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Detection of.per-and polyf.uoroalkyl water contaminants with a multiplexed 4D microcavities sensor

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Photonics Research 2023年第11期11卷 I0025-I0033页

作者： ANTON V.SAETCHNIKOV ELINA A.TCHERNIAVSKAIA vladimir A.SAETCHNIKOV ANDREAS OSTENDORf Chair of.Applied Laser Technologies Ruhr University Bochum44801 BochumGermany Physics Department Belarusian State University220030 MinskBelarus Radio Physics Department Belarusian State University220064 MinskBelarus

The per-and polyf.uoroalkyl substances(Pf.S)are a group of.organof.uorine chemicals treated as the emerging pollutants that are currently of.particularly acute *** compounds have been employed intensively as surf.ctants over multiple decades and are already to be f.und in surf.ce and ground waters at amounts suf.icient to have an ef.ect on human health and *** of.the carbon–f.uorine bonds,the Pf.S have an extreme environmental persistence and their negative impact accumulates with f.rther production and penetration into the *** Germany alone,more than thousands of.sites have been identif.ed as contaminated with Pf.S;thus,timely detection of.Pf.S residue is becoming a high *** this paper,we report on the high perf.rmance optical detection method based on whispering gallery mode(WGM)microcavities applied f.r the f.rst time to detect Pf.S contaminants in aqueous solutions.A self.sensing boosted 4D microcavity f.bricated with two-photon polymerization is employed as an individual sensing *** an example of.the multiplexed imaging sensor with multiple hundreds of.simultaneously interrogated microcavities we demonstrate the possibility to detect the Pf.S chemicals representatives at a level down to 1 ppb(parts per billion).

关键词： f.uorine hundreds becoming

Chapter 5 Dark Matter and New Physics Beyond the Standard Model with LHAASO

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Chinese Physics C 2022年第3期46卷 126-138页

作者： Xiao-Jun Bi Andrea Addazi Konstantin Belotsky Vitaly Beylin Marco Cirelli Arman Esmaili Nicolao f.rnengo Qing-Yu Gan Michael Kachekriess Maxim Khlopov vladimir Korchagin Alexander Korochkin vladimir Kuksa Antonino Marciano Andrei Neronov Paolo Panci Roman Pasechnick Alexander Sakharov f.lippo Sala Giuseppe Di Sciascio Dimiri Semikoz Pasquale Dario Serpico Nikolay Volchanskiy Peng-f.i Yin Key Laboratory of.Particle Astrophysics Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China Center f.r Theoretical Physics College of Physics Science and TechnologySichuan UniversityChengdu 610065China Laboratori Nazionali di f.ascati INf. Frasacati(Rome)ItalyEU National Research Nuclear University MEPHI(Moscow State Engineering Physics Institute) 31 Kashirskoe chausseeMoscow 115409Russia Institute of.Physics Southern Federal University Stachki 194Rostov on Don 344090Russia LPTHE CNRS and Sorbonne Universit′e4 Place JussieuF-75252ParisFrance Departamento de f.sica Pontificia Universidade Catolica do Rio de JaneiroRio de Janeiro 22452-970Brazil Dipartimento di f.sica Universita di TorinoVia P.Giuria 110125 TorinoItaly Istituto Nazionale di f.sica Nucleare Sezione di TorinoVia P.Giuria 110125TorinoItaly Institutt f.r f.sikk NTNU7491 TrondheimNorway Universite de Paris CNRSAstroparticule et CosmologieF-75013 ParisFrance Department of.Physics and Center f.r f.eld Theory and Particle Physics Fudan UniversityShanghai 200433China Astronomy Department University of GeneveCh.d’Ecogia 161290VersolxSwitzerland Dipartimento di f.sica Universita di Pisa and INFNSezione di Pisa Largo Pontecorvo 356127 PisaItaly Department of.Astronomy and Theoretical Physics Lund University22100 LundSwedenEU Experimental Physics Department CERNGeneva 23 CH 1211Switzerland Department of.Physics New York UniversityNew York NY United States of.America INf. sezione Roma Tor Vergata I-00133 RomeItaly LAPTh Univ.Grenoble AlpesUSMBCNRSF-74000 AnnecyFrance Bogoliubov Laboratory of.Theoretical Pjysics JINRDubnaRussia

In order to reveal the nature of.dark matter,it is crucial to detect its non-gravitational interactions with the standard model *** traditional dark matter searches f.cused on the so-called weakly interacting massive ***,this paradigm is strongly constrained by the null results of.current experiments with high *** there is a renewed interest of.searches f.r heavy dark matter particles above TeV *** Large High Altitude Air Shower Observatory(LHAASO)with large ef.ective area and strong background rejection power is very suitable to investigate the gamma-ray signals induced by dark matter annihilation or decay above TeV *** this document,we review the theoretical motivations and background of.heavy dark *** review the prospects of.searching f.r the gamma-ray signals resulted f.om dark matter in the dwarf.spheroidal satellites and Galactic halo f.r LHAASO,and present the projected *** also review the prospects of.searching f.r the axion-like particles,which are a kind of.well motivated light pseudo-scalars,through the LHAASO measurement of.the very high energy gamma-ray spectra of.astrophysical sources.

