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SSRN 2023年

作者： Zhang, Xin-Yue Ren, Qiang Zhu, Lin Ding, Wen-Juan Cao, Yan-Qiang Li, Wei-Ming Wu, Di Li, Ai-Dong National Laboratory of Solid State Microstructures Materials Science and Engineering Department College of Engineering and Applied Sciences Collaborative Innovation Center of Advanced Microstructures Nanjing University Nanjing210093 China Jiangsu Leadmicro Nano-Technology Co. Ltd. Jiangsu Wuxi China Institute of Micro-nano Photonic & Beam Steering School of Science Nanjing University of Science and Technology Nanjing210094 China

Hydrogen has long been regarded as a clean and renewable energy carrier alternative to the fossil fuel, the development of highly sensitive and reliable hydrogen sensor is imperative for the large-scale implementation of green energy hydrogen. In this work, SnO2, ZnO and SnO2/ZnO composite thin film H2 sensors were fabricated on SiO2/Si substrates by atomic layer deposition. The effect of ALD cycles and heat treatment temperatures on the sensing properties of the thin film sensors was investigated deeply. It is found that the 100-cycle SnO2/150-cycle ZnO composite film shows the best H2-sensing performance such as large response of 93 to 30 ppm H2 at 200 °C, fast response/recovery time of 50 s/29 s, and low detection limit of 250 ppb. The response of SnO2/ZnO composite film sensor is 10 times and 2 times higher than that of the pure ZnO and SnO2 thin film ones at working temperature of 200°C, respectively. A possible mechanism for performance improvement of the SnO2/ZnO composite film H2 sensor is proposed, attributed to the synergistic effect of the SnO2-ZnO heterojunction and the oxygen vacancies in the SnO2 film. ALD may be a feasible strategy to construct Si-based highly sensitive hydrogen sensors for micro-electromechanical system application. © 2023, The Authors. All rights reserved.

关键词： Atomic layer deposition

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Diversity of structural phases in AGeX3 halides

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Physical Review B 2022年第2期106卷 024112-024112页

作者： Yaorong Luo Hao Tian Xu Li Lan Chen Yurong Yang Di Wu National Laboratory of Solid State Microstructures and Collaborative Innovation Center of Advanced Microstructures Department of Materials Science and Engineering Nanjing University Nanjing 210093 China Jiangsu Key Laboratory of Artificial Functional Materials Nanjing University Nanjing 210093 China School of Physics and Electronic Engineering Zhengzhou Normal University Zhengzhou 450044 China

Utilizing first-principles and particle swarm optimization methods, we performed a systematic investigation of crystal structural stability and electrical properties of AGeX3 compounds (A=Li,Na,K,Rb,Cs;X=F,Cl,Br,I). Our work not only found the perovskite phases, but also discovered the post-perovskite, post-post-perovskite, and octahedra face-sharing structure phases, which are usually stable under high pressure, large strain, or exist in the inorganic–organic compound. These diverse structural phases provide abundant and promising properties. One striking phase is the P212121 perovskite in KGeCl3 and KGeBr3, which possesses intrinsic small polar vortices and antivortices that may lead to a gyrotropic phase transition. The ferroelectric phase of R3c (LiGeX3, NaGeX3), R3m (CsGeX3) and Pna21 (KGeX3, RbGeX3) were also found. The new Pna21 phase possesses both proper and hybrid improper polarization, and the latter is evidenced by two original energetic couplings: one coupling polarization with the antipolar distortion from Ge atoms and antipolar distortion from A-site atoms, and another coupling polarization with out-of-phase halide octahedral tilting, in-phase halide octahedral tilting, and antipolar distortion from Ge atoms. The diverse structural phases and electrical properties make Ge-based halide a promising ABX3 structure family in ferroics and piezoelectrics.

