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Highly efficient Fe^(3+)-doped A_(2)BB′O_(6)(A=Sr^(2+),Ca^(2+);B,B′=In^(3+),Sb^(5+),Sn^(4+))broadband nearinfrared-emitting phosphors for spectroscopic analysis

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Light(Science & Applications) 2022年第5期11卷 969-978页

作者： Dongjie Liu Guogang Li Peipei Dang Qianqian Zhang Yi Wei Lei Qiu maxim S.Molokeev Hongzhou Lian Mengmeng Shang Jun Lin State Key Laboratory of Rare Earth Resource Utilization Changchun Institute of Applied ChemistryChinese Academy of Sciences130022 ChangchunChina University of Science and Technology of China 230026 HefeiChina Faculty of Materials Science and Chemistry China University of Geosciences430074 WuhanChina Zhejiang Institute China University of Geosciences311305 HangzhouChina Laboratory of Crystal Physics Kirensky Institute of PhysicsFederal Research Center KSC SB RASKrasnoyarsk 660036Russia Institute of Engineering Physics and Radioelectronics Siberian Federal UniversityKrasnoyarsk 660041Russia Research and Development Department Kemerovo State UniversityKemerovo 650000Russia School of Material Science and Engineering Shandong University266071 JinanChina

Near-infrared(NIR)-emitting phosphor-converted light-emitting diodes have attracted widespread attention in various applications based on NIR *** for typical Cr^(3+)-activated NIR-emitting phosphors,next-generation Cr^(3+)-free NIR-emitting phosphors with high efficiency and tunable optical properties are highly desired to enrich the types of NIR luminescent materials for different application ***,we report the Fe^(3+)-activated Sr2−yCay(InSb)1−zSn_(2)zO_(6)phosphors that exhibit unprecedented long-wavelength NIR *** overall emission tuning from 885 to 1005 nm with broadened full-width at half maximum from 108 to 146 nm was realized through a crystallographic site engineering *** NIR emission was significantly enhanced after complete Ca^(2+)incorporation owing to the substitution-induced lower symmetry of the Fe^(3+)*** Ca_(2)InSbO_(6):Fe^(3+)phosphor peaking at 935 nm showed an ultra-high internal quantum efficiency of 87%.The as-synthesized emission-tunable phosphors demonstrated great potential for NIR spectroscopy *** work initiates the development of efficient Fe^(3+)-activated broadband NIR-emitting phosphors and opens up a new avenue for designing NIR-emitting phosphor materials.

关键词： spectroscopy materials spectroscopic

Reservoir and lithofacies shale classification based on NMR logging

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Petroleum Research 2020年第3期5卷 202-209页

作者： Hongyan Yu Zhenliang Wang Fenggang Wen Reza Rezaee maxim Lebedev Xiaolong Li Yihuai Zhang Stefan Iglauer State Key Laboratory of Continental Dynamics National and Local Joint Engineering Research Center for Carbon Capture Utilization and SequestrationDepartment of GeologyNorthwest UniversityXi’an710069China WA School of Mines:Minerals Energy and Chemical EngineeringCurtin University26 Dick Perry Avenue6151KensingtonAustralia Institute of Shaanxi Yanchang Petroleum Group Co. LtdXi’anShaanxi710075China Department of Earth Science and Engineering Imperial College LondonLondonSW72BPUnited Kingdom Shool of Engineering Edith Cowan University270 Joondalup DriveWA6027Australia

Shale gas reservoirs have fine-grained textures and high organic contents,leading to complex pore ***,accurate well-log derived pore size distributions are difficult to acquire for this unconventional reservoir type,despite their ***,nuclear magnetic resonance(NMR)logging can in principle provide such information via hydrogen relaxation time ***,in this paper,NMR response curves(of shale samples)were rigorously mathematically analyzed(with an Expectation maximization algorithm)and categorized based on the NMR data and their geology,*** the number of the NMR peaks,their relaxation times and amplitudes were analyzed to characterize pore size distributions and *** pore size distribution classes were distinguished;these were verified independently with Pulsed-Neutron Spectrometry(PNS)well-log *** study thus improves the interpretation of well log data in terms of pore structure and mineralogy of shale reservoirs,and consequently aids in the optimization of shale gas extraction from the subsurface.

