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LiOH: A "double-edged" effect toward electrochemical oxidation of Li_(2)O_(2)

Journal of Energy Chemistry 2021年第6期30卷 401-405,I0010页

作者： Qinghua Cui Lipo Ma Peng Zhang Yuliang Cao Jiawei Wang Laboratory of Advanced Spectro-electrochemistry and Lithium-ion Batteries Dalian National Laboratory for Clean EnergyDalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023LiaoningChina State Key Laboratory of Electroanalytical Chemistry Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022JilinChina Department of Materials Science&Engineering Academy for Advanced Interdisciplinary StudiesShenzhen Key Laboratory of Solid State BatteriesGuangdong Provincial Key Laboratory of Energy Materials for Electric PowerSouthern University of Science and TechnologyShenzhen 518055GuangdongChina College of Chemistry and Molecular Sciences Engineering Research Center of Organosilicon Compounds&Materials of Ministry of EducationWuhan UniversityWuhan 430072HubeiChina Institute of Materials Engineering Beijing Institute of Collaborative InnovationBeijing 100094China

The aprotic lithium-oxygen battery(Li-O_(2) battery) has attracted much attraction for the future advanced battery technologies due to its ultra-high theoretical energy density that can well meet the ever-growing ener... 详细信息

关键词： Lithium-oxygen batteries LiOH-doped Li_(2)O_(2) Li_(2)O_(2)oxidation Differential electrochemical mass spectrometer Isotope-labelling

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Lattice dynamical properties and interatomic force constants of transition metal oxide perovskite superlattices

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Physical Review B 2024年第24期110卷 245302-245302页

作者： Xiao-Lin Chen Jin-Zhu Zhao Philippe Ghosez Guangdong Basic Research Center of Excellence for Structure and Fundamental Interactions of Matter Guangdong Provincial Key Laboratory of Quantum Engineering and Quantum Materials School of Physics South China Normal University Guangzhou 510006 People's Republic of China Guangdong-Hong Kong Joint Laboratory of Quantum Matter Frontier Research Institute for Physics South China Normal University Guangzhou 510006 People's Republic of China Center for Computational Science and Engineering Southern University of Science and Technology Shenzhen 518055 People's Republic of China National Laboratory of Solid State Microstructures Nanjing University Nanjing 210093 People's Republic of China Theoretical Materials Physics Q-MAT University of Liège B-4000 Sart Tilman Belgium

In this study, we investigate the construction of efficient model potentials for perovskite heterostructures by transferring relevant dynamic quantities from bulk systems and short-period superlattices. Through first-principles calculations, we provide a comprehensive analysis and comparison of the dynamical properties of different perovskite-based superlattice structures, including (PbTiO3)n/(SrTiO3)m superlattices, (ATiO3)n/(AO)2 superlattices, and An+1TinO3n+1 Ruddlesden-Popper phases, where A can be Sr, Ba, or Pb. We demonstrate that as the thickness of these structures increases, the dynamical properties of the perovskite blocks converge rapidly towards their bulk counterparts. We discuss this convergence in terms of phonon density of states in reciprocal space and interatomic force constants in real space. Our findings suggest a straightforward strategy for developing transferable model potentials that accurately capture the dynamics of layered oxide compounds with progressively thicker layers.

关键词： Ferroelectricity First-principles calculations Lattice dynamics Phonons Dielectrics Ferroelectrics Superlattices Density functional theory

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Recent progresses on perovskite quantum dots patterning techniques for color conversion layer in micro-LED displays

Next Nanotechnology

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Next Nanotechnology 2024年 5卷

作者： Fan, Xiaotong Yang, Xiao Kong, Xuemin Zhang, Tianqi Wang, Shuli Lin, Yue Chen, Zhong Department of Electronic Science Fujian Engineering Research Center for Solid-State Lighting Xiamen University Fujian Xiamen 361005 China Innovation Laboratory for Sciences and Technologies of Energy Materials of Fujian Province (IKKEM) Fujian Xiamen 361005 China Institute of Electromagnetics and Acoustics School of Electronic Science and Engineering Xiamen University Fujian Xiamen 361005 China

