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Observation of magnetic domain evolution in constrained epitaxial Ni–Mn–Ga thin films on MgO(0 0 1) substrate

Journal of materials science & Technology 2022年第7期102卷 56-65页

作者： Bo Yang Ivan Soldatov Fenghua Chen Yudong Zhang Zongbin Li Haile Yan Rudolf Schäfer Dunhui Wang Claude Esling Xiang Zhao Liang Zuo Key Laboratory for Anisotropy and Texture of Materials(Ministry of Education) School of Material Science and EngineeringNortheastern UniversityShenyang 110819China Institute for Metallic Materials Leibniz Institute for Solid State and Materials Research(IFW)DresdenHelmholtzstrasse 2001069 DresdenGermany Institute of Natural Sciences Ural Federal University620002 EkaterinburgRussia Department of Physics School of Applied ScienceTaiyuan University of Science and TechnologyTaiyuan 030024China Laboratoire d’Étude des Microstructures et de Mécanique des Matériaux(LEM3) CNRS UMR 7239Universitéde Lorraine57045 MetzFrance Institute for Materials Science Dresden University of Technology01062 DresdenGermany National Laboratory of Solid State Microstructures and Jiangsu Key Laboratory for Nanotechnology and Collaborative Innovation Center of Advanced Microstructures Nanjing UniversityNanjing 210093China

Epitaxial Ni–Mn–Ga thin films have promising application potential in micro-electro-mechanical sensing and actuation systems. To date, large abrupt magnetization changes have been observed in some epitaxial Ni–Mn–Ga thin films, but their origin-either from magnetically induced martensite variant reorientation(MIR) or magnetic domain evolution-has been discussed controversially. In the present work, we investigated the evolutions of the magnetic domain and microstructure of a typical epitaxial Ni–Mn–Ga thin film through wide-field magneto-optical Kerr-microscopy. It is demonstrated that the abrupt magnetization changes in the hysteresis loops should be attributed to the magnetic domain evolution instead of the MIR.

关键词： Ni–Mn–Ga thin films Magnetic field-induced variant reorientation Magnetic domains Magnetization process Magneto-optical Kerr microscopy

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Gas-phase synthesis of Ti_(2)CCl_(2) enables an efficient catalyst for lithiumsulfur batteries

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The Innovation 2024年第1期5卷 33-40页

作者： Maoqiao Xiang Zihan Shen Jie Zheng Miao Song Qiya He Yafeng Yang Jiuyi Zhu Yuqi Geng Fen Yue Qinghua Dong Yu Ge Rui Wang Jiake Wei Weiliang Wang Haiming Huang Huigang Zhang Qingshan Zhu Chuanfang John Zhang State Key Laboratory of Multiphase Complex Systems Institute of Process EngineeringChinese Academy of SciencesBeijing 100190China School of Chemical Engineering University of the Chinese Academy of SciencesBeijing 100049China Innovation Academy for Green Manufacture Chinese Academy of SciencesBeijing 100190China China Nuclear Power Engineering Co. Ltd.117 West Third Ring RoadNorth SectionBeijing 100840China College of Materials Science&Engineering Sichuan UniversityChengdu 610065China State Key Laboratory of Catalysis Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023China School of Physics Guangdong Province Key Laboratory of Display Material and TechnologyCenter for Neutron Science and TechnologySun Yat-sen UniversityGuangzhou 510275China Solid State Physics&Material Research Laboratory School of Physics and Materials ScienceGuangzhou UniversityGuangzhou 510006China

MXenes have aroused intensive enthusiasm because of their exotic properties and promising ***,to date,they are usually synthesized by etching *** synthetic technologies provides more opportunities for innovation and may extend unexplored ***,we report a bottom-up gas-phase synthesis of Cl-terminated MXene(Ti_(2)CCl_(2)).The gas-phase synthesis endows Ti_(2)CCl_(2) with unique surface chemistry,high phase purity,and excellent metallic conductivity,which can be used to accelerate polysulfide conversion kinetics and dramatically prolong the cyclability of Li-S ***-depth mechanistic analysis deciphers the origin of the formation of Ti_(2)CCl_(2) and offers a paradigm for tuning MXene chemical vapor *** brief,the gas-phase synthesis transforms the synthesis of MXenes and unlocks the hardly achieved potentials of MXenes.

