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Nano Research 2015年第6期8卷 2063-2072页

作者： Andrei T. Matv.ev.Konstantin L. Firestein Alexander E. Steinman Andrey M. Kov.lskii Oleg I. Lebedev.dmitry v. shtansky Dmitri Golberg National Univ.rsity of Science and Technology 'MISIS' Leninskiy prospect 4 Moscow 119049 Russia CRISMAT UMR 6508 CNRS-ENSICAEN 6BdMarechalJuin Caen 14050 France Institute for Materials Science (NIMS) Namiki 1 Ibaraki Tsukuba 3050044 Japan

High-purity straight and discrete multiwalled boron nitride nanotubes （BNNTs） were grown v.a a boron oxide v.por reaction with ammonia using LiNO3 as a promoter. Only a trace amount of boron oxide was detected as an impurity in the BNNTs by energy-dispersiv. X-ray （EDX） and Raman spectroscopies. Boron oxide v.por was generated from a mixture of B, FeO, and MgO powders heated to 1,150 ℃, and it was transported to the reaction zone by flowing ammonia. Lithium nitrate was applied to the upper side of a BN bar from a water solution. The bar was placed along a temperature gradient zone in a horizontal tubular furnace. BNNTs with av.rage diameters of 30-50 nm were mostly observ.d in a temperature range of 1,280-1,320 ℃. At higher temperatures, curled polycrystalline BN fibers appeared. Abov. 1,320 ℃, the number of BNNTs drastically decreased, whereas the quantity and diameter of the fibers increased. The mechanism of BNNT and fiber growth is proposed and discussed.

关键词： boron nit-ride nanotubes Cv. lithium nitrate lithium borate BNNT growth mechanism

Combination of Instrumented Nanoindentation and Scanning Probe Microscopy for Adequate Mechanical Surface Testing

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Journal of Materials Science & Technology 2009年第1期25卷 63-68页

作者： Enrico Tam Mikhail Petrzhik dmitry shtansky Marie-Paule Delplancke-Ogletree Univ.rsité Libre de Bruxelles Moscow State Institute of Steel and Alloys

The elastic indentation modulus and hardness of standard bulk materials and adv.nced thin films were determined by using the nanoindentation technique followed by the Oliv.r- Pharr post-treatment. After measurements with different loading/unloading schemes on chemically polished bulk titanium a substantial decrease of both modulus and hardness v. an increasing loading time was found. Then, hard nanostructured TiBN and TiCrBN thin films deposited by magnetron sputtering （using multiphase targets） on substrates of high roughness （sintered hard metal） and low roughness （silicon） were studied. Experimental modulus and hardness characterized by using two different nanoindenter tools were within the limits of standard dev.ation. Howev.r, a strong effect of roughness on the spread of the experimental v.lues was observ.d and it was found that hardness and elastic indentation modulus obeyed a Gaussian distribution. The experimental data were discussed together with scanning probe microscopy （SPM） images of typical imprints taken after the nanoindentation tests and the local topographyls strong correlation with the results of nanoindentation was described.

关键词： Nanoindentation Thin films Coatings Scanning probe microscopy

Alternativ. Strategy for Dev.lopment of Dielectric Calcium Copper Titanate‑Based Electrolytes for Low‑Temperature Solid Oxide Fuel Cells

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Nano-Micro Letters 2025年第1期17卷 310-332页

作者： Sajid Rauf Muhammad Bilal Hanif Zuhra Tayyab Matej v.is MAKYousaf Shah Nav.ed Mushtaq dmitry Medv.dev.Yibin Tian Chen Xia Martin Motola Bin Zhu College of Mechatronics and Control Engineering Shenzhen UniversityShenzhen 518060People’s Republic of China Department of Inorganic Chemistry Faculty of Natural SciencesComenius University BratislavaIlkovicova684215 BratislavaSlovakia Energy Storage Joint Research Center School of Energy and EnvironmentSoutheast UniversityNanjing 210096People’s Republic of China Hydrogen Energy Laboratory Ural Federal University620002 EkaterinburgRussia Laboratory of Electrochemical Dev.ces Based on Solid Oxide Proton Electrolytes Institute of High Temperature Electrochemistry620066 EkaterinburgRussia School of Microelectronics Hubei UniversityWuhan 430062People’s Republic of China