Micro light-emitting diodes (micro-LEDs) are considered crucial for the next-generation display technology. However, the high cost of large-scale transfer technology and the lack of maturity in full-color technology have hindered the availability of mature products. The perovskite quantum dot (PQD) material offers a promising solution for achieving full-color capabilities in micro-LED displays. This review article aims to provide an overview on the latest progresses on PQD full-color technology for micro-LEDs. The review covers a variety of patterning techniques, including photolithography, inkjet printing, microfluidic processing, and laser processing, as well as the research on intrinsic stability of PQDs. Finally, the current drawbacks and solutions of PQD color conversion micro-LEDs are discussed, and the future research prospects in this field are anticipated. © 2024 The Authors

关键词： Color conversion layer Full-color display Micro-LED Patterning technique Perovskite quantum dot

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Ru Single Atoms and Sulfur Anions Dual-Doped NiFe Layered Double Hydroxides for High-Current-Density Alkaline Oxygen Evolution Reaction

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Advanced Energy materials 2025年第0期

作者： Zhu, Yiming Wang, Jiaao Weiser, Gregor Klingenhof, Malte Koketsu, Toshinari Liu, Shangheng Pi, Yecan Henkelman, Graeme Shi, Xinyue Li, Jiayi Pao, Chih-Wen Yeh, Min-Hsin Huang, Wei-Hsiang Strasser, Peter Ma, Jiwei Shanghai Key Laboratory for R&D and Application of Metallic Functional Materials Institute of New Energy for Vehicles School of Materials Science and Engineering Tongji University Shanghai201804 China Department of Chemistry and the Oden Institute for Computational Engineering and Sciences The University of Texas at Austin AustinTX78712-0165 United States Department of Chemistry Technische Universität Berlin Berlin10623 Germany State Key Laboratory of Physical Chemistry of Solid Surfaces College of Chemistry and Chemical Engineering Xiamen University Xiamen361005 China School of Chemistry and Chemical Engineering Yangzhou University Jiangsu225002 China National Synchrotron Radiation Research Center Hsinchu300092 Taiwan Center Department of Chemical Engineering National Taiwan University of Science and Technology Taipei10607 Taiwan

New anodic electrocatalysts with high performance and cost-effectiveness at large current densities help advance the emerging anion exchange membrane water electrolyzer (AEMWE) technology. To this end, a ruthenium (Ru) single atoms and sulfur (S) anions dual-doped NiFe layered double hydroxides (Ru-S-NiFe LDH) catalyst is reported with remarkably low alkaline oxygen evolution reaction (OER) overpotentials, high mass activities and prolonged stabilities at high current densities. Inspiringly, the AEMWE performance on Ru-S-NiFe LDH is also superior to the NiFe LDH. In-depth mechanism investigations reveal that Ru single atoms not only act as the highly active sites, but also facilitate the conductivity of NiFe LDH. Meanwhile, S anions accelerate the electrochemical reconstruction of NiFe LDH to OER-active NiFeOOH and alleviate the over-oxidation issue on Ru active sites. Benefiting from these, Ru-S-NiFe LDH shows significantly enhanced OER activity and stability. Theoretical calculations further validate the decreased OER free energy difference brought about by the Ru single atoms and S anions dual-doping. This study offers a proof-of-concept that the noble metal single atoms and anions dual-doping is a feasible strategy to construct the promising 3d transition metal-based electrocatalysts toward the practical alkaline water electrolyzer. © 2025 The Author(s). Advanced Energy materials published by Wiley-VCH GmbH.

关键词： Cost effectiveness

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An efficient route to prepare suspended monolayer for feasible optical and electronic characterizations of two-dimensional materials

