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Realization of flexible in-memory computing in a van der Waals ferroelectric heterostructure tri-gate transistor

Nano Research 2024年第3期17卷 1886-1892页

作者： Xinzhu Gao Quan chen Qinggang Qin Liang Li Meizhuang Liu Derek Hao Junjie Li Jingbo Li Zhongchang Wang zuxin chen School of Semiconductor Science and Technology South China Normal UniversityFoshan 528225China Guangdong Provincial Key Laboratory of Chip and Integration Technology Guangzhou 510631China Institute of Solid State Physics Hefei Institutes of Physical Science Chinese Academy of SciencesHefei 230601China School of Science STEM CollegeRMIT UniversityMelbourne 3000Australia CAS Key Laboratory of Functional Materials and Devices for Special Environments Xinjiang Technical Institute of Physics&ChemistryChinese Academy of SciencesUrumqi 830011China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China College of Optical Science and Engineering Zhejiang UniversityHangzhou 310027China International Iberian Nanotechnology Laboratory(INL) Av.Mestre Jose Veiga s/nBraga 4715-330Portugal

Combining logical function and memory characteristics of transistors is an ideal strategy for enhancing computational efficiency of transistor ***,we rationally design a tri-gate two-dimensional(2D)ferroelectric van der Waals heterostructures device based on copper indium thiophosphate(CuInP_(2)S_(6))and few layers tungsten disulfide(WS_(2)),and demonstrate its multi-functional applications in multi-valued state of data,non-volatile storage,and logic *** co-regulating the input signals across the tri-gate,we show that the device can switch functions flexibly at a low supply voltage of 6 V,giving rise to an ultra-high current switching ratio of 107 and a low subthreshold swing of 53.9 mV/*** findings offer perspectives in designing smart 2D devices with excellent functions based on ferroelectric van der Waals heterostructures.

关键词： two-dimensional(2D)ferroelectric heterostructure tri-gate polymorphic regulation in-memory computing

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Ultrafast growth of high-quality large-sized GaSe crystals by liquid metal promoter

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Nano Research 2022年第5期15卷 4677-4681页

作者： zuxin chen Quan chen Zebing Chai Bin Wei Jun Wang Yanping Liu Yumeng Shi Zhongchang Wang Jingbo Li Institute of semiconductors South China Normal UniversityGuangzhou 510631China School of Materials Sun Yat-Sen UniversityGuangzhou 510275China School of Electrical Engineering and Automation Wuhan UniversityWuhan 430000China School of Physics and Electronics Hunan Key Laboratory for Super-microstructure and Ultrafast ProcessCentral South University932 South Lushan RoadChangsha 410083China Engineering Technology Research Center for 2D Material Information Function Devices and Systems of Guangdong Province International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology of Ministry of EducationInstitute of Microscale OptoelectronicsShenzhen UniversityShenzhen 518060China International Iberian Nanotechnology Laboratory(INL) 4715–330 BragaPortugal

Growth of high-quality large-sized crystals using the traditional chemical vapor transport(CVT)or vertical Bridgman(VB)technique is costly and time-consuming,limiting its practical industrial ***,we propose an ultrafast crystal growth process with low energy consumption and capability of producing crystals of excellent quality,and demonstrate that large-sized GaSe crystals with a lateral size of 0.5 to 1 cm can be obtained within a short period of 5 min.X-ray diffraction(XRD)and scanning transmission electron microscopy(STEM)studies clearly indicate that the as-grown crystals have a good *** further show the potential application of the resulting GaSe crystals,we fabricate the few-layer GaSe-based photodetector,which exhibits low dark current of 21 pA and fast response of 34 ms under 405 nm *** proposed technique for rapid crystal growth could be further extended to other metallenes with low-melting point,such as Bi-,Sn-,In-,Pb-based crystals,opening up a new avenue in fulfilling diverse potential optoelectronics applications of two-dimensional(2D)crystals.

