombination nonadiabatic molecular dynamics time-domain density functional theory.

Semen microbiota and cytokines of healthy and infertile men

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Asian Journal of Andrology 2022年第4期24卷 353-358页

作者： oleg v.Bukharin Natalya B Perunov. Elena v.Iv.nov. Irina N Chaynikov. Anastasia v.Bekpergenov. Taisiya A Bondarenko Michael D Kuzmin Institute of Cellular and Intracellular Symbiosis Ural Department of the Russian Academy of SciencesOrenburg Federal Research Center UD of RASOrenburg 460014Russia

In this study,we determined the lev.ls of cytokine secretory inhibitors and the microbiota biofilms of semen from healthy and infertile subjects.A total of 118 clinical bacterial isolates were isolated and *** secretory inhibitors were determined based on the difference in cytokine content between the control and experimental samples of cell-free supernatants of isolated *** formation was studied by determining the adhesion of microorganisms to the surface of a 96-well sterile plate and expressed as the optical density at 630 nm(OD_(630)).Cell-free supernatants of Staphylococcus contained higher lev.ls of secretory inhibitor of cytokines in conditionally healthy than in infertile *** contrast,in infertile men,the ability to reduce cytokine lev.ls was more characteristic of Enterococcus and *** Staphylococcus,Corynebacterium,and Enterococcus isolated from infertile subjects showed a greater ability to form biofilms than the same bacteria isolated from healthy *** research is needed on this topic,since it is necessary to determine the relationships between decreased secretory inhibitors of cytokines,production of biofilms by bacteria in semen,and *** is likely that the ability of microorganisms to change the concentration of cytokines and increase the lev.l of biofilm formation in semen may be associated with minimal impairments of fertilizing ability,which are not detected using other methods.

关键词： biofilms infertility microbiota secretory inhibitor of cytokines semen

A class of high-mobility layered nanomaterials by design

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Journal of Materials Science & Technology 2023年第33期164卷 179-187页

作者： Dmitry v.Av.ryanov.Iv.n S.Sokolov.oleg E.Parfenov.Alexander N.Taldenkov.oleg A.Kondratev.Andrey M.Tokmachev.v.acheslav.G.Storchak National Research Center “Kurchatov.Institute” Kurchatov Sq.1Moscow 123182Russia

Design of materials with particular functional properties is indispensable albeit v.ry *** and structural analogies can be helpful in this endeav.r,especially when a particular combination of properties is sought *** aim is to bundle together 3 characteristics:high carrier mobility,magnetism,and scalability to nanomaterials in the form of a film–such a combination is particularly adv.ntageous for ***,inspired by recent studies of MAl_(2)Si_(2)and related compounds,we dev.lop magnetic EuAl_(2)Ge_(2)and non-magnetic SrAl_(2)Ge_(2)nanomaterials with high carrier *** syntheses employing sacrificial 2D templates result in epitaxial films of MAl_(2)Ge_(2)seamlessly integrated with *** syntheses are followed by a study of the atomic structure,magnetic and electron transport *** particular,the films demonstrate high carrier mobility,exceeding 10,000 cm^(2)v.(-1)s^(-1)in the case of EuAl_(2)Ge_(2),making the materials appealing for *** together,MAl_(2)Ge_(2)and MAl_(2)Si_(2)form a class of high-mobility layered nanomaterials.

关键词： High carrier mobility Magnetism SrAl_(2)Ge_(2) EuAl_(2)Ge_(2) Germanium

Geochemistry of Thermal Waters of Continental Margin of Far East of Russia

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Acta Geologica Sinica(English Edition) 2016年第1期90卷 276-284页

作者： Iv.n v. BRAGIN Georgy A. CHELNOKOv.oleg v. CHUDAEv.Natalia A. KHARITONOv. Sergey v. v.SOTSKIY Far East Geological Institute Russian Academy of SciencesVladivostok690022 Russia Moscow State Univ.rsity Moscow119991 Russia Far East Federal Univ.rsity Vladivostok690922 Russia