关键词： synthesis phase lithium

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Fiber-pigtailed Quantum Dot Hybrid Circular Bragg Gratings

Fiber-pigtailed Quantum Dot Hybrid Circular Bragg Gratings

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Quantum 2.0, QUANTUM 2024 in Quantum 2.0 Conference and Exhibition

作者： Rickert, Lucas Vajner, Daniel Helversen, Martin V. Schall, Johannes Rodt, Sven Reitzenstein, Stephan Zolnac, Kinga Musial, Anna Sek, Grzegorz Li, Shulun Niu, Zhichuan Heindel, Tobias Institute of Solid State Physics Technical University Berlin Hardenbergstraße 36 Berlin10623 Germany Department of Optics and Photonics Wroclaw University of Science and Technology Wroclaw Poland Department of Experimental Physics Wroclaw University of Science and Technology Wroclaw Poland State Key Laboratory for Superlattices and Microstructures Institute of Semiconductors Chinese Academy of Sciences Beijing100083 China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of Sciences Beijing100049 China

We report on the deterministic fabrication of high-performance hybrid circular Bragg gratings (hCBGs) with embedded InAs/GaAs quantum dots and their direct and permanent fiber-pigtailing to single mode fibers. The dev... 详细信息

ISBN: (纸本)9781557525185

关键词： Semiconductor quantum dots

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Synthesis and optical properties of novel Gd^(3+)-doped BaZn_(2)(PO_(4))_(2)glass-ceramics for radiation detection applications

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Journal of Rare Earths 2022年第12期40卷 1927-1934,I0005页

作者： Wanli Li Zhaoyang Chen Jie Xu Pengjun Zhao Yanwei Fan Chengfa He Key Laboratory of Functional Materials and Devices for Special Environments of CAS Xinjiang Key Laboratory of Electronic Information Materials and DevicesXinjiang Technical Institute of Physics&Chemistry of CASUrumqi 830011China University of Chinese Academy of Sciences Beijing 100049China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China Laboratory of Solid-State Radiation Physics Urumqi 830011China

45 P_(2)O_(5)-15 BaO-25 ZnO-15 B2O_(3)glasses doped with different concentrations(0 mol%,0.1 mol%,0.25 mol%,0.5 mol%,and 0.75 mol%)of Gd^(3+)were prepared by a melt-quenching method and treated to fabricate glass-ceramics containing BaZn_(2)(PO_(4))_(2)crystals by controllable *** structural,optical,and dosimetric properties were *** spectra indicate that the glasses are composed of[PO_(4)],[BO_(3)],and[BO_(4)]basic structural *** XRD pattern analysis indicates that the samples contain BaZn_(2)(PO_(4))_(2)*** the photoluminesce nce(PL)spectra,two emission bands are observed at 307 and 313 nm due to the^(6)P_(5/2)→^(8)S_(7/2)and^(6)P_(7/2)→^(8)S_(7/2)transitions of Gd^(3+),*** OSL dosimetric properties of glass-ceramics were studied further under beta radiation *** optimal Gd^(3+)doping concentration of 0.5 mol%was *** fading of the OSL signal shows that the CW-OSL signal of Gd^(3+)-doped BaZn_(2)(PO_(4))_(2)glass-ceramics decays by about 58.95%within120 h,and the intensity remains stable *** thermoluminescence(TL)curve has three peaks at 164,240,and 344℃.Minimum detectable dose(MDD)of the 0.5 mol%Gd^(3+)-doped BaZn_(2)(PO_(4))_(2)glass-ceramics was calculated as 0.675 *** samples also exhibit good signal reusability and a broad linear dose-response range(0.3-500 Gy).Results show the excellent dosimetric properties of Gd^(3+)-doped BaZn_(2)(PO_(4))_(2)glass-ceramics and their potential application in radiation dosimetry.