The dev.lopment of low-temperature solid oxide fuel cells(LT-SOFCs)is of significant importance for realizing the widespread application of *** has stimulated a substantial materials research effort in dev.loping high oxide-ion conductiv.ty in the electrolyte layer of *** this context,for the first time,a dielectric material,CaCu_(3)Ti_(4)O_(12)(CCTO)is designed for LT-SOFCs electrolyte application in this *** indiv.dual CCTO and its heterostructure materials with a p-type Ni_(0.8)Co_(0.15)Al_(0.05)LiO_(2−δ)(NCAL)semiconductor are ev.luated as alternativ. electrolytes in LT-SOFC at 450–550℃.The single cell with the indiv.dual CCTO electrolyte exhibits a power output of approximately 263 mW cm^(-2) and an open-circuit v.ltage(OCv.of 0.95 v.at 550℃,while the cell with the CCTO–NCAL heterostructure electrolyte capably deliv.rs an improv.d power output of approximately 605 mW cm^(-2) along with a higher OCv.ov.r 1.0 v.which indicates the introduction of high hole-conducting NCAL into the CCTO could enhance the cell performance rather than inducing any potential short-circuiting *** is found that these promising outcomes are due to the interplay of the dielectric material,its structure,and ov.rall properties that led to improv. electrochemical mechanism in CCTO–***,density functional theory calculations prov.de the detailed information about the electronic and structural properties of the CCTO and NCAL and their heterostructure CCTO–*** study thus prov.des a new approach for dev.loping new adv.nced electrolytes for LT-SOFCs.

关键词： LT-SOFCs Dielectric CaCu_(3)Ti_(4)O_(12) Semiconductor Ni_(0.8)Co_(0.15)Al_(0.05)LiO_(2−δ) Ionic conductiv.ty Heterostructure electrolyte

Protectiv. Composite Coatings Formed on Mg Alloy Surface by PEO Using Organofluorine Materials

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Journal of Materials Science & Technology 2017年第7期33卷 661-667页

作者： dmitry v. Mashtalyar Konstantine v. Nadaraia Sergey L. Sinebryukhov.Sergey v. Gnedenkov Institute of Chemistry Far Eastern BranchRussian Academy of SciencesVladivostok 690022Russia Far Eastern Federal Univ.rsity Vladivostok 690950Russia

The results of the surface modification of magnesium alloys by plasma electrolytic oxidation（PEO） and subsequent treatment in suspension of the superdispersed polytetrafluoroethylene（SPTFE） or telomeric solution of tetrafluoroethylene（TFE） are presented. Composite coatings hav. been obtained by dipping with subsequent heat treatment. Electrochemical, tribological properties and wettability of protectiv. composite coatings hav. been inv.stigated. Composite coatings formed on PEO-layer by fourfold treatment of samples in SPTFE suspension possess best protectiv. properties. The obtained coatings decrease the corrosion current density（5.4 × 10^（-11） A cm^（-2）） and wear（7.6 × 10^（-7）mm^3（Nm）^（-1））, and increase the polarisation resistance（1.7 × 10~9 cm^2） and impedance modulus（1.9 × 10~9 cm^2） by orders of magnitude in comparison with unprotected magnesium alloy and base PEO-coating. The highest v.lue of contact angle（CA） has been obtained for coatings with triple application in telomeric solution. CA for such composite coatings attains（171 ± 2）？, as the result of multimodal roughness of the composite coating＇s surface.

关键词： Mg-Mn-Ce alloy Corrosion PEO-coatings Composite coatings Wear Hydrophobicity

Structure,magnetic and adsorption properties of nov.l FePt/h-BN heteromaterials

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Nano Research 2023年第1期16卷 1473-1481页

作者： Anton S.Konopatsky v.adislav. v.Kalinina Alena S.Sav.henko Denis.v.Leybo Ekaterina v.Sukhanov. v.ktor S.Baidyshev.Zakhar I.Popov.Andrey v.Bondarev.Josef Polčák dmitry v.shtansky National Univ.rsity of Science and Technology(MISIS) Leninskiy prospect 4Moscow119049Russia Emanuel Institute of Biochemical Physics RAS Kosygina 4Moscow119334Russia Katanov.Khakas State Univ.rsity 90 Lenin pr.655017 AbakanRussia Plekhanov.Russian Univ.rsity of Economics 36 Stremyanny per.Moscow 117997Russia Department of Control Engineering Faculty of Electrical EngineeringCzech Technical University in PragueTechnicka 2Prague 16627Czech Republic CEITEC-Central European Institute of Technology Brno University of TechnologyPurkyňova 123Brno 61200 BrnoCzech Republic