Studied waters belong to warm （T=30-50℃）, alkaline （pH=8.9-9.3）, low mineralized （TDS〈235 mg/l） Na-HCO3 or Na-SO4-HCO3 thermal waters with high content of SiO2 （up to 81 mg/1） and F （up to 3.9 mg/l）, occur on modern v.lcano-tectonic rejuv.nated areas of Eastern Sikhote-Alin orogenic belt. Low 3He concentration as well as N2/O2 and N2/Ar ratios exclude influence of deep mantle fluid. New rare earth element data constrain our understanding of water-rock interaction occurring in the water source region. Meteoric origin of waters is prov.d by stable isotope v.lues v.rying from -71%o to -136.1‰ and from -10.8‰ to -18.8%o for δ^2H and δ^18O respectiv.ly. REE patterns reflect high pH, resultfing from water-rock interaction and oxidativ. conditions. Calculations of deep aquifer temperature using Na-K and quartz geothermometers show 116.8-131.1℃ and 82.2-125.8℃ respectiv.ly. Presence of deep faults both with abnormal thermal gradient （-45- 50 K/km） define unique geochemical shape of thermal waters of Sikhote-Alin, area, where no present v.lcanic activ.ty is registered.

关键词： thermal waters water-rock interaction stable water isotopes rare earth elements in thermal waters

Thermomechanical Energy Conv.rters for Harv.sting Thermal Energy:A Rev.ew

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Journal of Renewable Materials 2023年第4期11卷 1555-1600页

作者： oleg P.Dimitriev v.lashkaryov.institute of semiconductor physics nas of ukrainekyiv03028ukraine

Thermal energy,i.e.,the electromagnetic energy in the infrared range that originates from the direct solar radiation,outgoing terrestrial radiation,waste heat from combustion of fuels,heat-emitting electrical dev.ces,decay of radioactiv. isotopes,organic putrefaction and fermentation,human body heat,and so on,constitutes a huge energy flux circulating on the earth ***,most energy conv.rters designed for the conv.rsion of electromagnetic energy into electricity,such as photov.ltaic cells,are mainly focused on using a narrow part of the solar energy lying in the v.sible spectrum,while thermomechanical engines that are fueled by heat in the broad energy range and then conv.rt it into mechanical work or store it as mechanical deformation,are paid less *** the efficiency of thermomechanical dev.ces is relativ.ly low,they can be applied to collect waste heat which otherwise contributes to negativ. climate *** this rev.ew,operational principles of thermomechanical energy conv.rters and a description of basic dev.ces and materials that utilize thermal energy are *** addition to conv.ntional macroscopic engines,based on thermoacoustic,thermomagnetic,thermoelastic,hydride heat conv.rters,and shape memory alloys,the emergent dev.ces are described which are classified as smart actuators,breathing frameworks,thermoacoustic micro-transducers,nanomechanical resonators,plasmomechanical systems,and optothermal *** performance of the different types of thermomechanical energy conv.rters is described and compared.

关键词： Thermal energy smart actuator thermomechanical conv.rter thermoelastic engine molecular machines emergent dev.ces

A rev.ew of CNTs and graphene reinforced YSZ nanocomposites:Preparation,mechanical and anti-irradiation properties

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Journal of Materials Science & Technology 2023年第36期167卷 27-49页

作者： Xiaodong Zhang Chenkun Sun Hongzhi Ji Mingqi Yang Haipeng Zhang Wei Tian Yiyong Wu oleg v.Tolochko You Wang School of Materials Science and Engineering Harbin Institute of TechnologyHarbin 150001China No.703 Research Institute of China State Shipbuilding Company Limited Harbin 150078China Luoyang Bearing Science&Technology Co.Ltd. Luoyang 471039China AECC Sichuan Gas Turbine Establishment Chengdu 610500China Peter the Great Saint Petersburg Polytechnic Univ.rsity(SPbPU) Polytechicheskaya St.29Saint Petersburg 195251Russia

Yttria stabilized zirconia(YSZ)ceramics hav. been widely applied in areas of high-temperature thermal protection and nuclear radiation protection during the past *** carbon nanotubes(CNTs)and graphene are regarded as highly ideal reinforcements for YSZ ceramics due to their natural excellent ***,is still a controv.rsial topic how to make YSZ composites obtain better performance after adding CNTs and *** particular,dispersion and sintering processes of CNTs and graphene in YSZ,are critical to the performance of the YSZ *** far,there is not a thorough analy-sis of the impact of CNTs and graphene on the mechanical characteristics and irradiation resistance of ***,this paper focuses on the dispersion methods and sintering technologies of CNTs/YSZ and graphene/YSZ nanocomposites,as well as the mechanical properties and anti-irradiation ***-thermore,the potential applications are also prospected for CNTs/YSZ and graphene/YSZ nanocomposites.

关键词： CNTs/YSZ Graphene/YSZ Dispersion methods Sintering technologies Mechanical properties Irradiation resistance