关键词： Crystal structure Ferroelectricity Crystal structures Ferroelectrics Perovskites First-principles calculations High-throughput calculations

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

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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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Terahertz technology in intraoperative neurodiagnostics:A review

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Opto-Electronic Advances 2023年第5期6卷 41-67页

作者： Nikita V.Chernomyrdin Guzel R.Musina Pavel V.Nikitin Irina N.Dolganova Anna S.Kucheryavenko Anna I.Alekseeva Yuye Wang Degang Xu Qiwu Shi Valery V.Tuchin Kirill I.Zaytsev Prokhorov General Physics Institute of the Russian Academy of Sciences Moscow 119991Russia Bauman Moscow State Technical University Moscow 105005Russia Institute for Regenerative Medicine Sechenov UniversityMoscow 119991Russia Institute of Solid State Physics of the Russian Academy of Sciences Chernogolovka 142432Russia Research Institute of Human Morphology Moscow 117418Russia School of Precision Instrument and Optoelectronic Engineering Tianjin UniversityTianjin 300000China College of Materials Science and Engineering Sichuan UniversityChengdu 610000China Science Medical Center Saratov State UniversitySaratov 410012Russia Institute of Precision Mechanics and Control FRC"Saratov Scientific Centre of the Russian Academy of Sciences"Saratov 410028Russia

Terahertz(THz)technology offers novel opportunities in biology and medicine,thanks to the unique features of THzwave interactions with tissues and *** them,we particularly notice strong sensitivity of THz waves to the tissue water,as a medium for biochemical reactions and a main endogenous marker for THz spectroscopy and *** of the brain have an exceptionally high content of *** factor,along with the features of the structural organization and biochemistry of neuronal and glial tissues,makes the brain an exciting subject to study in the THz *** this paper,progress and prospects of THz technology in neurodiagnostics are overviewed,including diagnosis of neurodegenerative disease,myelin deficit,tumors of the central nervous system(with an emphasis on brain gliomas),and traumatic brain *** and applied challenges in study of the THz-wave–brain tissue interactions and development of the THz biomedical tools and systems for neurodiagnostics are discussed.

关键词： THz technology THz spectroscopy and imaging superresolution imaging biophotonics brain neurodiagnosis tumor glioma neurodegenerative diseases brain injury light scattering

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Mitigating Fast Thermal Instability by Engineered Laser Sweep in AIN Soliton Microcomb Generation

Mitigating Fast Thermal Instability by Engineered Laser Swee...

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Asia Communications and Photonics Conference and Exhibition (ACP)

作者： Zihao Wang Kewei Liu Shunyu Yao Yanan Guo Jianchang Yan Junxi Wang Changxi Yang Chengying Bao Department of Precision Instruments State Key Laboratory of Precision Measurement Technology and Instruments Tsinghua University Beijing China Center for Materials Science and Optoelectronics Engineering University of the Chinese Academy of Sciences Beijing China Research and Development Center for Solid State Lighting Institute of Semiconductors Chinese Academy of Sciences Beijing China

Transient thermal instability represents a significant challenge in generating soliton microcombs. Fast laser sweep can be an efficient method to mitigate thermal instability, but it would require ultrahigh laser sweep rate for crystalline microresonators with fast thermal relaxation. Here, we engineer the laser sweep waveform to generate AIN-on-sapphire soliton microcombs with an intermediate sweep speed $(< 30\text{GHz}/\mu \mathrm{s})$ . Two laser sweep methods with a backward + forward tuning or a two-step backward tuning added after the fast forward laser sweep are demonstrated to stabilize solitons.

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Wear-Resistant Phenolic Composites Reinforced with Attapulgite and Short Carbon Fibers for Applications Subjected to Both Dry and Oil-Lubricated Sliding

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SSRN 2024年

作者： Wang, Xiaodong Li, Huan He, Ren Li, Guitao Wang, Xiaoxin Wetzel, Bernd Zhang, Ga College of Polymer Science and Engineering Qingdao University of Science and Technology Qingdao266044 China State Key Laboratory of Solid Lubrication Lanzhou Institute of Chemical Physics Chinese Academy of Sciences Lanzhou730000 China Key Laboratory of Science and Technology on Wear and Protection of Materials Lanzhou Institute of Chemical Physics Chinese Academy of Sciences Lanzhou730000 China Qingdao Center of Resource Chemistry & New Materials Qingdao266071 China Leibniz-Institut fuer Verbundwerkstoffe GmbH University of Kaiserslautern Kaiserslautern67663 Germany