关键词： GaSe ultrafast growth photodetector liquid metal

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常德市柳叶湖表层沉积物重金属元素分布特征及潜在生态风险评价

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环境污染与防治 2024年第2期46卷 233-239,290页

作者：王苏铭程雅柔牟志勇梁小红李帅陈祖新万鑫邵萍湖南省常德生态环境监测中心湖南常德415000 国家环境保护重金属污染监测重点实验室湖南长沙410019

柳叶湖表层沉积物中重金属的状况对洞庭湖流域生态环境具有重要影响。对该区域内31个采样点表层沉积物中重金属的含量及形态进行监测和分析,同时采用潜在生态风险指数法和健康风险评价模型进行风险评价。结果表明:(1)重金属平均值均高... 详细信息

柳叶湖表层沉积物中重金属的状况对洞庭湖流域生态环境具有重要影响。对该区域内31个采样点表层沉积物中重金属的含量及形态进行监测和分析,同时采用潜在生态风险指数法和健康风险评价模型进行风险评价。结果表明:(1)重金属平均值均高于洞庭湖水系水体沉积物重金属元素背景值。参考《土壤环境质量标准农用地土壤污染风险管控标准(试行)》(GB 15618—2018),Cd可能存在污染风险。(2)Cd、Cr、Pb、Cu、Zn、Ni来源相似,Mn有单独的来源,As有多个来源。(2)表层沉积物中As、Cr、Cu、Zn、Ni主要以残渣态为主,Cd和Mn主要是以弱酸可提取态和可还原态为主,Pb主要以可还原态为主。(3)Cd的单项潜在生态风险指数为57.0,属于中等风险,其他7种重金属均属于轻微风险。8种重金属的综合潜在生态风险指数为100.8,属于轻微风险。(4)成人、儿童的致癌、非致癌总风险处于可接受范围,且儿童的致癌、非致癌总风险指数均高于成人。As的致癌风险指数大于Cd;Zn的非致癌风险指数最低,而Cr最高。

关键词：表层沉积物重金属分布特征潜在生态风险

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Boosting acidic water oxidation performance by constructing arrays-like nanoporous Ir_(x)Ru_(1−x)O_(2) with abundant atomic steps

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Nano Research 2022年第7期15卷 5933-5939页

作者： Junjie Li Zan Lian Qiang Li Zhongchang Wang Lifeng Liu Francis Leonard Deepak Yanping Liu Bo Li Junyuan Xu zuxin chen CAS Key Laboratory of Functional Materials and Devices for Special Environments Xinjiang Technical Institute of Physics&ChemistryChinese Academy of SciencesUrumqi 830011China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China International Iberian Nanotechnology Laboratory(INL) Braga 4715-330Portugal Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China School of Mechanical Engineering University of Shanghai for Science and TechnologyShanghai 200093China School of Physics and Electronics Hunan Key Laboratory for Super-microstructure and Ultrafast ProcessCentral South UniversityChangsha 410083China Laboratory of Advanced Spectro-electrochemistry and Li-ion Batteries Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023China Institute of Semiconductors South China Normal UniversityGuangzhou 510631China

The fabrication of electrocatalysts with high activity and acid stability for acidic oxygen evolution reaction(OER)is an urgent need,yet extremely ***,we report the design and successful fabrication of a high performance self-supported cogwheel arrays-like nanoporous Ir_(x)Ru_(1−x)O_(2) catalyst with abundant atomic steps for acidic OER using a facile alloy-spinningelectrochemical activation method that allows large-scale *** obtained Ir_(x)Ru_(1−x)O_(2) catalysts merely need overpotentials of 211 and 295 mV to deliver catalytic current densities of 10 and 300 mA·cm^(−2) in 0.5 M H_(2)SO_(4),respectively,and can sustain constant OER electrolysis for at least 140 h at a high current density of 300 mA·cm^(−2).Further density functional theory(DFT)calculations uncover that such high intrinsic activities mainly originate from the largely exposed high-index atomic step planes,which markedly lower the limiting potential of the rate-determining step(RDS)of *** findings provide an insight into the exploration of high performance electrocatalysts,and open up an avenue for further developing the state-of-theart Ir and/or Ru-based catalysts for large-scale practical applications.

关键词： oxygen evolution reaction(OER)electrolysis nanoporous structure Ir_(x)Ru_(1−x)O_(2) defects atomic steps

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Identification of high oxygen-consuming substances in stormwater drainage systems illicitly connected with sewage system

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Journal of Environmental Sciences 2024年第4期138卷 132-140页

作者： chen Xu zuxin Xu Wenhai Chu Shanshan Wu Rong Xiao Lei Su State Key Laboratory of Pollution Control and Resource Reuse College of Environmental Science and EngineeringTongji UniversityShanghai 200092China Ministry of Education Key Laboratory of Yangtze River Water Environment Tongji UniversityShanghai 200092China Guangzhou Resource Environmental Protection Technology Co. Ltd.Guangzhou 510030China

