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Salt-assisted vapor-liquid-solid growth of high-quality ultrathin nickel oxide flakes for artificial synapses in image recognition applications

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Nano Research 2024年第5期17卷 4622-4630页

作者： Hui Zhang Zongjie Shen Alei Li Lin Wang Qinan Wang Yunfei Li Yunlei Zhong juntong zhu Yong Zhang Mengjiao Han Dan Tian Chun Zhao Lixing Kang Qingwen Li School of Physical Science and Technology Shanghai Tech UniversityShanghai 201210China Division of Advanced Materials Suzhou Institute of Nano-Tech and Nano-BionicsChinese Academy of SciencesSuzhou 215123China College of Energy Soochow Institute for Energy and Materials Innovationsand Key Laboratory of Advanced Carbon Materials and Wearable Energy Technologies of Jiangsu ProvinceSoochow UniversitySuzhou 215123China Songshan Lake Materials Laboratory Dongguan 523808China School of Advanced Technology Xi’an Jiaotong-Liverpool UniversitySuzhou 215123China College of Materials Science and Engineering Co-Innovation Center of Efficient Processing and Utilization of Forest ResourcesNanjing Forestry UniversityNanjing 210037China

Transition metal oxides have attracted intense interest owing to their abundant physical and chemical *** controlled preparation of large-area,high-quality two-dimensional crystals is essential for revealing their inherent properties and realizing high-performance ***,fabricating two-dimensional(2D)transition metal oxides using a general approach still presents substantial ***,we successfully achieve highly crystalline nickel oxide(NiO)flakes with a thickness as thin as 3.3 nm through the salt-assisted vapor-liquid-solid(VLS)growth method,which demonstrated exceptional stability under ambient *** explore the great potential of the NiO crystal in this work,an artificial synapse based on the NiO-flake resistive switching(RS)layer is ***-term and long-term synaptic behaviors are obtained with external *** artificial synaptic performance provides the foundation of the neuromorphic application,including handwriting number recognition based on artificial neuron network(ANN)and the virtually unsupervised learning capability based on generative adversarial network(GAN).This pioneering work not only paves new paths for the synthesis of 2D oxides in the future but also demonstrates the substantial potential of oxides in the field of neuromorphic computing.

关键词： nickel oxide(NiO)flakes vapor-liquid-solid(VLS)growth memristor synapse generative adversarial network(GAN)

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Observation of ambipolar photoresponse from 2D MoS_(2)/MXene heterostructure

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Nano Research 2021年第10期14卷 3416-3422页

作者： juntong zhu Hao Wang Liang Ma Guifu Zou College of Energy Soochow Institute for Energy and Materials Innovationsand Key Laboratory of Advanced Carbon Materials and Wearable Energy Technologies of Jiangsu ProvinceSoochow UniversitySuzhou 215006China Research Institute of Superconductor Electronics Nanjing UniversityNanjing 210023China School of Physical Sciences University of Chinese Academy of SciencesBeijing 100190China

Two-dimensional materials have been demonstrated as promising toolboxes for *** metal carbides and nitrides(MXenes),members of an emerging family of two-dimensional materials,have drawn extensive attention in optoelectronics owing to their excellent conductivity and tunable electronic ***,a photodetector based on the two-dimensional van der Waals heterostructure of Ti_(3)C_(2)T_(x)MXene and a MoS_(2)monolayer was constructed to observe the ambipolar photoresponse,which showed a positive photoresponse in the visible spectrum(500-700 nm)and a negative photoresponse at longer wavelengths(700-800 nm).The device exhibited a high negative responsivity of 1.9 A/W and a detectivity of 2.1×10^(10)Jones under 750 nm light *** experiments demonstrate that the negative photoresponse arises from the heterostructureinduced trap energy level,which confines the excited photoelectrons and leads to an inverse *** work demonstrates a unique optoelectronic phenomenon in MoS_(2)/MXene heterostructures and provides valuable insights into the development of new photodetection materials.