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InfoMat 2022年第2期4卷 126-138页

作者： Yuan Huang Yun-Kun Wang Xin-Yu Huang Guan-Hua Zhang Xu Han Yang Yang Yunan Gao Lei Meng Yushu Wang Guang-Zhou Geng Li-Wei Liu Lin Zhao Zhi-Hai Cheng Xin-Feng Liu Ze-Feng Ren Hui-Xia Yang Yufeng Hao Hong-Jun Gao Xing-Jiang Zhou Wei Ji Ye-Liang Wang Advanced Research Institute of Multidisciplinary Science Beijing Institute of TechnologyBeijingChina Beijing National Laboratory for Condensed Matter Physics Institute of PhysicsChinese Academy of SciencesBeijingChina Songshan Lake Materials Laboratory DongguanChina State Key Laboratory for Artificial Microstructure and Mesoscopic Physics School of PhysicsPeking UniversityBeijingChina Frontiers Science Center for Nanooptoelectronics&Collaborative Innovation Center of Quantum Matter BeijingChina State Key Laboratory of Molecular Reaction Dynamics Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalianChina Collaborative Innovation Center of Extreme Optics Shanxi UniversityTaiyuanChina Minzu University of China BeijingChina National Laboratory of Solid State Microstructures College of Engineering and Applied SciencesJiangsu Key Laboratory of Artificial Functional MaterialsCollaborative Innovation Center of Advanced MicrostructuresNanjing UniversityNanjingChina School of Information and Electronics MIIT Key Laboratory for Low-Dimensional Quantum Structure and DevicesBeijing Institute of TechnologyBeijingChina Department of Physics and Beijing Key Laboratory of Optoelectronic Functional Materials&Micro-Nano Devices Renmin University of ChinaBeijingChina National Center for Nanoscience and Technology(NCNST)of China BeijingChina Haian Institute of New Technology Nanjing UniversityHaianChina University of Chinese Academy of Sciences BeijingChina

Two-dimensional(2D)materials are highly sensitive to substrates,interfaces,and the surrounding *** 2D materials are free from substrate-induced effects,thus an ideal approach to study their intrinsic ***,it is very challenging to prepare large-area suspended 2D materials with high *** we report a universal method,based on pretreatments of densely patterned hole array substrates with either oxygenplasma or gold film deposition,to prepare large-area suspended mono-and few-layer 2D *** structural,optical,and electrical characterization tools were used to fully evaluate the improved performance of various suspended 2D *** of these observations reported in this study are:(1)Observation of a new Raman low frequency mode for the suspended MoS_(2);(2)Significantly stronger photoluminescence(PL)and second harmonic generation(SHG)signals of suspended WSe_(2),which enables the study of new optical transition processes;(3)The low energy electron diffraction pattern on suspended MoS_(2) also exhibits much sharper spots than that on the supported area;and(4)The mobility of suspended graphene device approaches 300000 cm^(2) V^(-1) s^(-1),which is desirable to explore the intrinsic properties of *** work provides an innovative and efficient route for fabricating suspended 2D materials,and we expect that it can be broadly used for studying intrinsic properties of 2D materials and in applications of hybrid active nanophotonic and electronic devices.

关键词： mechanical exfoliation photoluminescence Raman spectrum suspended 2D materials

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Fabrication of Cr-doped SrTiO3/Ti-dopedα-Fe_(2)O_(3) photoanodes with enhanced photoelectrochemical properties

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Journal of materials science & Technology 2020年第21期56卷 189-195页

作者： Dapeng Cao Jingbo Zhang Anchen Wang Xiaohui Yu Baoxiu Mi Key Laboratory for Organic Electronics&Information Displays(KLOEID) Jiangsu Engineering Centre for Plate Displays&Solid State Lightingand Institute of Advanced Materials(IAM)Nanjing University of Posts&TelecommunicationsNanjing 210023China Key Laboratory of Flexible Electronics Jiangsu National Synergetic Innovation Center for Advanced Materials(SICAM)School of Material Science and EngineeringNanjing University of Posts&TelecommunicationsNanjing 210023China

Cr-doped Sr TiO_(3)/Ti-dopedα-Fe_(2)O_(3) heterojunction has been constructed by an ingenious way,*** segregation titanium oxide on the surface of the Ti-dopedα-Fe_(2)O_(3) electrode to in situ prepare Cr-doped SrTiO_(3).After construction of the heterojunction,the photocurrent onset potential for water oxidation on a Ti4+dopedα-Fe_(2)O_(3) cathodically shifts by about 100 ***,the cathodic shift of the onset potential can be preserved well even after a long time *** results indicate the effectiveness and credibility of the fabricated *** order to make clear the reason for the onset potential shift,the asprepared Ti-dopedα-Fe_(2)O_(3) and Cr-doped SrTiO_(3)/Ti-dopedα-Fe_(2)O_(3) samples were investigated by X-ray photoelectron spectroscopy,electrochemical impedance spectroscopy,X-ray diffraction spectroscopy,*** on the experimental evidences,it is proposed that cathodic shift of the onset potential is mainly due to the enhanced charge separation at the photoanode *** strategy can offer a reference to construct heterojunction on other films especially for those with surface segregation.