The dissolved oxygen content in water is an important indicator for assessing the quality of the water environment,and maintaining a certain amount of dissolved oxygen is essential for the healthy development of the ecological *** a water body is anoxic,the activity of anaerobic microorganisms increases and organic matter is decomposed to produce a large number of blackening and odorizing substances,resulting in black and odorous water bodies,which is a very common and typical phenomenon in ***,there is still a relatively universal occurrence of illicitly connected stormwater and sewage pipes in the urban drainage pipe network in China,which makes oxygen-consuming substances be directly discharged into rivers through stormwater pipes and consume the dissolved oxygen in the water bodies,resulting in an oxygen deficiency of the *** induces seasonal or year-round black and stink phenomena in urban ***,identifying high oxygen-consuming substances,which lays the foundation for the subsequent removal of oxygen-consuming substances,is *** a series of comparisons of water quality indicators and analysis of organic characteristics,it was found that the oxygen consumption capacity of domestic sewage was higher than that of industrial wastewater in the selected area of this study,and the oxygen-consuming substances of domestic sewage were small molecular amino *** comparing 20 conventional free amino acids,it was found that seven of them consumed oxygen easily,and compared with chemical oxygen consumption,biological oxygen consumption was in a leading position.

关键词： Urban drainage system Oxygen-consuming substances Domestic sewage Amino acid

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In-situ sludge reduction based on Mn^(2+)-catalytic ozonation conditioning:Feasibility study and microbial mechanisms

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Journal of Environmental Sciences 2024年第1期135卷 185-197页

作者： Haozhe Huang Tingting Wei Hui Wang Bing Xue Sisi chen Xiankai Wang Haibin Wu Bin Dong zuxin Xu College of Environmental Science and Engineering Tongji UniversityShanghai 200092China YANGTZE Eco-Environment Engineering Research Center China Three Gorges CorporationBeijing 100038China

To improve the sludge conditioning efficiency without increasing the ozone dose,an in-situ sludge reduction process based on Mn^(2+)-catalytic ozonation conditioning was *** ozone conditioning alone as a control,a lab-scale sequencing batch reactor coupled with ozonated sludge recycle was evaluated for its operating performance at an ozone dose of 75 mg O_(3)/g VSS and 1.5 mmol/L Mn^(2+)*** results showed a 39.4%reduction in MLSS and an observed sludge yield of 0.236 kg MLSS/kg COD for the O_(3)+Mn^(2+)group compared to the O_(3)group (15.3%and 0.292 kg MLSS/kg COD),accompanied by better COD,NH_(4)^(+)-N,TN and TP removal,improved effluent SS and limited impact on excess sludge ***,activity tests,BIOLOG ECO microplates and 16S rRNA sequencing were applied to elucidate the changing mechanisms of Mn^(2+)-catalytic ozonation related to microbial action:(1) Dehydrogenase activity reached a higher peak.(2) Microbial utilization of total carbon sources had an elevated effect,up to approximately 18%,and metabolic levels of six carbon sources were also increased,especially for sugars and amino acids most pronounced.(3) The abundance of Defluviicoccus under the phylum Proteobacteria was enhanced to 12.0%and dominated in the sludge,they had strong hydrolytic activity and metabolic *** bacteria of the genus Ferruginibacter also showed an abundance of 7.6%,they contributed to the solubilization and reduction of sludge *** results could guide researchers to further reduce ozonation conditioning costs,improve sludge management and provide theoretical support.

关键词： Activated sludge In-situ reduction Catalytic ozonation conditioning Dehydrogenase activity Carbon source utilization Microbial community

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Recent advances of SiO_(x)-based anodes for sustainable lithium-ion batteries

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Nano Research Energy 2023年第3期2卷 66-88页

作者： Mengyu Zhang Naiwen Liang Derek Hao zuxin chen Fan Zhang Jiang Yin Yahui Yang Li-shan Yang Key Laboratory of Chemical Biology&Traditional Chinese Medicine Research(Ministry of Education of China) National and Local Joint Engineering Laboratory for New Petrochemical Materials and Fine Utilization of ResourcesKey Laboratory of the Assembly and Application of Organic Functional Molecules of Hunan ProvinceHunan Normal UniversityChangsha 410081China School of Science STEM CollegeRMIT UniversityMelbourne 3000Australia School of Semiconductor Science and Technology South China Normal UniversityFoshan 528225China International Iberian Nanotechnology Laboratory(INL) 4715-330 BragaPortugal