Nanomaterials with high specific surface area and high absorption capacity are attracting increased interest aimed at imparting the desired magnetic *** work is dev.ted to the study of the effect of heat treatment in a hydrogen atmosphere on the microstructure,adsorption and magnetic properties of heterogeneous FePt/h-BN *** v.a the polyol process,FePt nanoparticles(NPs)had a sizev.r the surface of hexagonal boron nitride(h-BN)*** temperature-activ.ted fcc→fct phase transformation in ultrafine FePt NPs has been well *** NPs act as activ. centers dissociating H2 molecules and transfer adsorbed hydrogen atoms to the *** functional theory(DFT)calculations also indicate that the h-BN substrate can absorb hydrogen adsorbed on the FePt *** hydrogen circulation in the FePt/h-BN system promoted the fcc→fct phase transformation and allowed to control the magnetic ***/h-BN nanomaterials also exhibited a high adsorption capacity with respect to v.rious organic dyes.

关键词： FePt/h-BN nanomaterials polyol synthesis phase transformations magnetic properties adsorption

Features of adult neurogenesis and neurochemical signaling in the Cherry salmon Oncorhynchus masou brain

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Neural Regeneration Research 2013年第1期8卷 13-23页

作者： Ev.eniya v. Pushchina dmitry K. Obukhov.Anatoly A. v.raksin Laboratory of Cytophysiology Institute of Marine Biology Far East Branch Russian Academy of Sciences St. Petersburg State Univ.rsity

We inv.stigated the distribution of gamma aminobutyric acid, tyrosine hydroxylase and nitric oxide-producing elements in a cherry salmon Oncorhynchus masou brain at v.rious stages of postnatal ontogenesis by immunohistochemical staining and histochemical staining. The periv.ntricular region cells exhibited the morphology of neurons and glia including radial glia-like cells and contained sev.ral neurochemical substances. Heterogeneous populations of tyrosine hydroxylase-, gamma aminobutyric acid-immunoreactiv., as well as nicotinamide adenine dinucleotide phosphate diaphorase-positiv. cells were observ.d in proliferating cell nuclear antigen-immunoreactiv. proliferativ. zones in periv.ntricular area of diencephalon, central grey layer of dorsomedial tegmentum, medulla and spinal cord. Immunolocalization of Pax6 in the cherry salmon brain rev.aled a neuromeric construction of the brain at v.rious stages of postnatal ontogenesis, and this was confirmed by tyrosine hydroxylase and gamma aminobutyric acid labeling.

关键词： neural regeneration neurogenesis teleostei adult neurogenesis neurotransmitter signaling migration tyrosine hydroxylase gamma aminobutyric acid dev.lopment Pax6 NADPH-diaphorase proliferation grant-supported paper neuroregeneration

Formation of diffuse and spark discharges between two needle electrodes with the scattering of particles

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Plasma Science and Technology 2024年第9期26卷 32-39页

作者： v.ctor F TARASENKO dmitry v.BELOPLOTOv.Alexei N PANCHENKO dmitry A SOROKIN Institute of High Current Electronics Siberian BranchRussian Academy of SciencesTomsk 634055Russia National Research Tomsk State Univ.rsity Tomsk 634050Russia

The dev.lopment of a nanosecond discharge in a pin-to-pin gap filled with air at atmospheric pressure has been studied with high temporal and spatial resolutions from a breakdown start to the spark *** and negativ. nanosecond v.ltage pulses with an amplitude of tens of kilov.lts were ***-resolv.d images of the discharge dev.lopment were taken with a fourchannel Intensified Charge Coupled Dev.ce(ICCD)*** minimum delay between the camera channels could be as short as≈0.1 *** made it possible to study the gap breakdown process with subnanosecond *** was observ.d that a wide-diameter streamer dev.lops from the high-v.ltage pointed *** ionization processes near the grounded pin electrode started when the streamer crossed half of the *** bridging the gap by the streamer,a diffuse discharge was *** dev.lopment of spark leaders from bright spots on the surface of the pointed electrodes was observ.d at the next *** was found that the rate of dev.lopment of the spark leader is an order of magnitude lower than that of the wide-diameter *** thin luminous tracks were observ.d against the background of a discharge plasma *** has been established that the tracks are adjacent to brightly glowing spots on the electrodes and are associated with the flight of small particles.

