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Formation and evolution of supercritical geofluid

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Science china Earth Sciences 2025年第1期68卷 39-51页

作者： Huaiwei NI Yilin XIAO Xiaolin XIONG Xiandong LIU Chunxiao GAO Yi-Xiang CHEN Yunguo LI Wan-Cai LI Xuan GUO Yang-Yang WANG Dong-Bo TAN Li ZHANG State Key laboratory of Lithospheric and Environmental Coevolution University of Science and Technology of ChinaHefei230026China Deep Space Exploration laboratory/School of Earth and Space Sciences University of Science and Technology of ChinaHefei230026China Guangzhou Institute of Geochemistry Chinese Academy of SciencesGuangzhou510640China School of Earth Sciences and Engineering Nanjing UniversityNanjing210023China State Key lab of Superhard Materials Jilin UniversityChangchun130012China

In this work,we provide a comprehensive review on the formation,evolution,properties,and effects of supercritical *** Earth's interior,enhanced miscibility between H_(2)O and silicate by the addition of special components or by the increase of pressure and temperature gives rise to supercritical geofluid with a significant amount of both H_(2)O and silicate *** formation of supercritical geofluid in magmatic-hydrothermal systems,typified by pegmatite system,is governed by meltfluid critical *** formation of supercritical geofluid in metamorphic systems,typified by subducted slab,is governed by the second critical end *** results suggest that the presence of boron and fluorine in pegmatite system makes it possible to form supercritical geofluid at crustal depths,but the release of supercritical geofluid from subducted slab is withheld until almost 100 km depth.A major presence of both H_(2)O and depolymerized structural units(monomers,dimers,etc.)endows supercritical geofluid with unique physical properties including low density,low elastic moduli,low viscosity,high diffusivity,and high electrical *** geofluid can effectively mobilize a variety of elements even including high field strength elements and heavy rare earth *** chemical signatures of supercritical geofluid can be inherited by metasomatized mantle and mantle-derived melts,and this could give an explanation of the oxidation of arc *** separation of supercritical geofluid through the mechanism of spinodal decomposition leads to formation of a melt *** fluid inclusions recovered from subduction zone rocks and pegmatites are possible relics of supercritical *** geofluid can cause electrical anomaly and low seismic velocity near the top of subducted slab,and can be linked with intermediate-focus *** geofluid may have played a crucial role in the formation of pegmatites and associ

关键词： Supercritical geofluid Miscibility Subduction zone Pegmatite

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An AND-type 1T-FeFET array with robust write and read operations

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Science china(Information Sciences) 2025年第2期68卷 395-396页

作者： Jiacheng XU Jiayi ZHAO Hongrui ZHANG Haoji QIAN Jiani GU Bowen CHEN Gaobo LIN Rongzong SHEN Xinda SONG Huan LIU Yian DING Minglei MA Miaomiao ZHANG Xiao YU Bing CHEN Ran CHENG Gaobo XU Huaxiang YIN Yan LIU Jiajia CHEN Chengji JIN Genquan HAN Hangzhou Institute of technology and School of Microelectronics Xidian University Zhejiang lab College of Integrated Circuits Zhejiang University Key laboratory of Microelectronics Devices and Integrated technology Institute of MicroelectronicsChinese Academy of Sciences

HfO2-based ferroelectric field-effect transistor（Fe FET） has become a promising solution for next-generation embedded non-volatile memory（NVM） owing to its complementary metal-oxide-semiconductor（CMOS） compatibility,small footprint, high performance, and non-destructive readout [1]. Recent research of HfO2-based Fe FET has focused on the device operation mechanisms as well as reliability issues such as the interplay between polarization switching and charge trapping/detrapping [2], read-after-write latency [3] and endurance degradation [4].

关键词： Ferroelectric devices

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High-Magnetic-field-Induced First-Order Magnetic Transition and Tricritical Phenomenon in Antiferromagnetic Semimetal NdSb

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Chinese Physics Letters 2025年第02期 93-99页

作者：赵俊何安曼刘威凌浪生韩玉岩郗传英皮雳屈哲高浩张蕾 School of Mechanical and Electrical Engineering Sanming University Anhui Key laboratory of Low-Energy Quantum Materials and Devices High Magnetic Field LaboratoryHefei Institutes of Physical ScienceChinese Academy of Sciences Department of Physics Lab of Low-dimensional Magnetism and Spintronic DevicesSchool of PhysicsHefei University of Technology Institutes of Physical Science and Information technology Anhui University Hefei National Research Center for Physical Sciences at Microscale University of Science and Technology of China

The antiferromagnetic(AFM) semimetal NdSb is well known for the interplay between its exotic magnetism and topological properties. However, its magnetism remains poorly understood. In this study, we thoroughly investigated the magnetization of NdSb single crystals with a high magnetic field(H) of up to 30 T applied in various directions.