Attapulgite (AT) nanofibers were integrated into phenol-formaldehyde resin (PF) and PF composites reinforced with short carbon fibers (CF). The hybrid nanocomposites reinforced with both AT and CF exhibit very high mechanical strengths. The addition of AT into PF improves greatly the wear resistance for sliding under dry and oil-lubrication conditions. Interestingly, AT and CF lower synergistically the friction coefficient of PF subjected to harsh dry sliding conditions. The hybrid nanocomposites exhibit excellent tribological performance under both dry and oil-lubrication conditions. Tribofilms’ nanostructures were comprehensively analyzed for disclosing dominant tribological mechanisms. Outcome of this work provides new ideas for developing tribo-materials of a high adaptability to multiple dry/oil-lubrication conditions. © 2024, The Authors. All rights reserved.

关键词： Nanofibers

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Evidence for Magnetic Fractional Excitations in a Kitaev Quantum-Spin-Liquid Candidate α-RuCl_(3)

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Chinese Physics Letters 2022年第2期39卷 72-77页

作者： Kejing Ran Jinghui Wang Song Bao Zhengwei Cai Yanyan Shangguan Zhen Ma Wei Wang Zhao-Yang Dong P.Cermak A.Schneidewind Siqin Meng Zhilun Lu Shun-Li Yu Jian-Xin Li Jinsheng Wen School of Physical Science and Technology and ShanghaiTech Laboratory for Topological PhysicsShanghaiTech UniversityShanghai 200031China National Laboratory of Solid State Microstructures and Department of Physics Nanjing UniversityNanjing 210093China Institute for Advanced Materials Hubei Normal UniversityHuangshi 435002China School of Science Nanjing University of Posts and TelecommunicationsNanjing 210023China Department of Applied Physics Nanjing University of Science and TechnologyNanjing 210094China Julich Centre for Neutron Science(JCNS)at Heinz Maier-Leibnitz Zentrum(MLZ) Forschungszentrum Jülich GmbHLichtenbergstr.185748 GarchingGermany Charles University Faculty of Mathematics and PhysicsDepartment of Condensed Matter PhysicsKe Karlovu 512116PrahaCzech Republic Helmholtz-Zentrum Berlin fur Materialien und Energie GmbH Hahn-Meitner-Platz 1D-14109BerlinGermany China Institute of Atomic Energy(CIAE) Beijing 102413China The Henry Royce Institute and Department of Materials Science and Engineering The University of SheffieldSir Robert Hadfield BuildingSheffieldS13JDUnited Kingdom Collaborative Innovation Center of Advanced Microstructures Nanjing UniversityNanjing 210093China

It is known that α-RuCl_(3) has been studied extensively because of its proximity to the Kitaev quantum-spin-liquid(QSL)phase and the possibility of approaching it by tuning the competing *** we present the first polarized inelastic neutron scattering study on α-RuCl_(3) single crystals to explore the scattering continuum around the Γ point at the Brillouin zone center,which was hypothesized to be resulting from the Kitaev QSL state but without concrete *** polarization analyses,we find that,while the spin-wave excitations around the Γ point vanish above the transition temperature T_(N),the pure magnetic continuous excitations around the Γ point are robust against ***,by calculating the dynamical spin-spin correlation function using the cluster perturbation theory,we derive magnetic dispersion spectra based on the K-Γ model,which involves with a ferromagnetic Kitaev interaction of −7.2 meV and an off-diagonal interaction of 5.6 *** find this model can reproduce not only the spin-wave excitation spectra around the Γ point,but also the non-spin-wave continuous magnetic excitations around the Γ *** results provide evidence for the existence of fractional excitations around the Γ point originating from the Kitaev QSL state,and further support the validity of the K-Γ model as the effective minimal spin model to describe α-RuCl_(3).

