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Investigating the Effects of V2c MXene on Improving the Switching Stability and Reducing the Operation Voltages of TiO2-Based Memristors

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chinese Journal of Electronics 2024年第5期33卷 1181-1187页

作者： nan HE Lei WANG yi TONG college of Electronic and Optical engineering College of Flexible Electronics (Future Technology) and College of Integrated Circuit Science and Engineering Nanjing University of Posts and Telecommunications Gusu Laboratory of Materials

Three-atoms-type V2c MXene, an emerging class of transition metal carbides, has attracted tremendous attention in the fabrication of advanced memristive devices due to its excellent electrochemical properties. However,the inserted effects and corresponding physical mechanisms of inserting V2c on traditional TiO2-based memristors have not been clearly explored. In this work, exhaustive electrical characterizations of the V2c/TiO2-based devices exhibit enhanced performance（e.g., improved switching stability and lower operating voltages） compared to the TiO2-based counterparts. In addition, the advantaged influences of the inserted V2c have also been studied by means of first-principles calculations, confirming that V2c MXene enables controllable internal ionic process and facilitated formation mechanism of the Ag conductive filaments. This work demonstrates a way to combine experimental and theoretical investigations to reveal the positive effects of introducing V2c MXene on memristor, which is beneficial for fabricating performance-enhanced memristors.

关键词： Performance evaluation Fabrication Memristors Process control Metals Switches Stability analysis Memristor V2c MXene First-principles calculation Switching stability Formation mechanism

Photoinduced bismuth vanadate-catalyzed c(sp^(2))-H functionalization

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chinese chemical Letters 2024年第3期35卷 1-2页

作者： Rong-nan yi Wei-Min He Key Laboratory of Food&environment&Drug Monitoring and Testing of Universities in Hunan Province Hunan Police AcademyChangsha 410138China School of chemistry and chemical engineering University of South ChinaHengyang 421001China

Visible light-induced organic reactions have gained much attention in recent years due to their mild conditions and high effic.ency[1,2].In this context,many effic.ent photocatalysts including transition metal complex... 详细信息

关键词： bismuth catalyzed gained

Near real-time gravitational wave data analysis of the massive black hole binary with TianQin

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Sc.ence china(Physics,Mechanics & Astronomy) 2024年第7期67卷 175-186页

作者： Hong-Yu c.en Xiang-Yu Lyu en-Kun Li yi-Ming Hu MOE Key Laboratory of TianQin Mission TianQin Research Center for Gravitational Physics&School of Physics and AstronomyFrontiers Science Center for TianQinGravitational Wave Research Center of CNSASun Yat-sen University(Zhuhai Campus)Zhuhai 519082China

Space-borne gravitational wave(GW)detectors can detect the merger of massive black *** early warning and localization of GW events before merging can be used to inform electromagnetic telescopes and conduct multimessenger ***,this requires real-time data transmission and analysis *** geocentric orbit of the space-borne GW detector Tian Qin makes it possible to conduct real-time data *** this study,we develop a search and localization pipeline for massive black hole binaries(MBHBs)with Tian Qin under both regular and real-time data transmission *** demonstrate that,with real-time data transmission,MBHBs can be accurately localized on the *** the approaching merger,each analysis can be finished in only 40 *** an MBHB system at a distance of 1 Gpc,if we receive data every hour,then we can pinpoint its location to within less than 1 deg^(2)on the final day before the merger.

关键词： gravitational wave detectors and experiments black holes data analysis algorithms and implementation data management

Photocatalytic Minisci-type multicomponent reaction for the synthesis of 1-(halo)alkyl-3-heteroaryl bicyclo[1.1.1]pentanes

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chinese chemical Letters 2024年第10期35卷 32-34页

作者： Rong-nan yi Wei-Min He Key Laboratory of Food & environment & Drug Monitoring and Testing of Universities in Hunan Province Hunan Police Academy School of chemistry and chemical engineering University of South China

Bioisosteres play an important role in pharmaceutical and agri cultural compound design that has been developed to enhance the properties of *** a sp3-rich small ring cage hydro carbons,bicyclo[1.1.1]pentanes （BcPs） were commonly considered as a bioisostere of the para-substituted arenes,internal alkynes and tert–butyl groups,and its introduction can significantly im prove pharmacokinetic properties,including passive permeability aqueous solubility,metabolic stability[1].Over the past decades numerous pharmaceutically relevant molecules with biaryl frame works were improved by the approach of bioisosteric replacement conventional strategies for the synthesis of such BcP-aryls deriva tives mostly depend on the stepwise c–c formation via the di rect addition to bridgehead c–c bond of[1.1.1]propellane to pro vide active BcP-intermediates and followed by a second transition metal cross-coupling ***,these pioneer works were limited by the low step economy,the use of unstable reagents and harsh conditions in industrial ***,radical mediated one-step,multi-component reactions[2-6]for synthe sizing various BcP-aryl derivatives have made progress,although these strategies were limited to the prefunctionalized （het）arene and tertiary alkyl radicals[7].Therefore,it is of great significance to develop a method for diverse BcP-aryls that can be compatible with primary,secondary,tertiary radicals and direct c–H function alization of （het）arenes.