关键词： Glass-ceramics Photoluminescence Continuous wave-optically stimulated luminescence Thermoluminescence Radiation dosimetry Rare earths

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Symmetry-driven anisotropic coupling effect in antiferromagnetic topological insulator: Mechanism for a quantum anomalous Hall state with a high Chern number

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Physical Review B 2024年第3期110卷 035139-035139页

作者： Yiliang Fan Huaiqiang Wang Peizhe Tang Shuichi Murakami Xiangang Wan Haijun Zhang Dingyu Xing National Laboratory of Solid State Microstructures and School of Physics School of Physics and Technology School of Materials Science and Engineering Max Planck Institute for the Structure and Dynamics of Matter Center for Free Electron Laser Science Hamburg 22761 Germany Department of Physics Collaborative Innovation Center of Advanced Microstructures

Antiferromagnetic (AFM) topological insulators (TIs), which host magnetically gapped Dirac-cone surface states and exhibit many exotic physical phenomena, have attracted great attention. Here, we find that the coupled surface states can be intertwined to give birth to a set of 2n unique new Dirac cones, dubbed intertwined Dirac cones, through the anisotropic coupling enforced by crystalline n-fold (n=2,3,4,6) rotation symmetry Cnz in the presence of a PT-symmetry breaking potential, for example, an electric field. Interestingly, we also find that the warping effect further drives the intertwined Dirac-cone state into a quantum anomalous Hall phase with a high Chern number (C=n). Then, based on first-principles calculations, we have explicitly demonstrated six intertwined Dirac cones and a Chern insulating phase with a high Chern number (C=3) in MnBi2Te4/(Bi2Te3)m/MnBi2Te4 heterostructures, as well as the C=2 and C=4 phases in HgS and α−Ag2Te films, respectively. This work discovers the intertwined Dirac-cone state in AFM TI thin films, which reveals a mechanism for designing the quantum anomalous Hall state with a high Chern number and also paves a way for studying highly tunable high-Chen-number flat bands of twistronics.

关键词： Surface states Multilayer thin films Topological materials

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Reactant enrichment in hollow void of Pt NPs@MnOx nanoreactors for boosting hydrogenation performance

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National science Review 2023年第10期10卷 114-122页

作者： Yanfu Ma Liwei Wang Wantong Zhao Tianyi Liu Haitao Li Wenhao Luo Qike Jiang Wei Liu Qihua Yang Jun Huang Riguang Zhang Jian Liu G.Q.Max Lu Can Li State Key Laboratory of Catalysis Dalian Institute of Chemical Physics (DICP)Chinese Academy of Sciences Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of Sciences State Key Laboratory of Clean and Efficient Coal Utilization Taiyuan University of Technology DICP-Surrey Joint Centre for Future Materials Department of Chemical and Process EngineeringUniversity of Surrey CAS Key Laboratory of Science and Technology on Applied Catalysis Dalian Institute of Chemical Physics Chinese Academy of Sciences School of Chemistry and Chemical Engineering Inner Mongolia University Division of Energy Research Resources Dalian National Laboratory for Clean Energy Dalian Institute of Chemical Physics Chinese Academyof Sciences Key Laboratory of the Ministry of Education for Advanced Catalysis Materials Zhejiang Key Laboratory for Reactive Chemistry on Solid Surfaces Institute of Physical ChemistryZhejiang Normal University Laboratory for Catalysis Engineering School of Chemical and Biomolecular Engineering Sydney Nano Institute The University of Sydney University of Surrey

In confined mesoscopic spaces,the unraveling of a catalytic mechanism with complex mass transfer and adsorption processes such as reactant enrichment is a great *** this study,a hollow nanoarchitecture of MnOx-encapsulated Pt nanoparticles was designed as a nanoreactor to investigate the reactant enrichment in a mesoscopic hollow *** employing advanced characterization techniques,we found that the reactant-enrichment behavior is derived from directional diffusion of the reactant driven through the local concentration gradient and this increased the amount of *** experimental results with density functional theory calculations,the superior cinnamyl alcohol（COL）selectivity originates from the selective adsorption of cinnamaldehyde（CAL） and the rapid formation and desorption of COL in the *** superb performance of 95% CAL conversion and 95% COL selectivity is obtained at only 0.5 MPa H2and 40 *** findings showcase that a rationally designed nanoreactor co uld boost catalytic performance in chemoselective hydrogenation,which can be of great aid and potential in various application scenarios.