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Recent progress on surface chemistryⅡ:Property and characterization

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Chinese Chemical Letters 2025年第1期36卷 8-57页

作者： Xin Li Zhen Xu Donglei Bu Jinming Cai Huamei Chen Qi Chen Ting Chen Fang Cheng Lifeng Chi Wenjie Dong Zhenchao Dong Shixuan Du Qitang Fan Xing Fan Qiang Fu Song Gao Jing Guo Weijun Guo Yang He Shimin Hou Ying Jiang Huihui Kong Baojun Li Dengyuan Li Jie Li Qing Li Ruoning Li Shuying Li Yuxuan Lin Mengxi Liu Peinian Liu Yanyan Liu Jingtao Lü Chuanxu Ma Haoyang Pan JinLiang Pan Minghu Pan Xiaohui Qiu Ziyong Shen Qiang Sun Shijing Tan Bing Wang Dong Wang Li Wang Lili Wang Tao Wang Xiang Wang Xingyue Wang Xueyan Wang Yansong Wang Yu Wang Kai Wu Wei Xu Na Xue Linghao Yan Fan Yang Zhiyong Yang Chi Zhang Xue Zhang Yang Zhang Yao Zhang Xiong Zhou Junfa Zhu Yajie Zhang Feixue Gao Yongfeng Wang Center for Carbon-based Electronics and Key laboratory for the Physics and Chemistry of Nanodevices School of ElectronicsPeking UniversityBeijing 100871China Spin-X Institute School of MicroelectronicsSouth China University of TechnologyGuangzhou 511442China School of Materials and Energy Guangzhou Key Laboratory of Low-Dimensional Materials and Energy Storage DevicesGuangdong University of TechnologyGuangzhou 510006China Faculty of Materials Science and Engineering Kunming University of Science and TechnologyKunming 650093China i-lab CAS Key Laboratory of Nanophotonic Materials and DevicesSuzhou Institute of Nano-Tech and Nano-BionicsChinese Academy of SciencesSuzhou 215123China CAS Key laboratory of Molecular Nanostructure and Nanotechnology CAS Research/Education Center for Excellence in Molecular SciencesBeijing National Laboratory for Molecular Sciences(BNLMS)Institute of ChemistryChinese Academy of SciencesBeijing 100190China State Key laboratory for Organic Electronics and Information Displays&Jiangsu Key laboratory for Biosensors Institute of Advanced MaterialsJiangsu National Synergetic Innovation Center for Advanced MaterialsNanjing University of Posts and TelecommunicationsNanjing 210023China Institute of Functional Nano and Soft Materials(FUNSOM) Jiangsu Key Laboratory for Carbon-Based Functional Materials and DevicesSoochow UniversitySuzhou 215123China Hefei National Research Center for Physical Sciences at the Microscale and Synergetic Innovation Center of Quantum Information and Quantum Physics University of Science and Technology of ChinaHefei 230026China Institute of Physics&university of Chinese Academy of Sciences Beijing 100190China State Key laboratory of Catalysis Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023China College of Chemistry Beijing Normal UniversityBeijing 100875China Beijing National laboratory for Molecular Sciences(BNLMS) College of Chemistry and Molecular EngineeringPeking UniversityBeijing 100871China School

Surface with well-defined components and structures possesses unique electronic,magnetic,optical and chemical *** a result,surface chemistry research plays a crucial role in various fields such as catalysis,energy,materials,quantum,and *** science mainly investigates the correspondence between surface property and *** probe microscopy(SPM)techniques are important tools to characterize surface properties because of the capability of atomic-scale imaging,spectroscopy and manipulation at the single-atom *** this review,we summarize recent advances in surface electronic,magnetic and optical properties characterized mainly by SPM-based *** focus on elucidating theπ-magnetism in graphene-based nanostructures,construction of spin qubits on surfaces,topology properties of surface organic structures,STM-based light emission,tip-enhanced Raman spectroscopy and integration of machine learning in SPM studies.

关键词： Surface chemistry Scanning probe microscopy π-Magnetism Spin qubits Tip-enhanced Raman spectroscopy

Underground laboratories·Deep underground observation·Scientific questions——Insights from observations of multi-physic fields in deep underground labs

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Science china Earth Sciences 2025年第2期68卷 343-362页

作者： Huiqi REN Yun WANG Chang CHEN Guangyu FU Longqing QIU Lianghui GUO Chengliang XIE Yongsheng HE Heping SUN Jiwen TENG Institute of Defense Engineering Academy of Military SciencesBeijing 100850China State Kay laboratory of Geological Processes and Mineral Resources Key Laboratory of Intraplate Volcanoes and EarthquakesMinistry of EducationChina University of Geosciences(Beijing)Beijing 100083China Shanghai Institute of Microsystem and Information technology Chinese Academy of SciencesShanghai 200050China Innovation Academy for Precision Measurement Science and technology Chinese Academy of SciencesWuhan 430077China Institute of Geology and Geophysics Chinese Academy of SciencesBeijing 100029China