关键词： dark matter gamma-ray axion-like particle

Next-Nearest-Neighbor Tight-Binding Model of.Plasmons in Graphene

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Graphene 2013年第3期2卷 97-101页

作者： vladimir Kadirko Klaus Ziegler Eugene Kogan Department of.Physics Bar-Ilan University Ramat Gan Israel Institut f.r Physik Universitat Augsburg Augsburg Germany

In this paper we investigate the inf.uence of.the next-nearest-neighbor coupling on the spectrum of.plasmon excitations in graphene. The nearest-neighbor tight-binding model was previously considered to calculate the plasmon spectrum in graphene [1]. We extend these results to the next-nearest-neighbor tight-binding model. As in the calculation of.the nearest-neighbor model, our approach is based on the numerical calculation of.the dielectric f.nction and the loss f.nction. We compare the plasmon spectrum of.the two models and discuss the dif.erences in the dispersion.

关键词： Graphene Plasmon Tight-Binding Model

Ca^(2+) Entry Through TRPC1 Channels Contributes to Intracellular Ca^(2+) Dynamics and Consequent Glutamate Release f.om Rat Astrocytes

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神经损伤与功能重建 2008年第3期3卷 176-191页

作者： ERIK B.MALARKEY YINGCHUN NI vladimir PARPURA Department of.Neurobiology Center for Glial Biology in MedicineAtomic Force Microscopy and Nanotechnology LaboratoriesCivitan International Research CenterEvelyn F.McKnight Brain InstituteUniversity of AlabamaBirminghamAlabama National Institute of.Child Health and Human Development National Institutes of HealthBethesdaMaryland

各种不同的刺激作用于星型胶质细胞,可以导致胞浆内Ca2+浓度增加,进而释放更多谷氨酸作用于周边的神经元。大部分Ca2+来源于细胞内,小部分来源于细胞外。Ca2+内流是通过钙池操纵Ca2+通道(SOC)实现的。因此,作者观察在星型胶质细胞内Ca2... 详细信息

各种不同的刺激作用于星型胶质细胞,可以导致胞浆内Ca2+浓度增加,进而释放更多谷氨酸作用于周边的神经元。大部分Ca2+来源于细胞内,小部分来源于细胞外。Ca2+内流是通过钙池操纵Ca2+通道(SOC)实现的。因此,作者观察在星型胶质细胞内Ca2+激活与谷氨酸释放过程中钙池操纵Ca2+通道(SOC)发挥了什么样的作用。已有研究显示星型胶质细胞所表达的TRPC通道(Ca2+通过瞬时受体电位通道相关蛋白)介导了钙池操纵Ca2+的内流。本文发现培养的星形胶质细胞以及从视皮质中新分离的星形胶质细胞表达TRPC1,TRPC4,和TRPC5。间接免疫组化显示这些蛋白存在于整个细胞中,然而机能检测TRPC1主要表达在质膜上。在新分离的星形胶质细胞中做标记,显示了在细胞发育过程中TRPC表达的改变。应用抗TRPC1的抗体,可以阻断TRPC1通道并且可以测定它们在培养的星形细胞的机械性和激动剂触发的钙离子内流过程中的作用。阻断TRPC1可以减少机械诱导的钙离子依赖性的谷氨酸盐的释放。这些实验数据表明,钙离子通过TRPC1通道的内流有助于钙离子在星形细胞中的信号传导以及由此引起的谷氨酸盐的释放。

关键词：钙池操纵Ca^2+ 通道 Ca^2+ 依赖性谷氨酸释放胞外分泌信号传导

Ef.ects of.a Combined Silica-containing Additive on Structural and Rheological Properties of.a Low-cement Silicon Carbide Castable

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China's Ref.actories 2022年第2期31卷 1-6页

作者： Valeriy V.MARTYNENKO vladimir V.PRIMACHENKO Pavlo O.KUSHCHENKO Iri na G.SHULIK Ludmyla K.SAVINA The Ukrainian Research Institute of.Ref.actories named af.er A.S.Berezhnoy Kharkiv 61024Ukraine

