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Spin-glass behavior in the competing CoCrGaO_(4)cubic spinel system

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Nano Research 2025年第1期18卷 501-507页

作者： Jiyu Hu Jiangli Ni Zhenfa Zi Chaocheng Liu School of Physics and Materials Engineering Hefei Normal UniversityHefei 230009China national synchrotron radiation laboratory University of Science and Technology of ChinaHefei 230026China

Spin glasses(SGs),generally defined as disordered systems with randomized competing interactions,are widely investigated complex *** the ground states of spin glasses is crucial for understanding the nature of disordered magnets and many other physical manifestations,while also helping to solve some hard combinatorial optimization problems across multiple ***,the intrinsic cause of SG has always been elusive,especially in spinel oxide ***,we report the SG behavior observed in the cubic spinel oxides CoCrGaO_(4),and provide a comprehensive understanding of its intrinsic *** results indicate a frustrated state under multi-magnetic competition,and the features of SG are confirmed by susceptibility *** fitting parameters ofτ0,T0,and zv of isothermal remanent magnetization further reveal the relaxation behavior and strong spin ***,the varying exchange coupling under different temperatures and magnetic fields is unveiled,which should be responsible for the disordered *** studies unravel the underlying mechanism responsible for doping-induced magnetic frustration and introduce CoCrGaO_(4)as a potential platform for investigating spin glass behavior,thereby advancing fundamental research on frustrated magnetism within the spinel system.

关键词： spin glass(SG) magnetic frustration magnetic competition spinel ferrites

A novel Li-ion based transistor within LiCoO2/Li6.75La3Zr1.5Ta0.5O12/Ag scheme

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Progress in Natural science:Materials International 2025年第01期 194-200页

作者： Jixiang Yin Houning Song Peirong Li Yuzhi Xing Supeng Chen Qi Liang Yu Feng Dong Yang Wenxiao Zhao Dong Wang Qinghao Li Pengfei Yu Qiang Li Xiaosong Liu Yanxue Chen College of Physics Qingdao University School of Physics State Key Laboratory of Crystal Materials Shandong University Center for Transformative science ShanghaiTech University national synchrotron radiation laboratory University of Science and Technology of China

Traditional electronic devices are reaching their physical limits as they shrink in size to improve integration. Solid ionic devices have become promising candidate to avoid tunneling effect and address these constraints, but the response time are typically sluggish. In recent years, the rapid development of solid electrolyte and solid-state battery provide superior choices to overcome limitations in ion transport. In this work, we construct an ionic transistor within Ag/LiCoO2/Li6.75La3Zr1.5Ta0.5O12（LLZTO）/Ag structure. LiCoO2serves as the channel layer of the transistor, with LLZTO acting as the electrolyte to isolate electrons and facilitate ion conduction, and Ag as the gate/anode. XRD, Raman spectroscopy, and electrochemical characterization confirm lithiation and *** characterization demonstrates the continuous resistive switching of the LiCoO2channel layer between high and low resistive states under pulsed gate voltage control, exhibiting high reversibility and long cycle stability. By combining X-ray absorption spectroscopy（XAS） and X-ray emission spectroscopy（XES）, the transition between high and low resistive states can be well clarified by a first-order Mott transition scheme. These results provide new perspectives for performance improvement and further development of ionic devices.

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Mainchain conformation ordering self-assembly tailored room temperature phosphorescence emission

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science china Chemistry 2025年第1期68卷 329-336页

作者： Yuzhu Li Yumeng Gao Feng Tian Yu Wang Yuan Yao Shaoliang Lin Xiang Ma Binbin Xu Shanghai Key laboratory of Advanced Polymeric Materials Key Laboratory for Ultrafine Materials of Ministry of EducationSchool of Materials Science and EngineeringEast China University of Science and TechnologyShanghai 200237China Key laboratory for Advance Materials and Feringa Noble Prize Scientist Joint Research Centre Frontiers Science for Materiobiology and Dynamic ChemistrySchool of Chemistry and Molecular EngineeringEast China University of Science&TechnologyShanghai 200237China Shanghai synchrotron radiation Facility Shanghai Advanced Research InstituteChinese Academy of SciencesShanghai 201204China

Developing organic room-temperature phosphorescence(RTP)materials with a wide range of tunable-emission is significant in expanding the applications of RTP ***,we rationally designed amphiphilic alternating copolymers poly(1,2-bis(4-alkoxyphenyl)ethane-1,2-dione-alt-(ethylene glycol)x)(P(Bz-alt-EGx))that combined the advantage of alternating benzil and EGxskeleton,and tunable mainchain *** a mainchain conformation ordering assembly(COA)process,P(Bz-alt-EGx)self-assembled into well-defined platelets,and such assemblies emitted blue RTP at ca.425 nm due to the ordered folded-chain conformation and confined *** contrast,traditional self-assembly(TA)of P(Bz-alt-EGx)obtained less ordered aggregates,such as asymmetric worms,vesicles,and rod-like *** resultant less ordered aggregates exhibited yellow-green RTP at ca.550 *** wide-tuning RTP emission in solution(between blue and yellow-green,over125 nm)is realized using the P(Bz-alt-EG_(x))alternating copolymers under the treatment of different self-assembly *** study uncovers a new strategy to tailor the RTP emission through different self-assembly pathways and holds great promise for the fabrication of advanced optical materials.