关键词： temperature excitation diagonal

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Galvanic replacement reaction for in situ fabrication of litchi-shaped heterogeneous liquid metal-Au nano-composite for radio-photothermal cancer therapy

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Bioactive materials 2021年第3期6卷 602-612页

作者： Zhenhu Guo Jingsong Lu Dan Wang Wensheng Xie Yongjie Chi Jianzhong Xu Nonaka Takuya Junxin Zhang Wanling Xu Fei Gao Hong Wu Lingyun Zhao State Key Laboratory of Powder Metallurgy Powder Metallurgy Research InstituteCentral South UniversityChangshaHunan410083China Key Laboratory of Advanced Materials Ministry of Education of ChinaSchool of Materials Science and EngineeringTsinghua UniversityBeijing100084China State Key Laboratory of New Ceramics and Fine Processing School of Materials Science and EngineeringTsinghua UniversityBeijing100084China Research Center of Magnetic and Electronic Materials College of Materials Science and EngineeringZhejiang University of TechnologyHangzhouZhejiang310014China Department of Nanoengineering Chemical Engineering Programand Moores Cancer CenterUniversity of California San DiegoLa JollaCA92093United States The Key Laboratory of Bioorganic Phosphorus Chemistry&Chemical Biology(Ministry of Education) Department of ChemistryTsinghua UniversityBeijing100084China School of Earth Sciences and Resources China University of Geosciences(Beijing)Beijing100083China Shaanxi University of Chinese Medicine Xi'anShanxi712046China

With tremendous research advances in biomedical application,liquid metals(LM)also offer fantastic chemistry for synthesis of novel ***,as a pioneering trial,litchi-shaped heterogeneous eutectic gallium indium-Au nanoparticles(EGaIn-Au NPs),served as effective radiosensitizer and photothermal agent for radio-photothermal cancer therapy,have been successfully prepared using in situ interfacial galvanic replacement *** enhanced photothermal conversion efficiency and boosted radio-sensitization effect could be achieved with the reduction of Au nanodots onto the eutectic gallium indium(EGaIn)NPs *** importantly,the growth of tumor could be effectively inhibited under the combined radio-photothermal therapy mediated by EGaIn-Au *** by this approach,in situ interfacial galvanic replacement reaction may open a novel strategy to fabricate LM-based nano-composite with advanced multi-functionalities.

关键词： Au nanodots Gallium Galvanic replacement reaction Indium Radio-photothermal therapy

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Exceptional Combination of Mechanical Properties and Cavitation Erosion-Corrosion Resistance in a Fe23.7co23.8ni23.8cr23.7mo5 Multi-Principal Element Alloy

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SSRN 2024年

作者： Niu, Jiacheng Fu, Zhiqiang Hou, Guoliang Chen, Qiang Yao, Ning Chen, Weiping Lu, Tiwen Chu, Chenliang Wen, Haiming Guangdong Key Laboratory for Advanced Metallic Materials Processing South China University of Technology Guangdong Guangzhou510640 China National Engineering Research Center of Near-net-shape Forming for Metallic Materials South China University of Technology Guangzhou510640 China State Key Laboratory of Solid Lubrication Lanzhou Institute of Chemical Physics Chinese Academy of Sciences Lanzhou730000 China Southwest Technology and Engineering Research Institute Chongqing400039 China School of Mechanical and Power Engineering East China University of Science and Technology Shanghai200237 China Department of Materials Science and Engineering Missouri University of Science and Technology RollaMO65409 United States

This study analyzed cavitation erosion (CE) and cavitation erosion-corrosion (CE-C) of single-phase face-centered cubic structured Fe23.7Co23.8Ni23.8Cr23.7Mo5 multi-principal element alloy (MPEA) with varying grain sizes obtained through post-deformation annealing. The ~4.1 μm (average grain size) sample showed an excellent combination of strength and ductility and the best electrochemical corrosion resistance in 3.5 wt.% NaCl solution and demonstrated superior resistance to pure CE and CE-C compared to other grain sizes (~10.3 and ~15.2 μm). The ~4.1 μm sample had better CE-C resistance due to its excellent mechanical properties, high work hardening ability, and excellent anti-corrosion performance. © 2024, The Authors. All rights reserved.

关键词： Erosion

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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23期15卷

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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