关键词： Photoelectrochemical Water splitting α-Fe_(2)O_(3) Cr-doped SrTiO_(3) Heterojunction Charge separation

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Irradiation hardening behaviors of tungsten-potassium alloy studied by accelerated 3-MeV W^2+ ions

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Chinese Physics B 2020年第4期29卷 336-343页

作者： Xiao-Liang Yang Long-Qing Chen Wen-Bin Qiu Yang-Yi-Peng Song Yi Tang Xu-Dong Cui Chang-Song Liu Yan Jiang Tao Zhang Jun Tang Key Laboratory of Radiation Physics and Technology of Ministry of Education Institute of Nuclear Science and TechnologySichuan UniversityChengdu 610064China Sichuan Research Center of New Materials Institute of Chemical MaterialsChina Academy of Engineering PhysicsMianyang 621999China Key Laboratory of Materials Physics Institute of Solid State PhysicsChinese Academy of SciencesHefei 230031China

Tungsten-potassium(WK)alloy with ultrafine/fine grains and nano-K bubbles is fabricated through spark plasma sintering(SPS)and rolling *** this study,3-MeV W^2+ ion irradiation with a tandem accelerator is adopted to simulate the displacement damage caused by *** the depth of irradiation damage layer is limited to only 500 nm,the hardening behaviors of WK alloy and ITER(International Thermonuclear Experimental Reactor)-W under several damage levels are investigated through Bercovich tip nanoindentation test and other morphological *** indenter size effect(ISE),soft substrate effect(SSE),and damage gradient effect(DGE)are found to influence the measurement of *** or no pop-ins in irradiated samples are observed while visible pop-in events take place in unirradiated *** pile-up with different morphology features around the indentation exists in both WK and *** WK shows a smaller hardness increment than ITER-W under the same condition of displacement *** study provides beneficial information for WK alloy serving as a promising plasma facing materials(PFMs)candidate.

关键词： irradiation harden spark plasma sintering WK alloy nanoindentation

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Superatomic Aub clusters ligated by different N-heterocyclic carbenes and their ligand-dependent catalysis, photoluminescence, and proton sensitivity

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Nano research 2020年第7期13卷 1908-1911页

作者： Hui Shen Sijin Xiang Zhen Xu Chen Liu Xihua Li Cunfa Sun Shuichao Lin Boon K.Teo Nanfeng Zheng State Key Laboratory for Physical Chemistry of Solid Surfaces Collaborative Innovation Center of Chemistry for Energy MaterialsNational&Local Joint Engineering Research Center of Preparation Technology of NanomaterialsCollege of Chemistry and Chemical EngineeringXiamen UniversityXiamen 361005China School of Pharmaceutical Science Xiamen UniversityXiamen 361002China

We report herein a class of superatomic AU13 clusters stabilized by different N-heterocyclic carbenes(NHCs).The clusters show diverse metal surface structures,properties and functions as exemplified by:(1)the first anionic AU13 cluster[Au1g(NHC-1)sBr6],which has bulky NHC-1 ligands that lead to a rather open metal surface contributing to its high catalytic activity;(2)the tricationic cluster[Au13(NHC-2)sBr2]+which has bidentate,benzyl-rich NHC-2 ligands that make it ultra-stable and highly-luminescent,suitable for bio-imaging;and(3)by bearing two pyridyl groups on NHC-3,the dicationic cluster[Au:a(NHC-3)gClg]f+exhibits reversible and stable visible absorption and solubility responses to protonation/deprotonation cycles,making it a potential pH sensor(NHC-1=1,3-disopropylbenzimidazolin-ylidene;NHC-2=1,3-bis(1-benzyl-1H-benzimidazol-1-ium-yl)propane;NHC-3=1,3-bis(icolyI)benzimidazolin-ylidene).The study nicely demonstrates the importance of ligands in designing metal nanoclusters with desired functionalities.

