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Infrared imaging of magnetic octupole domains in non-collinear antiferromagnets

National Science Review 2024年第06期11卷 197-205页

作者： Peng Wang Wei xia Jinhui Shen yulong Chen Wenzhi Peng Jiachen Zhang Haolin Pan xuhao yu Zheng Liu yang Gao Qian Niu Zhian xu Hongtao yang Yanfeng Guo Dazhi Hou International Center for Quantum Design of Functional Materials(ICQD) School of Emerging TechnologyUniversity of Science and Technology of China College of Mathematics and Physics Qingdao University of Science and Technology School of Physical Science and Technology Shanghai Tech University Shanghai Tech Laboratory for Topological Physics Shanghai Tech University Department of Physics University of Science and Technology of China CAS Key Laboratory of Strongly-Coupled Quantum Matter Physics University of Science and Technology of China Xi'an Institute of Optics and Precision Mechanics of Chinese Academy of Sciences

Magnetic structure plays a pivotal role in the functionality of antiferromagnets（AFMs）, which not only can be employed to encode digital data but also yields novel phenomena. Despite its growing significance,visualizing the antiferromagnetic domain structure remains a challenge, particularly for non-collinear AFMs. Currently, the observation of magnetic domains in non-collinear antiferromagnetic materials is feasible only in Mn3Sn, underscoring the limitations of existing techniques that necessitate distinct methods for in-plane and out-of-plane magnetic domain imaging. In this study, we present a versatile method for imaging the antiferromagnetic domain structure in a series of non-collinear antiferromagnetic materials by utilizing the anomalous Ettingshausen effect（AEE）, which resolves both the magnetic octupole moments parallel and perpendicular to the sample surface. Temperature modulation due to AEE originating from different magnetic domains is measured by lock-in thermography, revealing distinct behaviors of octupole domains in different antiferromagnets. This work delivers an efficient technique for the visualization of magnetic domains in non-collinear AFMs, which enables comprehensive study of the magnetization process at the microscopic level and paves the way for potential advancements in applications.

关键词： non-collinear antiferromagnet domain structure infrared imaging anomalous Ettingshausen effect

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Effect of linear friction welding process on microstructure evolution,mechanical properties and corrosion behavior of GH4169 superalloy

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Chinese Journal of Aeronautics 2024年第6期37卷 504-520页

作者： yu SU xiawei yang Tingxi MENG Dong WU Rui xu Haiyu xu Wenya LI Shuo YIN State Key Laboratory of Solidification Processing School of Materials Science and EngineeringNorthwestern Polytechnical UniversityXi’an 710072China Department of Mechanical Manufacturing&Biomedical EngineeringParsons BuildingTrinity College DublinThe University of DublinDublin 2Ireland

Linear Friction Welding(LFW)technology was used to realize the welding of GH4169 superalloy,and the effect of welding parameters on the microstructure,mechanical properties and corrosion behavior of the joint was *** results show that there is a positive correlation between the weld hardness and the tensile *** the gradual increase of heat input and welding pressure,the joint quality is gradually improved,but the heat affected zone is not significantly *** smaller the grain size of the weld,the higher the strength and plasticity of the *** the increase of the joint shortening amount,the corrosion resistance of the weld first gradually ***,when the shortening reaches a certain level,the corrosion resistance of the joint becomes little *** the increase of solution temperature,the corrosion current density increases and the polarization impedance *** higher the corrosion temperature,the worse the corrosion resistance of the *** is no significant correlation between the joint strength and the corrosion *** corrosion resistance of the joint can be enhanced without changing the joint mechanical properties by reducing the welding frequency and amplitude or increasing the welding pressure.

关键词： Linear Friction Welding(LFW) GH4169 superalloy Microstructure Mechanical properties Corrosion behavior

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Rational design of metal selenides nanomaterials for alkali metal ion(Li^(+)/Na^(+)/K^(+))batteries:current status and perspectives

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Rare Metals 2024年第5期43卷 1906-1931页

作者： Rui Sun Feng xu cai-Hong Wang Sheng-Jun Lu yu-Fei Zhang Hao-Sen Fan College of Materials Science and Metallurgy Engineering Guizhou UniversityGuiyang550025China School of Chemistry and Chemical Engineering Guangzhou UniversityGuangzhou510006China