This paper presents a comprehensive review on recent development and research conducted in domestic and international underground laboratories. We first introduce the differences in three environments—surface, mountain tunnel cavities and underground coal mine tunnels—by examining cosmic ray background, ambient noises related to gravity and seismic measurement, and electromagnetic noises in magnetic and magnetotelluric measurements. We highlight potential misuse of the term Underground lab or Deep Underground lab when describing observations in different physical fields. We introduce unique features of underground coal mine tunnels in china, such as large spaces, ultra-quiet conditions, and ultra-clean environments. When comparing with mountain tunnel cavities and borehole observations, coal mine tunnel observations have superior long-term stability and high precision. Through observations and comparisons of multi-physic fields at surface and the deep underground, we find that the higher SNR seismic observations conducted in deep underground tunnels in coal mines are beneficial to improve velocity tomography of the solid earth. The gravity observation with a Superconducting Quantum Interference Device(SQUID) makes it possibly to capture slow earthquake, which has not been observed previously in the Chinese mainland. SQUID magnetic observations can detect fluctuations as weak as femto-Tesla(fT), enabling us to explore the attenuation of Schumann Resonance down to the solid Earth. This opens opportunities to investigate the connections between the Earth's magnetic field and the interactions within the human brain and heart. To improve the precision of quantum measurement,we should consider the possible effects of weak magnetic disturbances in deep underground environments. Finally, we discuss the importance of deep underground laboratories, observing facilities and techniques deployed in these laboratories, and their possible connection with respect to “deep space” an

关键词： Deep underground Multi-physic fields Super-high precision Slow earthquake Schumann Resonance Quantum measurement

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Polydopamine-modified biochar supported polylactic acid and zero-valent iron affects the functional microbial community structure for 1,1,1-trichloroethane removal in simulated groundwater

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Chinese Chemical Letters 2025年第1期36卷 420-426页

作者： Haitao Yin Liang Meng Li Li Jiamu Xiao Longrui Liang Nannan Huang Yansong Shi Angang Zhao Jingwen Hou School of Environmental and Geographical Sciences Shanghai Normal UniversityShanghai 200234China Yangtze River Delta Urban Wetland Ecosystem National field Scientific Observation and Research Station Shanghai 201722China Instrumental Analysis Center Shanghai Jiao Tong UniversityShanghai 200240China

In-situ enhanced bioreduction by functional materials is a cost-effective technology to remove chlorinated hydrocarbons in ***,a novel polydopamine(PDA)-modified biochar(BC)-based composite containing nanoscale zero-valent iron(n ZVI)and poly-l-lactic acid(PLLA)(PB-PDA-Fe)was synthesized to enhance the removal of 1,1,1-trichloroethane(1,1,1-TCA)in simulated groundwater with actual site *** impact on functional microbial community structure in system was also *** typical characterizations revealed uniform dispersion of PLA and n ZVI particles on the BC surface,being smoother after PDA *** composite exhibited a significantly higher performance on 1,1,1-TCA removal(82.38%,initial concentration 100 mg/L)than Fe-PDA and PB-PDA *** diversity and richness of the microbial community in the composite treatment consistently decreased during incubation due to a synergistic effect between PLLA-BC and n ***,Pedobacter,Sphaerochaeta,Shewanella,and Clostridium were identified as enriched genera by the composite through DNA-stable isotope probing(DNA-SIP),playing a crucial role in the bioreductive dechlorination *** the above results demonstrate that this novel composite selectively enhances the activity of microorganisms with extracellular respiration functions to efficiently dechlorinate 1,1,*** findings could contribute to understanding the responsive microbial community by carbon-iron composites and expedite the application of in-situ enhanced bioreduction for effective remediation of chlorinated hydrocarbon-contaminated groundwater.

关键词： Biochar-based composite Bioreductive dechlorination 1,1,1-TCA Extracellular respiration microorganisms Groundwater

High yield growth of centimeter-sized black phosphorus single crystal thin flakes through bidirectional vapor transport

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Science china Materials 2025年第1期68卷 217-225页

作者： Siyuan Wang Cheng Chen Yaning Liang Xingang Hou Xiangyi Wang Zhuo Dong Junyong Wang Chao Jiang Kai Zhang Key laboratory of Semiconductor Display Materials and Chips&i-lab Suzhou Institute of Nano-Tech and Nano-BionicsChinese Academy of SciencesSuzhou 215123China School of Nano Science and technology University of Science and Technology of ChinaSuzhou 215123China MIIT Key laboratory of Semiconductor Microstructure and Quantum Sensing and Department of Applied PhysicsNanjing University of Science and TechnologyNanjing 210094China School of Materials Science and Engineering Shanghai UniversityShanghai 200444China CAS Key laboratory of Standardization and Measurement for Nanotechnology National Center for Nanoscience and TechnologyBeijing 100190China university of Chinese Academy of Sciences Beijing 100049China