关键词： needle electrodes short v.ltage pulses atmospheric air streamer breakdown diffuse and spark discharges scattering metal particles

Comparison of linear and nonlinear extreme wav. statistics

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Acta Oceanologica Sinica 2016年第5期35卷 99-105页

作者： dmitry Chalikov.ALEXANDER v.Babanin Swinburne Univ.rsity of Technology Victoria 3122 Australia P.P. Shirshov.Institute of Oceanology Saint-Petersburg 199053 Russia

An extremely large（＂freak＂） wav. is a typical though rare phenomenon observ.d in the sea. Special theories（for example, the modulation instability theory） were dev.loped to explain mechanics and appearance of freak wav.s as a result of nonlinear wav.-wav. interactions. In this paper, it is demonstrated that the freak wav. appearance can be also explained by superposition of linear modes with the realistic spectrum. The integral probability of trough-to-crest wav.s is calculated by two methods： the first one is based on the results of the numerical simulation of a wav. field ev.lution performed with one-dimensional and two-dimensional nonlinear *** second method is based on calculation of the same probability ov.r the ensembles of wav. fields constructed as a superposition of linear wav.s with random phases and the spectrum similar to that used in the nonlinear simulations. It is shown that the integral probabilities for nonlinear and linear cases are of the same order of v.lues

关键词： freak wav.s numerical modeling probability of linear and nonlinear wav.s ensemble modeling

Ecological Niche Modelling Rev.als the Peculiarities of Ecological Disjunction Between Two Sympatric Racerunners in Kazakhstan:Eremias lineolata(Nikolsky,1897)and Eremias scripta(Strauch,1867)

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Asian Herpetological Research 2023年第2期14卷 123-137页

作者： Marina A.CHIRIKOv. dmitry v.MALAKHOv Institute of Zoology Committee of Scientific Ministry of Science and Higher EducationAl-Farabi 93 AkademgorodokAlmaty 050060Kazakhstan

The ecological-niche models for two sympatric species,Eremias lineolata(Nikolsky,1897)and Eremias scripta(Strauch,1867),rev.al ev.dence of spatial and temporal disjunction in the actual niches of both *** lineolata demonstrates a wide range of adaptations and,at the same time,has a greater need for winter precipitation and minimal temperature than *** explanations for the thermal div.rsity of both species are *** v.riables(monthly temperatures,monthly solar radiation,etc.)are traditionally important for ectotherm ***,as many as half of the key v.riables in both species are related to different aspects of env.ronmental water balance(precipitation,air humidity,v.por pressure).There are sev.ral ways in which moisture may impact the lizard’s life *** humidity is related to soil temperature and may be important during winter *** summer,soil humidity may support successful *** during the warm months is a key factor in maintaining the moisture content of the *** winter,snow cov.r prov.des a better thermal balance of the soil’s top layers where winter shelters are *** niche modeling(ENM)is an interdisciplinary approach combining the geographical,climatic,ecological,and biological aspects of the wellbeing of *** interdisciplinary approach lifts biological studies onto a new,integrativ. lev.l,prov.ding a comprehensiv. v.ew on species biology and answering the questions that might not be answered if the traditional methods for studying animals were used alone.

关键词： ecology Kazakhstan niche modelling racerunners species distribution

Fast Rev.aling of Mode Ranks of Tensor in Canonical Form

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Numerical Mathematics(Theory,Methods and Applications) 2009年第4期2卷 439-444页

作者： dmitry v.Sav.styanov Institute of Numerical Mathematics Russian Academy of Sciences

Considering the problem of mode ranks rev.aling of d-dimensional array (tensor) giv.n in canonical form,we propose fast algorithm based on cross approximation of Gram matrices of unfoldings.

关键词： Multidimensional array canonical decomposition Tucker approximation fast recompression.