关键词： self-assembly conformation ordering alternating copolymer phosphorescence emission

“Slope-adsorption&plateau-pore filling”mechanism unlocking the potential of hard carbon anodes for“fast-charging&large-sized”batteries

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science china Materials 2025年第1期68卷 309-311页

作者： Tian Liang Xiaoming Zhu Hubei Key laboratory of radiation Chemistry and Functional Materials School of Nuclear Technology and Chemistry&BiologyHubei University of Science and TechnologyXianning 437100China

To date,there has been no report on fast-charging and Ahlevel sodium-ion batteries(SIBs)by utilizing thick hard carbon anodes that demonstrate prolonged cycling life and high areal capacity at high ***,the relationship among the complex structure of hard carbon,storage mechanism,and fastcharging performance in alkali-metal ion batteries has been a subject of ongoing debate[1,2].

关键词： mechanism charging utilizing

Electronic modulation induced by coupling RuO2 with electron-donating Co3O4 for high-active and long-life rechargeable Zn-air batteries

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Journal of Energy Chemistry 2025年第2期101卷 99-109页

作者： Xuena Ma Zhangxin Xu Mingyang Liu Panzhe Qiao Qi Li Ruihong Wang Baojiang Jiang Key laboratory of Functional Inorganic Material Chemistry Ministry of Education of the People's Republic of China School of Chemistry and Materials ScienceHeilongjiang University Shanghai synchrotron radiation Facility Shanghai Advanced Research Institute Chinese Academy of Sciences

Electronic-state modulation strategy offers great potential in designing RuO2-based bifunctionalelectrocatalysts for rechargeable Zn-air batteries（ZABs）.Various three-dimensional（3D） transition metal oxides are attempted to couple with RuO2for constructing an appropriate Ru—O—M *** work aims to construct Co3O4-RuO2heterostructures on carbon sheets（Co3O4/RuO2/NCNS） for boosting electronic transfer and *** and theoretical calculations identify the electronic transfer from Co3O4to RuO2that modulates the electronic structure of metal surfaces/***,it leads to the increase in Co3+content,electron-rich state at RuO2surface and electronic accumulation at ***,this electronic-state modulation optimizes the d-band center in Co3O4/RuO2that lowers the reaction barriers and endows interfaces as the biggest contributor to oxygen reduction reaction（ORR） and oxygen evolution reaction（OER） performance,The Co3O4/RuO2/NCNS shows a quite low potential difference of 0.62 V and remarkable durability for ORR/***3O4/RuO2/NCNS-assembled ZABs exhibit an excellent specific capacity of 818.3 mA h g-1and a superior lifespan over 750 h.

关键词： Charge-discharge stability Co3O4-RuO2 heterostructure Electronic modulation Reaction energy barrier Zn-air battery

Study on the radiation Synthesis Mechanism and the Electrochemical Property of Polyaniline

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Chinese Journal of Polymer science 2025年第2期43卷 328-340页

作者： Shuo Yan Zi-Fang Guo Zhi-Qing Ge Bao-Ying Zhang Ya-Ru Zhang Yi-Shao Li Mo-Zhen Wang Xue-Wu Ge State Key laboratory of Precision and Intelligent Chemistry Department of Polymer Science and EngineeringUniversity of Science and Technology of ChinaHefei230026China School of Nuclear science and technology University of Science and Technology of ChinaHefei230026China

As a highly promising conductive polymer material,the synthesis method,structure regulation,and performance improvement of polyaniline(PANI)are hot research *** this work,the radiation-induced polymerization of aniline in HNO_(3)solution was successfully achieved at room temperature without the use of chemical *** the analysis of the radiation chemical reactions of inorganic acids and nitrate salt solutions,the characterization of the intermediate free radicals in the irradiated systems,and the influence of the pH of the solutions on the polymerization activity and product morphologies,the radiation-induced polymerization mechanism of aniline is discussed in detail and *** at a condition of[HNO_(3)]>[aniline],i.e.,pHradiation,which means that the molecular chain structure of the radiation-synthesized PANI can be regulated by pH,nitrate concentration,and irradiation ***-synthesized PANI has a moderate protonation and oxidation state,which can be used for the preparation of PANI supercapacitors with better electrochemical properties than those prepared by chemical oxidation under the same *** work presents a new radiation-synthesis method and polymerization mechanism of PANI,which not only expands the application of radiation technique in the field of polymer synthesis,but also provides a new idea for the structural regulation and electrochemical property optimization of PANI.