Recently,metal selenides have obtained widespread attention as electrode materials for alkali(Li^(+)/Na^(+)/K^(+))batteries due to their promising theoretical capacity and ***,metal selenides,similar to metal oxides and sulfides,also suffer from severe volume explosion during repeated charge/discharge processes,which results in the structure collapse and the following pulverization of electrode ***,it leads to poor cycle stability and influencing their further *** order to solve these issues,some special strategies,including elemental doping,coupling with carbon materials,synthesis of the bimetal selenides with heterostructure,etc.,have been gradually applied to design novel electrode materials with outstanding electrochemical ***,the recent research progress on metal selenides as anodes for alkali ion batteries is summarized,including the regulation of crystal structure,synthesis strategies,modification methods,and electrochemical mechanisms and ***,the challenges of metal selenides and the perspective for future electrode material design are *** is hoped to pave a way for the development of metal selenide electrode materials for the potential applications for alkali metal ion(Li^(+)/Na^(+)/K^(+))batteries.

关键词： Rational design Metal selenides Nanostructure Li^(+) batteries Na^(+) batteries K^(+) batteries

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Tungsten chalcogenides as anodes for potassium-ion batteries

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Tungsten 2024年第2期6卷 278-292页

作者： yu-Han Wu Wei-Hao xia yun-Zhuo Liu Peng-Fei Wang yu-Hang Zhang Jin-Ru Huang yang xu De-Ping Li Li-Jie Ci School of Environmental and Chemical Engineering Shenyang University of TechnologyShenyang 110870China Key Laboratory of Advanced Energy Materials Chemistry(Ministry of Education) Nankai UniversityTianjin 300071China State Key Laboratory of Advanced Welding and Joining School of Materials Science and EngineeringHarbin Institute of Technology(Shenzhen)Shenzhen 518055China Department of Chemistry University College LondonLondon WC1H 0AJUnited Kingdom

Potassium-ion batteries(PIBs)by virtue of their strong cost competitiveness and similar electrochemical properties to lithiumion batteries have been deemed to be a promising electrochemical energy storage *** promote the application in the commercial market,developing electrode materials with high specifi c capacities,superior cycling stability,and reliable safety is of great *** materials as an important component of PIBs play a decisive role,among which twodimensional transition metal chalcogenides(2D TMCs)have attracted wide attention owing to their unique material and electrochemical *** the 2D TMCs’family,molybdenum chalcogenides as fl agship are the most studied materials and demonstrated the potential as *** the deepening of research on 2D TMCs,another shining member that possesses similar properties to molybdenum chalcogenides,tungsten chalcogenides(WS_(2),WSe_(2),and WTe_(2)),has aroused tremendous *** many inspiring results,various challenges remain to be further addressed;meanwhile,some results are still unclear and ***,this review fi rst introduces their material properties and electrochemical storage ***,we systematically overview the research progress and put forward promoting improvement ***,challenges and opportunities that would be future research directions are discussed.

关键词： Electrochemical energy storage Potassium-ion batteries Anodes Tungsten chalcogenides

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Impact of well placement and flow rate on production efficiency and stress field in the fractured geothermal reservoirs

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Deep Underground Science and Engineering 2024年第3期3卷 358-368页

作者： Xinghui Wu Meifeng cai xu Wu Ketong Zhang Ziqing Yin yu Zhu School of City and Architecture Engineering Zaozhuang UniversityZaozhuangChina School of Civil and Resource Engineering University of Science and Technology BeijingBeijingChina Beijing Municipal Engineering Research Institute BeijingChina Department of Civil and Environmental Engineering University of StrathclydeGlasgowUK

Geothermal energy has gained wide attention as a renewable alternative for mitigating greenhouse gas *** advancements in enhanced geothermal system technology have enabled the exploitation of previously inaccessible geothermal ***,the extraction of geothermal energy from deep reservoirs poses many challenges due to high‐temperature and high‐geostress *** factors can significantly impact the surrounding rock and its fracture formation.A comprehensive understanding of the thermal–hydraulic–mechanical(THM)coupling effect is crucial to the safe and efficient exploitation of geothermal *** study presented a THM coupling numerical model for the geothermal reservoir of the yangbajing geothermal *** proposed model investigated the geothermal exploitation performance and the stress distribution within the reservoir under various combinations of geothermal wells and mass flow *** geothermal system performance was evaluated by the criteria of outlet temperature and geothermal *** results indicate that the longer distance between wells can increase the outlet temperature of production wells and improve extraction efficiency in the short *** contrast,the shorter distance between wells can reduce the heat exchange area and thus mitigate the impact on the reservoir stress.A larger mass flow rate is conducive to the production capacity enhancement of the geothermal system and,in turn causes a wider range of stress *** findings provide valuable insights into the optimization of geothermal energy extraction while considering reservoir safety and long‐term *** study deepens the understanding of the THM coupling effects in geothermal systems and provides an efficient and environmentally friendly strategy for a geothermal energy system.