The use of.a combined additive consisting of.silica-containing additives“f.(thinning)and“S”(accelerating castable hardening)instead of.the previously used silica-containing additive“A”and a mixture of.dispersing additives based on polyethylene glycol in low-cement silicon carbide castable allows to improve the castable workability by increasing(in 5.4 times)the f.owability of.a f.eshly prepared castable,and increase by 1.2 and 1.1 times the cold crushing strength of.heat-treated at temperatures of.110 and 1580°C,respectively,castable samples f.om low-cement silicon carbide castable with practically equal values of.open porosity(15.8%and 16.0%).The petrographic studies of.the castable sample microstructure af.er f.ring at a temperature of.1580°C showed that the investigated silica-containing additives“f.and“S”contribute to the denser and more unif.rm structure *** a result of.the carried out research,the manuf.cturing technology of.a low-cement silicon carbide castable was improved,of.which the production was mastered at JSC“URIR named af.er ***”.

关键词： low-cement silicon carbide castable additives f.owability structure strength

射频等离子体改性PTf.表面液滴撞击接触起电对润湿性的影响

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中国表面工程 2023年第6期36卷 145-154页

作者：李昱鹏孟祥任刘玉霞霍磊雷明凯 STARINSKIY Sergey V TEREKHOV vladimir 大连理工大学材料科学与工程学院大连116024 俄罗斯科学院西伯利亚分院热物理研究所俄罗斯新西伯利亚630090

液滴撞击固体表面是自然界的常见现象,研究超疏水表面的液滴撞击对其润湿性的影响,对于超疏水性材料的潜在应用具有重要的科学意义。采用3、10、20 min氧等离子体处理(OPT)和1 min八氟环丁烷等离子体聚合沉积(PPD)的等离子体方法改性聚... 详细信息

液滴撞击固体表面是自然界的常见现象,研究超疏水表面的液滴撞击对其润湿性的影响,对于超疏水性材料的潜在应用具有重要的科学意义。采用3、10、20 min氧等离子体处理(OPT)和1 min八氟环丁烷等离子体聚合沉积(PPD)的等离子体方法改性聚四氟乙烯(PTf.)表面,获得具有不同尺寸和间距的微/纳米锥的超疏水PTf.表面,研究射频等离子体改性PTf.表面的液滴静态接触角、滚动角及液滴撞击动力学行为,分析在不同个数液滴撞击后PTf.表面的润湿性和液滴撞击行为变化,确定PTf.表面液滴撞击起电效应的影响机制。结果表明:通过1~9个液滴撞击后,PTf.表面的静态接触角随撞击液滴数量增加而减小,导致静态接触角低于150°;液滴滚动角随撞击液滴数量增加而增大,造成液滴滚动角高于10°。撞击液滴的接触时间随撞击液滴数量增加而增大,回弹系数随撞击液滴数量增加而减小。随撞击液滴数量增加,回弹液滴的正电荷和PTf.表面的负电压增大,PTf.表面的负电荷对液滴产生强吸引作用,导致低粘附超疏水性被破坏。3 min OPT和1 min PPD改性PTf.表面的纳米锥间距小,密度大,表面负电荷量增加明显,造成PTf.表面的疏水性降低的程度最显著。研究结果可为改善超疏水稳定性的表面织构设计提供理论依据。

关键词：超疏水性表面液滴撞击接触起电聚四氟乙烯(PTf.) 接触角

高性能电容器用富勒烯/石墨烯三维全碳杂化材料

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新型炭材料 2020年第6期35卷 684-695页

作者：程蕾李幸娟李静邱汉迅薛裕华 Kuznetsova-Iren Evgenyevna vladimir Kolesov 陈成猛杨俊和上海理工大学材料科学与工程学院上海200093 Kotelnikov Institute of.Radio Engineering and Electronics Russian Academy of ScienceMoscow 125009Russia 中国科学院山西煤化学研究所炭材料重点实验室山西太原030001

通过简单的水热过程将C60分子引入石墨烯片层,可控制备了具有三维多孔结构的全碳C60/石墨烯杂化材料,该材料作电极材料时电容性能得到明显提高。研究表明,C60分子和石墨烯骨架中的碳六元环之间的共轭相互作用有利于C60与石墨烯在高压水... 详细信息

通过简单的水热过程将C60分子引入石墨烯片层,可控制备了具有三维多孔结构的全碳C60/石墨烯杂化材料,该材料作电极材料时电容性能得到明显提高。研究表明,C60分子和石墨烯骨架中的碳六元环之间的共轭相互作用有利于C60与石墨烯在高压水热条件下自组装形成三维多孔结构。C60分子的加入使杂化产物具有优化的多孔结构和更多的氧化还原活性位点,这赋予杂化产物优异的电化学性能。以浓度为6 mol/L KOH溶液作为电解质,当电流密度为1 A/g时,其比电容为332.3 f.g,与三维多孔结构石墨烯材料电极相比提高了54.5%。此外,作为完全由碳原子组成的复合电极材料,其表现出的电化学性能优于文献报道的类似碳基材料。这一研究表明全碳杂化电极材料在用于制造高性能超级电容器方面具有很强竞争力和广阔应用前景,为未来基于全碳电极的高性能储能器件的设计和制备提供了有价值参考。