关键词： MXene MoS_(2) two-dimensional heterostructure photodetector ambipolar photoresponse

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二维半导体异质结MoS_(2)/MoSe_(2)中一维量子阱形成机制的电子显微学研究

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电子显微学报 2024年第1期43卷 29-37页

作者：庞靖博时金安李昂李林璇朱俊桐周武中国科学院大学物理科学学院北京100049

本文使用两步化学气相沉积法(chemical vapor deposition,CVD)成功合成了单层二维半导体MoS_(2)/MoSe_(2)面内异质结,通过扫描透射电子显微学(scanning transmission electron microscopy,STEM)对异质结中不同类型的量子阱进行了原子尺度结构和局域应力分析,探索了二维半导体材料中,不同结构特征处诱导形成一维量子阱结构的机理。主要包括:(1)晶格失配的二维半导体异质结界面处周期性位错阵列诱导形成的量子阱超晶格;(2)二维半导体晶格内非60°晶界所包含的周期性位错诱导形成周期可控的量子阱超晶格;(3)由连续4|8元环结构组成的60°晶界诱导形成的超长单一量子阱结构。

关键词： MoS_(2)/MoSe_(2)异质结位错应力量子阱低电压STEM

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计算机视觉技术在桥隧工程中的应用现状及展望

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工业建筑 2024年第9期54卷 209-218页

作者：杨兴宇陈光耀朱俊潼徐照东南大学土木工程学院南京211189 东南大学软件学院江苏苏州215000

桥隧工程是土建领域的重要分支,随着建筑数字化程度的提高和设备硬件的升级,计算机视觉已经成为桥隧工程中数字化发展的关键支撑技术。为系统全面地揭示计算机视觉在桥隧工程领域的研究热点和趋势,聚焦于计算机视觉在桥隧工程领域的应用... 详细信息

桥隧工程是土建领域的重要分支,随着建筑数字化程度的提高和设备硬件的升级,计算机视觉已经成为桥隧工程中数字化发展的关键支撑技术。为系统全面地揭示计算机视觉在桥隧工程领域的研究热点和趋势,聚焦于计算机视觉在桥隧工程领域的应用,利用知识图谱工具对相关文献进行可视化分析,并分别从图像处理与特征提取、目标检测与跟踪、目标分类与识别、三维重建与SLAM和智能分析与决策五个计算机视觉任务对其理论与应用技术进行系统性的总结归纳。在此基础上,还从数据集缺陷性、图像准确性、检测实时性、算法适用性四个方面出发,总结了目前研究难点,指出和探讨了应用难点解决方案,并对未来发展进行展望,为进一步研究与技术应用提供理论支撑。

关键词：计算机视觉桥隧工程工程管理信息技术施工技术

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Flexible cobalt phosphide network electrocatalyst for hydrogen evolution at all pH values

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Nano Research 2017年第3期10卷 1010-1020页

作者： Jianwen Huang Yanrong Li YufeiXia juntong zhu Qinghua Yi Hao Wang Jie Xiong Yinghui Sun Guifu Zou State Key Laboratory of Electronic Thin Film and Integrated Devices University of Electronic Science and Technology of China Chengdu 610054 China College of Physics Optoelectronics and Energy Institute of Chemical Power Sources & Collaborative Innovation Center of Suzhou Nano Science and Technology Soochow University Suzhou 215006 China

High-performance electrocatalysts for water splitting at all pH values have attracted considerable interest in the field of sustainable hydrogen evolution. Herein, we report an efficient electrocatalyst with a nanocrystalline cobalt phosphide （COP） network for water splitting in the pH range of 0-14. The novel flexible electrocatalyst is derived from a desirable nanocrystalline CoP network grown on a conductive Hastelloy belt. This kind of self-supported CoP network is directly used as an electrocatalytic cathode for hydrogen evolution. The nanocrystalline network structure results in superior performance with a low onset overpotential of N45 mV over a broad pH range of 0 to 14 and affords a catalytic current density of 100 mA-cm 2 even in neutral media. The CoP network exhibits excellent catalytic properties not only at extreme pH values （0 and 14） but also in neutral media （pH = 7）, which is comparable to the behavior of state-of-the-art platinum-based metals. The system exhibits an excellent flexible property and maintains remarkable catalytic stability during continuous 100-h-long electrolysis even after 100 cycles of bending/extending from 100° to 250°.