关键词： geothermal exploitation performance geothermal reservoir mass flow rate stress field well placementa

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From common biomass materials to high-performance tissue engineering scaffold: Biomimetic preparation, properties characterization, in vitro and in vivo evaluations

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Journal of Bioresources and Bioproducts 2024年第2期9卷 185-196页

作者： Zongpu xu Fang He Jing yu Zhangze yang yu Zhu Rong Liao Ruyin Lyu Mei yang Liangjun Zhu Mingying yang Institute of Applied Bioresources College of Animal SciencesZhejiang UniversityHangzhou 310058China Key Laboratory of Silkworm and Bee Resource Utilization and Innovation of Zhejiang Province Zhejiang UniversityHangzhou 310058China Department of Neurosurgery the First Affiliated HospitalZhejiang University School of MedicineHangzhou 310003China

Converting common biomass materials to high-performance biomedical products could not only reduce the environmental pressure associated with the large-scale use of synthetic materials,but also increase the economic *** as a very promising candidate has drawn considerable attention owing to its abundant sources and remarkable ***,pure chitosan materials usually exhibit insufficient mechanical properties and excessive swelling ratio,which seriously affected their in vivo stability and integrity when applied as tissue engineering ***,simultaneously improving the mechanical strength and biological compatibility of pure chitosan(CS)scaffolds becomes very ***,inspired by the fiber-reinforced con-struction of natural extracellular matrix and the porous structure of cancellous bone,we built silk microfibers/chitosan composite scaffolds via ice-templating *** biomimetic strategy achieved 500%of mechanical improvement to pure chitosan,and meanwhile still maintaining high porosity(>87%).In addition,the increased roughness of chitosan pore walls by embedded silk microfibers significantly promoted cell adhesion and *** importantly,after subcutaneous implantation in mice for four weeks,the composite scaffold showed greater struc-tural integrity,as well as better collagenation,angiogenesis,and osteogenesis abilities,suggesting its great potential in biomedicine.

关键词： Chitosan Biomimetic strategy Fiber-reinforced composite Mechanical property Biocompatibility

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Helicobacter pylori infection alters gastric microbiota structure and biological functions in patients with gastric ulcer or duodenal ulcer

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World Journal of Gastroenterology 2024年第24期30卷 3076-3085页

作者： Ling-xiao Jin yu-Peng Fang Chen-Mei xia Teng-Wei cai Qian-Qian Li yu-Yin Wang Hai-Fan Yan xia Chen Department of Gastroenterology Wenling Hospital of Wenzhou Medical University(The First People’s Hospital of Wenling)Wenling 317500Zhejiang ProvinceChina

BACKGROUND Helicobacter pylori(***)infection is closely associated with gastrointestinal *** preliminary studies have indicated that *** infection had a significant impact on the mucosal microbiome structure in patients with gastric ulcer(GU)or duodenal ulcer(DU).AIM To investigate the contributions of *** infection and the mucosal microbiome to the pathogenesis and progression of ulcerative *** Patients with *** infection and either GU or DU,and healthy individuals without *** infection were *** or duodenal mucosal samples was obtained and subjected to metagenomic *** compositions of the microbial communities and their metabolic functions in the mucosal tissues were *** Compared with that in the healthy individuals,the gastric mucosal microbiota in the ***-positive patients with GU was dominated by ***,with signi-ficantly reduced *** intergroup differential functions,which were enriched in the ***-positive GU patients,were all derived from ***,particularly those concerning transfer RNA queuosine-modification and the synthesis of demethylmenaquinones or menaquinones.A significant enrichment of the uibE gene was detected in the synthesis *** was no significant difference in microbial diversity between the ***-positive DU patients and healthy *** *** infection significantly alters the gastric microbiota structure,diversity,and biological functions,which may be important contributing factors for GU.