关键词： Shale gas NMR logging Pore size distribution Composition

Extended Corey-Chaykovsky reactions:transformation of 2-hydroxychalcones to benzannulated 2,8-dioxabicyclo[3.2.1]octanes and 2,3-dihydrobenzofurans

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Organic Chemistry Frontiers 2022年第3期9卷 737-744页

作者： Alexander A.Fadeev Anton S.Makarov Olga A.Ivanova maxim G.Uchuskin Igor V.Trushkov Department of Chemistry Perm State UniversityBukireva 15Perm 614990Russian Federation Department of Chemistry M.V.Lomonosov Moscow State UniversityLeninskie Gory 1-3Moscow 119991Russian Federation N.D.Zelinsky Institute of Organic Chemistry Leninsky pr.47Moscow 119334Russian Federation. D.Rogachev National Medical Research Center of Pediatric Hematology Oncology and ImmunologySamory Mashela 1Moscow 117997Russian Federation

We report the divergent synthesis of benzannulated 2,8-dioxabicyclo[3.2.1]octanes and 2,3-dihydrobenzofurans using the concept of extended Corey-Chaykovsky *** this concept,2-hydroxychalcones were treated with the Corey ylide providing highly reactive donor-acceptor cyclopropanes that were introduced in a one pot manner for further transformations.

关键词： octane donor

Special nanostructures in Al-Mg alloys subjected to high pressure torsion

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Transactions of Nonferrous Metals Society of China 2010年第11期20卷 2051-2056页

作者：刘满平 Hans J.ROVEN 刘新涛 maxim MURASHKIN Ruslan Z.VALIEV Tamas UNGáR Levente BALOGH National Engineering Research Center of Light Alloy Net Forming Shanghai Jiao Tong University Department of Materials Science and Engineering Norwegian University of Science and Technology Institute of Physics of Advanced Materials Ufa State Aviation Technical University Department of Materials Physics Etvs University

Deformation twins and stacking faults were observed in nanostructure A1-Mg alloys subjected to high pressure torsion. These observations are surprising because deformation twinnings have never been observed in their coarse-grained counterparts under normal conditions. Experimental evidences are introduced on non-equilibrium grain boundaries, deformation twinnings and partial dislocation emissions from grain boundaries. Some of these features can be explained by the results reported from molecular-dynamics simulations of pure FCC metals. Special emphasis is laid on the recent observations of high density hexagonal and rhombic shaped nanostructures with an average size of 3 nm in the A1-Mg alloys processed by high pressure torsion. A possible formation process of these nanostructures is proposed based on molecular-dynamics simulations.

关键词： aluminum alloys severe plastic deformation high pressure torsion grain boundary structure deformation twinning nanostructures

Towards Sustainable BRICS Collaboration in Education

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China Today 2017年第9期66卷 24-25页

作者： maxim KHOMYAKOV the BRICS Studies Centerat UralFederal University

MANY experts in higher education today continually comment on the contempporary academic *** comments usually concern four main processes,which have jointly determined radical changes in today’s university *** proces...

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Vibration diagnostics of weak base embankments

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Research in Cold and Arid Regions 2013年第5期5卷 530-533页

作者： Evgenij Ashpiz Vladimir Kapustin Svetlana Klepikova maxim Shirobokov Moscow State University of Railway Transportation Research and Survey Institute Geotech

In this paper the theoretical background was analyzed for vibration diagnostics method and experience in its application for weak base embankments. General schemes of survey and recommendations on hardware systems and... 详细信息

关键词： vibration diagnostics embankments weak base

FLPs催化烯胺还原活性研究及反应机理探讨

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高等学校化学学报 2022年第11期43卷 80-86页

作者：温志国谯在银田冲 maxim Borzov 聂万丽乐山师范学院新能源材料与化学学院天然产物化学与小分子催化四川省高校重点实验室乐山614000 峨眉山宏昇药业股份有限公司峨眉山614200

对不同的路易斯碱、不同取代的氢化硅烷以及不同结构的烯胺进行了研究.结果表明,无论在何种光照条件下,硅氢化反应都不是主要反应;根据用氘代硅烷试剂对反应机理进行相应的同位素效应研究结果推测,反应按照自由基机理进行的可能性最为合... 详细信息

对不同的路易斯碱、不同取代的氢化硅烷以及不同结构的烯胺进行了研究.结果表明,无论在何种光照条件下,硅氢化反应都不是主要反应;根据用氘代硅烷试剂对反应机理进行相应的同位素效应研究结果推测,反应按照自由基机理进行的可能性最为合理.本文研究结果对探索受限路易斯酸碱对(FLPs)体系的催化方式及进一步拓宽其应用领域具有重要意义.