关键词： hydrogen evolution CoP network nanocrystalline flexible all-pH

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Defect engineering of molybdenum disulfide through ion irradiation to boost hydrogen evolution reaction performance

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Nano Research 2019年第7期12卷 1613-1618页

作者： Cheng Sun Peipei Wang Hao Wang Chuan Xu juntong zhu Yanxia Liang Ying Su Yining Jiang Wenqi Wu Engang Fu Guifu Zou Soochow Institute for Energy and Materials Innovations & Key Laboratory of Advanced Carbon Materials and Wearable Energy Technologies oj Jiangsu Province Soochow UniversitySuzhou 215006China State Key Laboratory of Nuclear Physics and Technology School of PhysicsPeking UniversityBeijing 100871China

The inert basal plane of molybdenum disulfide (MoS2) restrains its further hydrogen evolution reaction (HER) *** work attempts ion irradiation to activate inert basal plane of MoS2 nanosheet to improve its electrocatalytic *** results demonstrate the sulphur vacancies generated by ion irradiation on the basal plane of MoS2 mainly boost the efficiency of HER *** moderate fluence of carbon ion irradiation gains the optimum HER performance with an onset potential of 77 mV and Tafel slope of 66 mV/dec.

关键词： MoS2 nanosheet ion irradiation electrocatalyst hydrogen evolution reaction sulphur vacancy

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Spatially Bandgap-Graded Mo S2（1-x）Se2x Homojunctions for Self-Powered Visible–Near-Infrared Phototransistors

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Nano-Micro Letters 2020年第2期12卷 185-198页

作者： Hao Xu juntong zhu Guifu Zou Wei Liu Xiao Li Caihong Li Gyeong Hee Ryu Wenshuo Xu Xiaoyu Han Zhengxiao Guo Jamie HWarner Jiang Wu Huiyun Liu Department of Electronic and Electrical Engineering University College LondonTorrington PlaceLondon WC1E 7JEUK School of Energy Soochow Institute for Energy and Materials Innovationsand Key Laboratory of Advanced Carbon Materials and Wearable Energy Technologies of Jiangsu ProvinceSoochow UniversitySuzhou 215006People’s Republic of China London Centre for Nanotechnology University College LondonLondon WC1H 0AHUK Institute of Fundamental and Frontier Sciences University of Electronic Science and Technology of ChinaChengdu 610054People’s Republic of China Department of Materials University of OxfordParks RoadOxford OX13PHUK Department of Chemistry University College London20 Gordon StBloomsburyLondon WC1H 0AJUK Department of Chemistry The University of Hong KongPokfulam RoadHong KongPeople’s Republic of China Zhejiang Institute of Research and Innovation The University of Hong KongQingshan Lake SciTech CityHangzhouPeople’s Republic of China

Ternary transition metal dichalcogenide alloys with spatially graded bandgaps are an emerging class of two-dimensional materials with unique features,which opens up new potential for device ***,visible–near-infrared and self-powered phototransistors based on spatially bandgap-graded MoS2(1−x)Se2x alloys,synthesized by a simple and controllable chemical solution deposition method,are *** graded bandgaps,arising from the spatial grading of Se composition and thickness within a single domain,are tuned from 1.83 to 1.73 eV,leading to the formation of a homojunction with a builtin electric ***,a strong and sensitive gate-modulated photovoltaic effect is demonstrated,enabling the homojunction phototransistors at zero bias to deliver a photoresponsivity of 311 mA W−1,a specific detectivity up to^10^11 Jones,and an on/off ratio up to^10^***,when illuminated by the lights ranging from 405 to 808 nm,the biased devices yield a champion photoresponsivity of 191.5 A W−1,a specific detectivity up to^1012 Jones,a photoconductive gain of 10^6–10^7,and a photoresponsive time in the order of^50 *** results provide a simple and competitive solution to the bandgap engineering of two-dimensional materials for device applications without the need for p–n junctions.