关键词： Helicobacter pylori Gastric ulcer Duodenal ulcer Metagenomic sequencing Transfer RNA queuosine-modification Menaquinones

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Corrosion behavior of pure metals(Ni and Ti)and alloys(316H SS and GH3535)in liquid GaInSn

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Nuclear Science and Techniques 2024年第3期35卷 70-83页

作者： Jian-Hui yu Hong-xia xu xiang-Xi Ye Bin Leng Han-xun Qiu Xing-Tai Zhou School of Materials and Chemistry University of Shanghai for Science and TechnologyShanghai 200093China Shanghai Institute of Applied Physics Chinese Academy of SciencesShanghai 201800China

In this study,the interactions between a Ga-based liquid metal,GaInSn,and several metal materials,including pure metals(Ni and Ti)and alloys(316H stainless steel(SS)and GH3535),at 650℃were *** aim was to evaluate the corrosion performance and select a suitable candidate material for use as a molten salt manometer diaphragm in thermal energy storage *** results indicated that the alloys(316H SS and GH3535)exhibited less corrosion than pure metals(Ni and Ti)in liquid ***-rich binary intermetallic compounds were found to form on the surfaces of all the tested metal materials exposed to liquid GaInSn,as a result of the decomposition of liquid GaInSn and its reaction with the constituent elements of the metal *** corrosion mechanism for all the tested materials exposed to liquid GaInSn was also investigated and proposed,which may aid in selecting the optimal candidate material when liquid GaInSn is used as the pressure-sensing medium.

关键词： Metal materials Liquid GaInSn Corrosion Intermetallic compounds Thermal energy storage systems

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αDecay in extreme laser fields within a deformed Gamow-like model

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Nuclear Science and Techniques 2024年第2期35卷 131-144页

作者： Qiong xiao Jun-Hao Cheng yang-yang xu You-Tian Zou Jun-Gang Deng Tong-Pu yu Department of Physics National University of Defense TechnologyChangsha 410073China College of Science China Three Gorges UniversityYichang 443002China

In this study, the effect of extreme laser fields on the α decay process of ground-state even–even nuclei was *** the deformed Gamow-like model, we found that state-of-the-art lasers can cause a slight change in the α decay penetration probability of most nuclei. In addition, we studied the correlation between the rate of change of the α decay penetration probability and angle between the directions of the laser electric field and α particle emission for different nuclei. Based on this correlation, the average effect of extreme laser fields on the half-life of many nuclei with arbitrary α particle emission angles was calculated. The calculations show that the laser suppression and promotion effects on the α decay penetration probability of the nuclei population with completely random α particle-emission directions are not completely *** remainder led to a change in the average penetration probability of the nuclei. Furthermore, the possibility of achieving a higher average rate of change by altering the spatial shape of the laser is explored. We conclude that circularly polarized lasers may be helpful in future experiments to achieve a more significant average rate of change of the α decay half-life of the nuclei population.

关键词： αDecay Deformed Gamow-like model Half-lives Extreme laser field Penetration probability

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Arbitrary skin metallization by pencil-writing inspired solid-ink rubbing for advanced energy storage and harvesting

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Journal of Energy Chemistry 2024年第1期88卷 592-602,I0013页

作者： Yonghan Zhou Zhongfeng Ji Wenrui cai xuewei He Ruiying Bao xuewei Fu Wei yang yu Wang College of Polymer Science and Engineering State Key Laboratory of Polymer Materials EngineeringSichuan UniversityChengdu 610065SichuanChina

The development of a durable metallic coating on diverse substrates is both intriguing and challenging,particularly in the research of metal-conductive materials for applications such as batteries,soft electronics,and ***,by learning from the pencil-writing process,a facile solid-ink rubbing technology(SIR-tech)is invented to address the above *** solid-ink is exampled by rational combination of liquid metal and graphite *** harnessing the synergistic effects between rubbing and adhesion,controllable metallic skin is successfully formed onto metals,woods,ceramics,and plastics without limitation in size and ***,outperforming pure liquid-metal coating,the composite metallic skin by SIR-tech is very robust due to the self-lamination of graphite nanoplate exfoliated by liquid-metal *** critical factors controlling the structures-properties of the composite metallic skin have been systematically investigated as *** applications,the SIR-tech is demonstrated to fabricate high-performance composite current collectors for next-generation batteries without traditional metal ***,advanced skin-electrodes are further demonstrated for stable triboelectricity generation even under temperature fluctuation from-196 to 120℃.This facile and highly-flexible SIR-tech may work as a powerful platform for the studies on functional coatings by liquid metals and beyond.

关键词： Microadhesion guided technology Skin metallization by solid-ink rubbing Liquid metal composites Composite current collector Batteries and triboelectric nanogenerators

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