关键词： Aniline radiation-induced polymerization Polyaniline Electrochemical property

Simulations of electron zebra stripes in the inner radiation belt using a composite empirical electric field model

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science china Earth sciences 2025年第1期68卷 27-38页

作者： Ziyang WANG Ying LIU Qiugang ZONG Hong ZOU Yuguang YE Xuzhi ZHOU Chao YUE Shan WANG Institute of Space Physics and Applied technology Peking UniversityBeijing100871China State Key laboratory of Lunar and Planetary science Macao University of Science and TechnologyMacao999078China

The phenomenon termed“zebra stripes”manifests as regular patterns in the energy-space(L shell)spectrum of energetic electrons(ranging from tens to hundreds ke V)within the inner radiation *** structures exhibit drift-periodic behavior and commonly arise from large-scale electric field perturbations near the substorm *** this study,we introduce a composite electric field model and replicate the formation,structure,and evolution of zebra stripes using a bounce-averaged test particle code under this electric field ***-resolution measurements of energetic electrons obtained from the Van Allen Probes and the recently launched Macao science Satellites-1 are used as initial conditions and served to validate our test particle *** analyses between observed data and simulations demonstrate our test particle method's efficacy in capturing zebra stripes'general ***,the composite model proves capable of reproducing realistic variations in the electric field within the inner radiation belt to a certain ***,subtle differences emerge in the flux strength and the positions of *** disparities primarily stem from limitations inherent in the electric field model and the initial conditions of the *** that the model represents an average case,it is conceivable that real-world scenarios may deviate from the average,thereby introducing variations in the observed phenomena.

关键词： Zebra stripes Inner radiation belt Large-scale electric fields Van Allen Probes Macao science Satellite

Revolutionizing photothermal CO_(2)hydrogenation with ceria-based catalysts

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Nano Research 2025年第1期18卷 30-49页

作者： Zhaorui Zhang Xiao Han Junhong Zhang Yunyun Dong Jinsheng Zhao Qian Xu Ningqiang Zhang School of Chemistry and Chemical Engineering Liaocheng UniversityLiaocheng 252059China Institute for Catalysis Hokkaido UniversityN-21W-10Sapporo 001-0021Japan national synchrotron radiation laboratory University of Science and Technology of ChinaHefei 230029China

In the context of achieving carbon neutrality,CO_(2)catalytic conversion technologies are effective in reducing atmospheric CO_(2)concentrations while simultaneously producing renewable *** approach is seen as a viable method for constructing a new carbon cycle,thereby effectively addressing the issue of global *** CO_(2)conversion has recently emerged as a promising research focus due to its high energy utilization efficiency,superior CO_(2)conversion,excellent product selectivity,mild operating conditions,low energy consumption and minimal operating *** oxide(CeO_(2))has been widely used in photothermal catalysis due to its unique chemical properties,particularly when used as a support material with supported metals,creating distinctive interfacial sites for catalytic *** an emerging star support in photothermal CO_(2)conversion,its contributions are equally significant and should not be ***,to our knowledge,there has been no comprehensive review of CeO_(2)applications in catalytic hydrogenation of CO_(2).In this paper,we summarize and discuss CeO_(2)-based materials for photothermal CO_(2)conversion to value-added *** research particularly focuses on the synthesis methods of CeO_(2)-supported catalysts,the history of CeO_(2)in photothermal catalysis,types of photothermal catalytic reactors,unique characterization methods for the photothermal catalysts and the photothermal CO_(2)hydrogenation reactions by CeO_(2)-based *** related to further challenges and future directions for photothermal CO_(2)hydrogenation are also provided.

关键词： CO_(2)neutrality hydrogenation photothermal catalysis ceria C1 chemistry

First observation results of Macao science Satellite-1 on lightning-induced electron precipitation

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science china Earth sciences 2025年第1期68卷 1-10页

作者： Yongping WANG Yixin SUN Qiugang ZONG Gaopeng LU Xudong GU Ze-Jun HU Bin LI Key laboratory for Polar science Ministry of Natural ResourcesPolar Research Institute of ChinaShanghai 200136China Institute of Space Physics and Applied technology Peking UniversityBeijing 100871China State Key laboratory of Lunar and Planetary science Macao University of Science and TechnologyMacao 999078China School of Earth and Space sciences University of Science and Technology of ChinaHefei 230026China School of Electronic Information Wuhan UniversityWuhan 430072China

The Medium-energy Electron Spectrometers(MES)is a space-borne instrument onboard Macao science Satellite-1(MSS-1)dedicated to monitoring the typical charged particle radiation characteristics in the satellite orbit and the process of their occurrence and development,including short bursts of lightning-induced electron precipitation(LEP).This paper presents the first results of the LEP measurements by the MSS-1.47 LEP events are identified with the routine operation for 3 months since satellite launch,all within the range of 1.5

关键词： Lightning-induced electron precipitation Inner radiation belts Energetic electrons Macao science Satellite-1