关键词： Transition metal dichalcogenides Graded bandgaps Homojunctions Phototransistors Self-powered

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Non-epitaxial growth of highly oriented transition metal dichalcogenides with density-controlled twin boundaries

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The Innovation 2023年第6期4卷 30-37页

作者： juntong zhu Zhili Hu Shasha Guo Ruichun Luo Maolin Yu Ang Li Jingbo Pang Minmin Xue Stephen J.Pennycook Zheng Li zhuhua Zhang Wu Zhou School of Physical Sciences CAS Key Laboratory of Vacuum PhysicsUniversity of Chinese Academy of SciencesBeijing 100049China State Key Laboratory of Mechanics and Control for Aerospace Structures Key Laboratory for Itelligent Nano Materials and Devices of Ministry of Educationand Institute for Frontier ScienceNanjing University of Aeronautics and AstronauticsNanjing 210013China School of Materials Science and Engineering Nanyang Technological UniversitySingapore 639798Singapore Environmental Chemistry and Materials Centre Nanyang Environment and Water Research InstituteNanyang Technological UniversitySingapore 637141Singapore

Twin boundaries(TBs)in transition metal dichalcogenides(TMDs)constitute distinctive one dimensional electronic systems,exhibiting intriguing physical and chemical properties that have garnered significant attention in the fields of quantum physics and ***,the controlled manipula-tion of TBs in terms of density and specific atomic configurations remains a fomidable *** this study,we present a non-epitaxial growth approach that enables the controlled and large scale fabrication of homoge-neous catalytically active TBs in monolayer TMDs on arbitrary ***,the density achieved using this strategy is six times higher than that observed in convention chemical vapor deposition(CVD)-grown *** rigorous experimental analysis and multigrain Wulff construc tion simulations,we elucidate theroleof regulating themetal source diffusion process,which serves as the key factor for inducing the self-oriented growth ofTMD grains and the formation of unified ***,we demonstrate that this novel growth mode can be readily incorporated into the conventional CVD growth method by making a simple modification of the growth tempera-ture profle,thereby offering a universal approach for engineering of grain boundaries in two-dimensional materials.

关键词： grain transition tempera

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突发事件网络舆情危机的生成机理研究——基于21个突发事件网络舆情案例的fsQCA分析

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情报探索 2022年第3期 40-48页

作者：朱珺彤单晓红北京工业大学经济管理学院北京100124

[目的/意义]识别突发事件网络舆情危机的动因,掌握其生成机理,有助于突发事件发生时,准确预警舆情危机,采取有效应对策略。[方法/过程]运用fsQCA方法,从公众、话题、媒体和传播四个维度对舆情危机的生成路径进行探析。[结果/结论]突发... 详细信息

[目的/意义]识别突发事件网络舆情危机的动因,掌握其生成机理,有助于突发事件发生时,准确预警舆情危机,采取有效应对策略。[方法/过程]运用fsQCA方法,从公众、话题、媒体和传播四个维度对舆情危机的生成路径进行探析。[结果/结论]突发事件情境下,容易引发“权威媒体缺失型”“高速传播主导型”和“话题信任缺失型”三种舆情危机。因此,提高权威媒体的积极参与,确保话题来源的可靠性,监控话题传播速度是有效应对舆情危机的策略。

关键词：突发事件网络舆情危机生成机理 fsQCA

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听障儿童青少年焦虑或抑郁情绪心理干预效果的系统综述

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中国康复理论与实践 2023年第9期29卷 1004-1011页

作者：张婧雅邹敏孙宏伟孙昌隆朱峻同潍坊医学院心理学院山东潍坊市261053 中国ICF研究院山东潍坊市261053

目的系统综述心理干预对听障儿童青少年焦虑和抑郁情绪的效果。方法采用主题词方法,在PubMed、Web of Science、Embase、中国知网和万方数据库检索听障儿童青少年焦虑、抑郁情绪问题心理干预的相关文献,时间为建库至2023年7月。筛选... 详细信息

目的系统综述心理干预对听障儿童青少年焦虑和抑郁情绪的效果。方法采用主题词方法,在PubMed、Web of Science、Embase、中国知网和万方数据库检索听障儿童青少年焦虑、抑郁情绪问题心理干预的相关文献,时间为建库至2023年7月。筛选文献并提取作者、国家、研究对象、研究设计、干预方式、结局指标、测量工具。结果最终纳入8篇文献,来自3个国家,包含8项随机对照试验,涉及404例被试,发表日期主要集中在2013年至2023年。心理干预方式包括家庭支持教育、情绪智力训练、认知行为疗法、自信团体训练和游戏治疗等。干预效果包括有效改善社交焦虑情绪,降低听障儿童青少年的焦虑和抑郁水平。结论心理干预可以有效缓解听障儿童青少年的焦虑和抑郁情绪。

关键词：儿童青少年听力障碍焦虑抑郁干预系统综述

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