关键词： reactant enrichment nanoreactor effect selective hydrogenation hollow nanostructure mesoporous materials

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Freestanding MXene-based macroforms for electrochemical energy storage applications

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SusMat 2023年第4期3卷 471-497页

作者： Qiongqiong Lu Congcong Liu Yirong Zhao Wengao Pan Kun Xie Pengfei Yue Guoshang Zhang Ahmad Omar Lixiang Liu Minghao Yu Daria Mikhailova Institute of Materials Henan Key Laboratory of Advanced Conductor MaterialsHenan Academy of SciencesZhengzhouHenanChina Leibniz Institute for Solid State and Materials Research(IFW)Dresden e.V. DresdenGermany School of Physical Science and Technology Lanzhou UniversityLanzhouChina School of Engineering Westlake UniversityHangzhouZhejiangChina Faculty of Chemistry and Food Chemistry&Center for Advancing Electronics Dresden Technische Universität DresdenDresdenGermany

Freestanding MXene-based macroforms have gained significant attention as versatile components in electrochemical energy storage applications owing to their interconnected conductive network,strong mechanical strength,and customizable surface chemistries derived from MXene *** comprehensive review article encompasses key aspects related to the synthesis of MXene nanosheets,strategies for structure design and surface medication,surface modification,and the diverse fabrication methods employed to create freestanding MXene-based macroform *** review also delves into the recent advancements in utilizing freestanding MXene macroforms for electrochemical energy storage applications,offering a detailed discussion on the significant progress achieved thus ***,the correlation between the macroform’s structural attributes and its performance characteristics is thoroughly explored,shedding light on the critical factors influencing efficiency and *** the remarkable development,the review also highlights the existing challenges and presents future perspectives for freestanding MXenebased macroforms in the realms of high-performance energy storage *** addressing these challenges and leveraging emerging opportunities,the potential of freestanding MXene-based macroforms can be harnessed to enable groundbreaking advancements in the field of energy storage.

关键词： batteries electrochemical energy storage freestanding macroforms MXenes supercapacitors

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Tribocorrosion properties of AISI 1045 and AISI 2205 steels in seawater: Synergistic interactions of wear and corrosion

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Friction 2021年第5期9卷 929-940页

作者： Beibei ZHANG Jianzhang WANG Hao LIU Yunfeng YAN Pengfei JIANG Fengyuan YAN State Key Laboratory of Solid Lubrication Lanzhou Institute of Chemical PhysicsChinese Academy of SciencesLanzhou 730000China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China

Tribocorrosion denotes an irreversible material degradation for several metallic components used in corrosive environments,and it arises from the interplay between chemical,mechanical,and electrochemical *** this study,some investigation has been performed to compare the tribocorrosion behavior of AISI 1045 steel and AISI 2205 duplex stainless steel sliding against an alumina pin in *** lowering in the open circuit potential(OCP)of AISI 2205 during the tribocorrosion demonstrates that its protective passive film was damaged by wear and resulted in a wear‐accelerated corrosion in the wear ***,sliding was found to accelerate the corrosion of the unworn areas for AISI 1045,leading to an anodic shift of the ***,the total material loss increased with an increase in the applied potential for both *** was revealed that AISI 1045 was more sensitive to corrosion under sliding than AISI ***,pure corrosion loss and corrosion‐induced wear constituted the primary reasons for the degradation of AISI 1045 at applied anodic potentials.