关键词：受限路易斯酸碱对烯胺还原机理受限自由基对

Generative artificial intelligence and its applications in materials science:Current situation and future perspectives

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Journal of Materiomics 2023年第4期9卷 798-816页

作者： Yue Liu Zhengwei Yang Zhenyao Yu Zitu Liu Dahui Liu Hailong Lin Mingqing Li Shuchang Ma maxim Avdeev Siqi Shi School of Computer Engineering and Science Shanghai UniversityShanghai200444China State Key Laboratory of Advanced Special Steel School of Materials Science and EngineeringShanghai UniversityShanghai200444China Materials Genome Institute Shanghai UniversityShanghai200444China Shanghai Engineering Research Center of Intelligent Computing System Shanghai200444China Australian Nuclear Science and Technology Organisation Sydney2232Australia School of Chemistry The University of SydneySydney2006Australia

Generative Artificial Intelligence(GAI)is attracting the increasing attention of materials community for its excellent capability of generating required *** the introduction of Prompt paradigm and reinforcement learning from human feedback(RLHF),GAI shifts from the task-specific to general pattern gradually,enabling to tackle multiple complicated tasks involved in resolving the structure-activity ***,we review the development status of GAI comprehensively and analyze pros and cons of various generative models in the view of *** applications of task-specific generative models involving materials inverse design and data augmentation are also *** ChatGPT as an example,we explore the potential applications of general GAI in generating multiple materials content,solving differential equation as well as querying materials ***,we summarize six challenges encountered for the use of GAI in materials science and provide the corresponding *** work paves the way for providing effective and explainable materials data generation and analysis approaches to accelerate the materials research and development.

关键词： Machine learning Artificial intelligence Generative artificial intelligence Materials science Novel materials discovery Deep learning

Anomalous Laterally Stressed Kinetically Trapped DNA Surface Conformations

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Nano-Micro Letters 2021年第8期13卷 263-280页

作者： Valery V.Prokhorov Nikolay A.Barinov Kirill A.Prusakov Evgeniy V.Dubrovin maxim D.Frank-Kamenetskii Dmitry V.Klinov Federal Research and Clinical Center of Physical-Chemical Medicine Malaya Pirogovskaya1aMoscow 119435Russian Federation A.N.Frumkin Institute of Physical Chemistry and Electrochemistry RASLeninsky prospect Moscow 199071 Russian Federation 3 Moscow Institute of Physics and TechnologyInstitutskiy per.9Dolgoprudny141700 MoscowRussian Federation Lomonosov Moscow State University Leninskie gory1-2Moscow 119991Russian Federation Department of Biomedical Engineering Boston University44 Cummington MallBoston MA02215USA

Up to now,the DNA molecule adsorbed on a surface was believed to always preserve its native *** belief implies a negligible contribution of lateral surface forces during and after DNA adsorption although their impact has never been ***-resolution atomic force microscopy was used to observe that stiff DNA molecules kinetically trapped on monomolecular films comprising one-dimensional periodically charged lamellar templates as a single layer or as a sublayer are oversaturated by sharp discontinuous kinks and can also be locally melted and *** argue that kink/anti-kink pairs are induced by an overcritical lateral bending stress(>30 pNnm)inevitable for the highly anisotropic 1D-1D electrostatic interaction of DNA and underlying rows of positive surface *** addition,the unexpected kink-inducing mechanical instability in the shape of the template-directed DNA confined between the positively charged lamellar sides is observed indicating the strong impact of *** previously reported anomalously low values of the persistence length of the surface-adsorbed DNA are explained by the impact of the surface-induced low-scale *** sites of the local melting and supercoiling are convincingly introduced as other lateral stress-induced structural DNA anomalies by establishing a link with DNA high-force *** results open up the study in the completely unexplored area of the principally anomalous kinetically trapped DNA surface conformations in which the DNA local mechanical response to the surface-induced spatially modulated lateral electrostatic stress is essentially *** underlying rich and complex in-plane nonlinear physics acts at the nanoscale beyond the scope of applicability of the worm-like chain approximation.

关键词： DNA surface conformations Kinetic trapping Lateral stress Periodically charged surface DNA kinks