The world is facing an ever-growing global energy crisis with unprecedented depth and *** sustainable development of high energy density lithium-ion batteries for electric vehicles and portable electric devices has become a feasible way to deal with this *** suboxides(SiO_(x))have been deemed as one of the most promising anode materials because of their ultrahigh theoretical lithium storage capacity,proper working potential,natural abundance,and environmental ***,the mass utilization of SiO_(x)-based anodes is severely obstructed by their low electrical conductivity and inevitable volume *** lithium silicate and lithium oxide formed in the first lithiation process act as buffer layers to some extent,it is urgent to address the accompanying low initial Coulombic efficiency and unsatisfactory cycling *** this review,we summarized recent advances in the synthesis methods of SiO_(x)-based ***,the benefits and shortcomings of the various methods are briefly ***,we discussed the effective combination of SiO_(x) with carbon materials and designs of porous structure,which could considerably enhance the electrochemical performance in ***,progresses on the modified strategies,advanced characteristics and industrial applications for SiO_(x)-based anodes are also ***,the remaining challenges encountered and future perspectives on SiO_(x)-based anodes are highlighted.

关键词： SiO_(x)anodes lithium-ion batteries synthesis methods SiO_(x)/C composites porous

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三功能共晶溶剂添加剂用于高性能锂金属电池

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Science Bulletin 2024年第11期69卷 1686-1696页

作者：方文强温祖鑫王锋霖陈龙张颖张宁刘小鹤陈根 School of Materials Science and Engineering Key Laboratory of Electronic Packaging and Advanced Functional Materials of Hunan ProvinceCentral South UniversityChangsha 410083China Zhongyuan Critical Metals Laboratory School of Chemical EngineeringZhengzhou UniversityZhengzhou 450001China

Rational carbonate electrolyte chemistry is critical for the development of high-voltage lithium metal batteries(LMBs).However,the implementation of traditional carbonate electrolyte is greatly hindered by the generation of an unstable electrode interphase and corrosive by-product(HF).Herein,we propose a triple-function eutectic solvent additive of N-methylacetamide(NmAc)with LiNO_(3) to enhance the stability and compatibility of carbonate ***,the addition of NmAc significantly improves the solubility of LiNO_(3) in carbonate electrolyte by forming an eutectic pair,which regulates the Li~+solvation structure and leads to dense and homogenous Li ***,the hydrolysis of acidic PF_5 is effectively alleviated due to the strong complexation of NmAc with PF_5,thus reducing the generation of corrosive *** addition,the optimized cathode electrolyte interphase layer decreases the structural degradation and transition metal ***,Li||LiNi_(0.6)Co_(0.2)Mn_(0.2)O_(2)(NCM622)cells with the designed electrolyte deliver superior long-term cycle reversibility and excellent rate *** study unveils the rationale for incorporating eutectic solvent additives within carbonate electrolytes,which significantly contribute to the advancement of their practical application for high-voltage LMBs.

关键词： Eutectic solvent additive Solvation structure Interfacial chemistry PF_5 capturer Lithium metal battery

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光学显微图像定量评价方法及应用研究进展(特邀)

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激光与光电子学进展 2024年第6期61卷 216-232页

作者：王瑾张祖鑫陈勰宇董建杰匡翠方刘文杰之江实验室浙江杭州311121 浙江大学光电科学与工程学院极端光学技术与仪器全国重点实验室浙江杭州310027

作为工业数字图像质量评价在应用领域的重要延伸,光学显微图像定量评价主要通过对图像特征和属性进行分析计算,针对性地量化评估图像的质量。近年来,随着各类光学显微成像技术的蓬勃发展,图像定量化评价的重要性日益凸显,在总体图像处... 详细信息

作为工业数字图像质量评价在应用领域的重要延伸,光学显微图像定量评价主要通过对图像特征和属性进行分析计算,针对性地量化评估图像的质量。近年来,随着各类光学显微成像技术的蓬勃发展,图像定量化评价的重要性日益凸显,在总体图像处理中具有指导性作用。对现有的光学显微图像定量评价指标及相关算法进行总结,对各个算法的模型结构和性能表现进行讨论说明,阐述显微图像定量评价的应用和发展趋势,并对该领域目前所存在的问题和难点进行分析和展望。

关键词：光学显微图像定量评价分辨率信噪比结构相似度

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聚氯化铝及其在工业废水处理中的应用与展望

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上海环境科学 2003年第5期22卷 353-357页

作者：徐祖信陈璇李霞同济大学环境科学与工程学院上海200092

目前,传统无机凝聚剂正逐渐被无机高分子絮凝剂所取代。系统阐述了聚氯化铝的基本性质、絮凝形态、混凝行为和混凝机理。介绍了聚氯化铝在9种工业废水处理中的应用。对聚氯化铝的研究发展方向作了展望。

关键词：无机高分子絮凝剂聚氯化铝工业废水废水处理混凝机理

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