关键词：石墨烯富勒烯(C 60) 全碳杂化电化学性能超级电容器

The state of.gold in phases of.the Cu-f.-S system:In situ X-ray absorption spectroscopy study

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Geoscience f.ontiers 2023年第3期14卷 103-116页

作者： Boris R.Tagirov Olga N.f.limonova Alexander L.Trigub Ilya V.Vikentyev Elena V.Kovalchuk Maximilian S.Nickolsky Andrey A.Shiryaev vladimir L.Reukov Dmitry A.Chareev Institute of.Geology of.Ore Deposits(IGEM RAS) 35Staromonetnyi per119017 MoscowRussia National Research Centre‘Kurchatov Institute’ 1Akademika Kurchatova pl123182 MoscowRussia Institute of.Physical Chemistry and Electrochemistry(IPCE RAS) 31Leninsky Prospect119071 MoscowRussia Institute of.Experimental Mineralogy(IEM RAS) 142432 ChernogolovkaMoscow RegionRussia

Chalcopyrite and bornite are the main Au-bearing minerals at Cu porphyry deposits,volcanogenic massive sulf.de(VMS)deposits,Cu-Ni deposits of.the maf.c magmatic complexes,and ores of.submarine sulf.de *** and intermediate solid solutions with wide compositional variations(bnss and iss–high-temperature chalcopyrite,correspondingly),which can scavenge economic concentrations of.Au,appear in the Cu-f.-S system at ore-f.rming ***,the state of.Au in bnss and iss is yet *** solve this conundrum,we synthesized samples with net chemical composition of.bnss and iss,studied them by in situ X–ray absorption spectroscopy(XAS),and used the experimental data to explain the Au distribution among natural ore-f.rming *** sulf.de samples were obtained at 495–700℃ in Au-saturated system by means of.salt f.ux *** bnss contained1.2–1.6 log units more Au than iss:up to 18 wt.%Au in bnss vs 0.4 wt.%Au in iss at 700*** increase of.temperature resulted in the sharp increase of.Au concentration in both phases,1 log unit per 100℃ at f.S2)close to S_((l)) *** of.Au L_(3)-edge spectra recorded at 25–675℃ revealed that at 25℃ Au exists mainly in the metallic *** t>500℃ the spectral f.atures of.Audisappear,and “chemically bound”Au *** Au f.rm of.occurrence in the iss f.eld is interpreted as Au-bearing clusters with a stromeyerite-like(CuAgS)*** Cu_(2–x)S and bnss contain Au in a mixture of.stromeyeritelike and petrovskaite-like(Au_(0.8)Ag_(1.2)S)*** chemical composition of.both f.rms is close to CuAuS,where the nearest Au neighbors are two S atoms at R_(Au-S)=2.34–2.36Å.Results of.the present study allow to determine the state of.Au and its concentration in the main Cu-bearing minerals of.sulf.de ores as a f.nction of.the T-f.S_(2))-compositional *** to the sharp increase of.the CuAuS clusters stability with increasing temperature,in high-temperature ores f.rmed at t>350℃ A

关键词： “Invisible”gold Bornite solid solution Intermediate solid solution Digenite Chalcopyrite X-ray absorption spectroscopy

f.actal Characteristics of.Microporous Adsorbents

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Materials Sciences and Applications 2017年第8期8卷 603-613页

作者： vladimir V. Kutarov Eva Schief.rstein Yuriy Leonidovych Zub Erich Robens Research Institute of.Physics I. I. Mechnikov National University Odesa Ukraine f.aunhof.r Institute UMSICHT Oberhausen Germany Chujko Institute of.Surf.ce Chemistry National Academy of Sciences of Ukraine Kiev Ukraine Battelle-Institut e.V. Frankfurt am Main Germany (formerly) Schlesierstr. 5 Friedrichsdorf Germany

The traditional version of.the theory of.volume f.lling of.micropores was used f.r the estimation of.the f.actal dimension of.microporous solids. f.r this purpose, the Dubinin’s integral equation was solved f.r inf.nite and limited integration limits. The results were applied to the adsorption of.nitrogen (T = 78 K) on coal samples and Davisil f.silica and to the adsorption of.water (Т = 293 К) on lunar soil sample and on rice starch.

关键词： Pore Structure Micropores f.actal Dimension Dubinin’s Equation Mathematical Analysis