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Reveal more mechanisms of precondition mesenchymal stem cells inhibiting inflammation

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World Journal of Stem cells 2024年第4期16卷 459-461页

作者： yi Li Qian-Qian c.en en-Qiang Linghu Department of Gastroenterology First Medical Center of Chinese PLA General HospitalBeijing 100853China Department of Gastroenterology and Hepatology First Medical Center of Chinese PLA General HospitalBeijing 100853China

Hypoxia can get more ability to inhibit *** how it impact on survival time of mesenchymal stem cells(MScs)is confusing and how preconditioned MScs inhibiting inflammation are partially *** issues decided the value of ... 详细信息

关键词： Mesenchymal stem cell Hypoxia-inducible factor 1α Hypoxia Inflammation Macrophage

ZIF-8 modified by isocyanate as a photocatalytic antibacterial agent

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Rare Metals 2024年第6期43卷 2708-2718页

作者： yi-Ning Zhang Zhen Pei Zi-Hao Wang chong-en Wang Fen-Fen Liang Li-Qiao Wei college of Architecture Taiyuan University of TechnologyTaiyuan 030024China Key Laboratory of Interface Sc.ence and engineering in Advanced Materials of Taiyuan University of Technology Ministry of EducationTaiyuan 030024China Department of Materials Sc.ence and engineering Shanxi Institute of TechnologyYangquan 045000China Shanxi-Zheda Institute of Advanced Materials and chemical engineering Taiyuan 030000China

Zeolite imidazole skeleton(ZIF-8)is a promising option for self-cleaning of building exterior walls due to its large specific surface area,high antibacterial activity and low ***,it suffers from low antibacterial effic.ency and yield under visible light *** address the issues,we developed the photocatalytic materials T-ZIF-8-TDI(thermally treated-ZIF-8-toluene 2,4-diisocyanate)by modifying ZIF-8 with thermal oxygen sensitization and chemical *** results show that the yield of T-ZIF-8-TDI photocatalytic antibacterial agent is increased to 11.5 times of that of T-ZIF-8,while maintaining the crystal structure of T-ZIF-8 and thermal stability up to 60℃.Furthermore,T-ZIF-8-TDI exhibits extended optical response range to the nearinfrared region,significantly narrowed band gap,improved photogenerated elec tron-hole separation effic.ency,reduced recombination rate,and excellent photocatalytic *** the concentration of antibacterial agent is 600 mg·L^(-1),the antibacterial rate of Escherichia coli(***)reaches 99.99%irradiated by visible light for30 min,and when the concentration of antibacterial agent is 200 mg·L^(-1),the antibacterial rate of Staphylococcus aureus(***)reaches 99.99%irradiated by visible light for 25 *** also analyzed the reasons in detail from the aspects of bacterial species and antibacterial mechanism,and proposed the antibacterial mechanism of·O_(2)^(-)and h^(+)as the main active *** findings suggest that T-ZIF-8-TDI photocatalytic antibacterial agent has potential for use in self-cleaning of building exterior walls.

关键词： ZIF-8 Hot oxygen sensitization Modified by isocyanate Antimicrobial performance Photocatalytic antibacterial mechanism

Supramolecular polymer network constructed by a functionalized polyimidazolium salt derived from metal-carbene template approach

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Sc.ence china chemistry 2024年第4期67卷 1224-1228页

作者： Ming-Ming Gan Zi-en Zhang yi-Fan Zhang Heng Zhang Li-ying Sun ying-Feng Han Key Laboratory of Synthetic and Natural Functional Molecule chemistry of the Ministry of Education Xi’an Key Laboratory of Functional Supramolecular Structure and MaterialsCollege of Chemistry and Materials ScienceNorthwest UniversityXi’an 710127China

In this study,we present a supramolecular templating approach for constructing polyimidazolium salt containing crown ether and cyclobutane *** strategy involves the formation of metal-carbene templates,photochemical cycloaddition,and subsequent demetallation of metal *** by the host-guest chemistry between crown ether units and ammonium salts,we successfully fabricated a supramolecular polymer SPN1,which features imidazolium receptors and cyclobutane *** obtained SPN1 demonstrates outstanding reversible stimulus-response,antibacterial behavior and conductivity.

关键词： metal-carbene template crown ether polyimidazolium salt host-guest chemistry

Investigating the Effects of Vc MXene on Improving the Switching Stability and Reducing the Operation Voltages of TiO-Based Memristors

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chinese Journal of Electronics 2024年

作者： nan HE Lei WANG yi TONG college of Electronic and Optical engineering and College of Flexible Electronics (Future Technology) College of Integrated Circuit Science and Engineering Nanjing University of Posts and Telecommunications Gusu Laboratory of Materials

Three-atoms-type V2c MXene, an emerging class of transition metal carbides, has attracted tremendous attention in the fabrication of advanced memristive devices due to its excellent electrochemical properties. However, the inserted and behind physical effects of inserting V2c on traditional TiO2-based memristors have not been clearly explored. In this work, exhaustive electrical characterizations of the V2c/TiO2-based devices exhibit enhanced performance（e.g., improved switching stability and lower operating voltages） compared to the TiO2-based counterparts. In addition, the advantaged influences of the inserted V2c have also been studied by means of firstprinciples calculations, confirming that V2c MXene enables controllable internal ionic process and facilitated formation mechanism of the Ag conductive filaments. This work demonstrates a way to combine experimental and theoretical investigations to reveal the positive effects of introducing V2c MXene on memristor, which is beneficial for fabricating performance-enhanced memristors.

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On the Proper Holomorphic Mappings between Equidimensional Hartogs Domains over Hermitian Symmetric Manifolds

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Acta Mathematica Sinica,english Series 2024年第5期40卷 1215-1228页

作者： en chao BI School of Mathematics and Statistics Qingdao UniversityQingdao 266071P.R.China

In this paper,we study a family of Hartogs domains fibred over Hermitian symmetric manifolds being a unit ball in c^(m).The aim of the present study is to establish the rigidity results about proper holomorphic mappings between two equidimensional Hartogs domains over Hermitian symmetric *** particular,we can fully determine its biholomorphic equivalence and automorphism group.

关键词： Proper holomorphic mapping Hartogs domains Hermitian symmetric manifolds