关键词： tribocorrosion passivation synergistic effect seawater

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Porous Microreactor Chip for Photocatalytic Seawater Splitting over 300 Hours at Atmospheric Pressure

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Nano-Micro Letters 2025年第8期 259-271页

作者： Desheng Zhu Zhipeng Dong Chengmei Zhong Junhong Zhang Qi Chen Ni Yin Wencheng Jia Xiong Zheng Fengzai Lv Zhong Chen Zhenchao Dong Wencai Huang Department of Electronic Engineering School of Electronic Science and TechnologyXiamen University Fuzhou Fuzhi Photocatalysis Research Center i-Lab CAS Key Laboratory of Nanophotonic Materials and DevicesSuzhou Institute of Nano-Tech and Nano-BionicsChinese Academy of Sciences State Key Laboratory of Physical Chemistry of Solid Surfaces Xiamen University Hefei National Research Center for Physical Sciences at the Microscale and CAS Center for Excellence in Quantum Information and Quantum Physics University of Science and Technology of China

Photocatalytic seawater splitting is an attractive way for producing green hydrogen. Significant progresses have been made recently in catalytic efficiencies, but the activity of catalysts can only maintain stable for about 10 h. Here, we develop a vacancy-engineered Ag3PO4/Cd S porous microreactor chip photocatalyst, operating in seawater with a performance stability exceeding 300 h. This is achieved by the establishment of both catalytic selectivity for impurity ions and tailored interactions between vacancies and sulfur species. Efficient transport of carriers with strong redox ability is ensured by forming a heterojunction within a space charge region, where the visualization of potential distribution confirms the key design concept of our chip. Moreover, the separation of oxidation and reduction reactions in space inhibits the reverse recombination, making the chip capable of working at atmospheric pressure. Consequently, in the presence of Pt co-catalysts, a high solar-to-hydrogen efficiency of 0.81% can be achieved in the whole durability test. When using a fully solar-driven 256 cm2hydrogen production prototype, a H2evolution rate of 68.01 mmol h-1m-2can be achieved under outdoor insolation. Our findings provide a novel approach to achieve high selectivity, and demonstrate an efficient and scalable prototype suitable for practical solar H2production.

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Charge storage coating based triboelectric nanogenerator and its applications in self-powered anticorrosion and antifouling

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Frontiers of materials science 2023年第1期17卷 163-173页

作者： Zhitao Zhang Yupeng Liu Min Feng Nannan Wang Changhe Du Shu Peng Yufei Guo Yongjian Liu Ying Liu Daoai Wang Institute of Materials Science and Engineering Ocean University of ChinaQingdao 266100China Center of Materials Sciences and Opto-Electronic Technology University of Chinese Academy of SciencesBejing 100049China State Key Laboratory of Solid Lubrication Lanzhou Institute of Chemical PhysicsChinese Academy of SciencesLanzhou730000China QingdaoCenter ofResourceChemistry and NewMaterials Qingdao266100China Institute of Sustainability for Chemicals Energy and Environment(ISCE2)A*STARSingapore 138634Singapore

As a novel energy-harvesting device,a triboelectric nanogenerator(TENG)can harvest almost all mechanical energy and transform it into electrical energy,but its output is *** the micro-nano structures of triboelectrode surfaces can improve their output efficiency,they lead to high costs and are not suitable for large-scale *** address this problem,we developed a novel TENG coating with charge-storage *** this study,we modified an acrylic resin,a friction material,with nano-BaTiO_(3) particles and gas phase *** charge-trapping ability of nanoparticles was used to improve the output of *** short-circuit current and the output voltage of coating-based TENGs featuring charge storage and electrification reached 15μA and 800 V,respectively,without decay for longtime *** this basis,self-powered anticorrosion and antifouling systems are designed to reduce the open circuit potential of A3 steel by 510 mV and reduce the adhesion rate of algae on the surface of metal *** study presents a high-output,stable,coating-based TENG with potential in practical applications for anticorrosion and antifouling.

关键词： triboelectric nanogenerator charge-trapping anticorrosion antifouling

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