Black phosphorus(BP)has been regarded as a promising two-dimensional semiconductor due to its excellent properties including high carrier mobility and widely tunable direct *** extensive interest as well as research progress,the preparation of large-size and high-quality BP single crystal in high throughput still remains ***,a facile growth of centimeter-sized BP single crystal flakes with dozens of throughput per batch is achieved by using bidirectional vapor transport(BVT)*** crystal quality is confirmed by structural and spectrum characterizations,with an X-ray diffraction rocking curve peak half-height width of only 0.02°.The as-grown BP single crystal flake with smooth cleavage plane can be easily exfoliated into large scale ***-effect transistors fabricated based on the BP by such approach show excellent performance including reliable carrier mobility up to 1150 cm^(2) V^(−1) s^(−1) and on/off current ratio of~10^(6)at 15 *** approach is also applicable to various doped-BP,such as As-BP,Se-BP,Te-BP,*** ability to grow centimeter-sized BP single crystal flakes in high yield will accelerate the research and applications of BP-based electronics and optoelectronics.

关键词： black phosphorus single crystal chemical vapor transport two-dimensional materials field-effect transistors

Recent progress on photoactive nonprecious transition-metal complexes

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Science china Chemistry 2025年第1期68卷 46-95页

作者： Zhong-Liang Gong Hong-Jie Zhang Yan Cheng Jianxun Liu Yuhan Ai Yaqin Li Zhihui Feng Qiong Zhang Shaolong Gong Yong Chen Chang-Jiang Yao Yuan-Yuan Zhu Liang-Jin Xu Yu-Wu Zhong CAS Key laboratory of Photochemistry Institute of ChemistryChinese Academy of SciencesBeijing 100190China State Key laboratory of Structural Cemistry Fujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou 350002China School of Chemistry and Chemical Engineering Anhui Key Laboratory of Advanced Catalytic Materials and Reaction EngineeringHefei University of TechnologyHefei 230009China State Key laboratory of Explosion Science and Safety Protection School of Mechatronical EngineeringBeijing Institute of TechnologyBeijing 100081China College of Chemistry and Molecular Sciences Hubei Key Lab on Organic and Polymeric Optoelectronic MaterialsWuhan UniversityWuhan 430072China School of Chemistry and Chemical Engineering Anhui UniversityHefei 230601China Key laboratory of Photochemical Conversion and Optoelectronic Materials&CAS-HKU Joint laboratory on New Materials Technical Institute of Physics and ChemistryChinese Academy of SciencesBeijing 100190China

Photoactive complexes of nonprecious transition metals,mainly including those in the first-row and partially the second-row of the Periodic table of elements,have received increasing attention in view of their low cost and long-term *** are recognized as promising alternatives to noble transition metal complex congeners that have been extensively studied in optoelectronic devices,artificial photosynthesis,photocatalysis,biodiagnostics,and therapeutics,*** review is devoted to a comprehensive summary on the classical and recent advances on photoactive nonprecious transition metal complexes,including photoactive Zr,V,Cr,Mo,and W complexes,Mn complexes and hybrids,Fe,Co,Ni,and Cu complexes,and Zn and Cd complexes and hybrids.A particular focus is given on the molecular design,modulation of photophysical and photochemical properties,and applications of the representative and lately-developed nonprecious metal *** addition,a perspective on the future development in this field is provided at the end of this review.

关键词： photoactive metal complexes earth-abundant metals nonprecious metal complexes luminescence photochemistry

Second-Order Controllability of Multi-Agent Systems with Multiple Leaders

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Communications in Theoretical Physics 2016年第5期65卷 585-592页

作者：刘波史运涛苏厚胜韩潇 College of Science North China University of Technology Key laboratory of Beijing for field-bus technology & automation North China University of Technology School of automation Key Laboratory of Image Processing and Intelligent Control of Education Ministry of ChinaHuazhong University of Science and Technology

This paper proposes a new second-order continuous-time multi-agent model and analyzes the controllability of second-order multi-agent system with multiple leaders based on the asymmetric *** paper considers the more general case:velocity coupling topology is different from location coupling *** sufficient and necessary conditions are presented for the controllability of the system with multiple *** addition,the paper studies the controllability of the system with velocity damping *** results are given to illustrate the correctness of theoretical results.

关键词： controllability second-order multi-agent systems multiple leaders asymmetric topology