关键词： carbene ligands gold nanocluster catalysis luminescenee Au13

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Antiferromagnetic α-MnTe: Molten-Salt-Assisted Chemical Vapor Deposition Growth and Magneto-Transport Properties

arXiv

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arXiv 2023年

作者： Li, Shuaixing Wu, Jianghua Liang, Binxi Liu, Luhao Zhang, Wei Wazir, Nasrullah Zhou, Jian Liu, Yuwei Nie, Yuefeng Hao, Yufeng Wang, Peng Wang, Lin Shi, Yi Li, Songlin National Laboratory of Solid-State Microstructures Collaborative Innovation Center of Advanced Microstructures School of Electronic Science and Engineering Nanjing University Nanjing University Nanjing210093 China College of Engineering and Applied Sciences Jiangsu Key Laboratory of Artificial Functional Materials Nanjing University Nanjing210023 China Key Laboratory of Flexible Electronics Institute of Advanced Materials Jiangsu National Synergetic Innovation Center for Advanced Materials Nanjing Tech University Nanjing211816 China

Antiferromagnetic (AF) materials are attracting increasing interest of research in magnetic physics and spintronics. Here, we report controllable synthesis of room-temperature AF α-MnTe nanocrystals (Néel temperature ~ 307 K) via molten-salt-assisted chemical vapor deposition method. The growth kinetics are investigated regarding the dependence of flake dimension and macroscopic shape on growth time and temperature. The high crystalline quality and atomic structure are confirmed by various crystallographic characterization means. Cryogenic magneto-transport measurements reveal anisotropic magnetoresistance (MR) response and a complicated dependence of MR on temperature, owing to the subtle competition among multiple scattering mechanisms of thermally excited magnetic disorders (magnon drag), magnetic transition and thermally populated lattice phonons. Overall positive MR behavior with twice transitions in magnitude is observed when out-of-plane external magnetic field (B) is applied, while a transition from negative to positive MR response is recorded when in-plane B is applied. The rich magnetic transport properties render α-MnTe a promising material for exploiting functional components in magnetic devices. © 2023, CC BY-NC-SA.

关键词： Antiferromagnetism

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Design and fabrication of a vigorous“cavitation-on-a-chip”device with a multiple microchannel configuration

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Microsystems & Nanoengineering 2021年第3期7卷 149-161页

作者： Farzad Rokhsar Talabazar Mohammad Jafarpour Merve Zuvin Hongjian Chen Moein Talebian Gevari Luis Guillermo Villanueva Dmitry Grishenkov Ali Koşar Morteza Ghorbani Faculty of Engineering and Natural Science Sabanci UniversityTuzlaIstanbulTurkey Sabanci University Nanotechnology Research and Application Center TuzlaIstanbulTurkey Advanced NEMS Laboratory École Polytechnique Fédérale de Lausanne(EPFL)CH-1015LausanneSwitzerland Department of Biomedical Engineering and Health Systems KTH Royal Institute of TechnologySE-14157StockholmSweden Division of Solid State Electronics Department of Electrical EngineeringTheÅngström LaboratoryUppsala UniversityUppsalaSweden Center of Excellence for Functional Surfaces and Interfaces for Nano-Diagnostics(EFSUN) Sabanci UniversityOrhanliTuzlaIstanbulTurkey

Hydrodynamic cavitation is one of the major phase change phenomena and occurs with a sudden decrease in the local static pressure within a *** the emergence of microelectromechanical systems(MEMS),high-speed microfluidic devices have attracted considerable attention and been implemented in many fields,including cavitation *** this study,a new generation of‘cavitation-on-a-chip’devices with eight parallel structured microchannels is *** new device is designed with the motivation of decreasing the upstream pressure(input energy)required for facile hydrodynamic cavitation *** and a poly(vinyl alcohol)(PVA)microbubble(MB)suspension are used as the working *** results show that the cavitation inception upstream pressure can be reduced with the proposed device in comparison with previous studies with a single flow restrictive ***,using PVA MBs further results in a reduction in the upstream pressure required for cavitation *** this new device,different cavitating flow patterns with various intensities can be observed at a constant cavitation number and fixed upstream pressure within the same ***,cavitating flows intensify faster in the proposed device for both water and the water–PVA MB suspension in comparison to previous *** to these features,this next-generation‘cavitation-on-a-chip’device has a high potential for implementation in applications involving microfluidic/organ-on-a-chip devices,such as integrated drug release and tissue engineering.

关键词： cavitation bubble faster

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