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Modulation of electronic state in copper-intercalated 1T-TaS_(2)

Nano Research 2022年第5期15卷 4327-4333页

作者： Wenhao Zhang Degong Ding Jingjing Gao Kunliang Bu Zongxiu Wu Li Wang Fangsen Li Wei Wang Xuan Luo Wenjian Lu Chuanhong Jin Yuping Sun Yi Yin Zhejiang Province Key Laboratory of Quantum Technology and Device Department of PhysicsZhejiang UniversityHangzhou 310027China State Key Laboratory of Silicon Materials School of Materials Science and EngineeringZhejiang UniversityHangzhou 310027China Key Laboratory of Materials Physics Institute of Solid State PhysicsHFIPSChinese Academy of SciencesHefei 230031China Vacuum Interconnected Nanotech Workstation(Nano-X) Suzhou Institute of Nano-Tech and Nano-Bionics(SINANO)Chinese Academy of Sciences(CAS)Suzhou 215123China High Magnetic Field Laboratory HFIPSChinese Academy of SciencesHefei 230031China collaborative innovation center of advanced microstructures Nanjing UniversityNanjing 210093China

Intercalation is an effective method to modify physical properties and induce novel electronic states of transition metal dichalcogenide(TMD)***,it is difficult to reveal the microscopic electronic state evolution in the intercalated *** we successfully synthesize the copper-intercalated 1T-TaS_(2) and characterize the structural and electronic modification combining resistivity measurements,atomic-resolution scanning transmission electron microscopy(ADF-STEM),and scanning tunneling microscopy(STM).The intercalated Cu atom is determined to be directly below the Ta atom and suppresses the commensurate charge density wave(CCDW)*** specific electronic modulations are discovered in the near-commensurate(NC)CDW phase:the electron doping state near the defective star of Davids(SDs)in metallic domains and the spatial evolution of the Mott gap in insulating *** modulations reveal that intercalated Cu atoms act as a medium to enhance the interaction between intralayer SDs,in addition to the general charge transfer *** also solidifies the Mott foundation of the insulating gap in pristine *** intriguing electronic evolution in Cu-intercalated 1T-TaS_(2) will motivate further exploration of novel electronic states in the intercalated TMD materials.

关键词： intercalation scanning tunneling microscopy Mott insulator charge transfer electron doping

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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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electronic manipulation of near-field nanofocusing in few-layer graphene-based hybrid nanotips

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Chinese Optics Letters 2019年第7期17卷 78-82页

作者： Yanhong Dong Qing Yang Guangqing Du Feng Chen Xun Hou State Key Laboratory for Manufacturing System engineering and Key Laboratory of Photonics Technology for Information of Shaanxi Province School of Electronics&Information EngineeringXi'an Jiaotong UniversityXi’an 710049China school of Mechanical engineering Xi'an Jiaotong UniversityXi'an 710049China

In this Letter, we propose the electronic manipulation of localized surface plasmon resonance for active tuning in near-field *** theoretically studied the excited graphene tuning of the nanofocusing field in fewlayer graphene(FLG)-based hybrid *** is revealed that the normalized enhanced electric field can be significantly promoted to more than 300 *** is also observed that resonant peaks can be unprecedently modified by the electron state of excited graphene that is embedded in the *** shows the possibility of flexible tuning of plasmon resonances via controlling the electron excitation state of graphene for specific advanced near-field nanofocusing applications.

关键词： electronic manipulation near-field nanofocusing hybrid nanotips

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Immobilization of Oxyanions on the Reconstructed Heterostructure Evolved from a Bimetallic Oxysulfide for the Promotion of Oxygen Evolution Reaction

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Nano-Micro Letters 2023年第10期15卷 547-564页

作者： Kai Yu Hongyuan Yang Hao Zhang Hui Huang Zhaowu Wang Zhenhui Kang Yang Liu Prashanth W.Menezes Ziliang Chen Institute of Functional Nano and Soft Materials(FUNSOM) Jiangsu Key Laboratory for Carbon‑Based Functional Materials and DevicesJoint International Research Laboratory of Carbon‑Based Functional Materials and DevicesSoochow UniversitySuzhou 215123People’s Republic of China Department of Chemistry:Metalorganics and Inorganic Materials Technical University of BerlinStrase Des 17 Juni 135.Sekr.C210623 BerlinGermany Materials Chemistry Group for Thin Film Catalysis–CatLab Helmholtz-Zentrum Berlin fur Materialien und EnergieAlbert‑Einstein‑Str.1512489 BerlinGermany school of Physics and engineering Longmen LaboratoryHenan University of Science and TechnologyLuoyang 471023People’s Republic of China

Efficient and durable oxygen evolution reaction(OER)requires the electrocatalyst to bear abundant active sites,optimized electronic structure as well as robust component and mechanical ***,a bimetallic lanthanum-nickel oxysulfide with rich oxygen vacancies based on the La_(2)O_(2)S prototype is fabricated as a binder-free precatalyst for alkaline *** combination of advanced in situ and ex situ characterizations with theoretical calculation uncovers the synergistic effect among La,Ni,O,and S species during OER,which assures the adsorption and stabilization of the oxyanion SO_(4)^(2-)onto the surface of the deeply reconstructed porous heterostructure composed of confining Ni OOH nanodomains by La(OH)_3 *** coupling,confinement,porosity and immobilization enable notable improvement in active site accessibility,phase stability,mass diffusion capability and the intrinsic Gibbs free energy of oxygen-containing *** optimized electrocatalyst delivers exceptional alkaline OER activity and durability,outperforming most of the Ni-based benchmark OER electrocatalysts.

关键词： Lanthanum-nickel oxysulfide Rare earth metal Immobilization of oxyanions Structural reconstruction Oxygen evolution catalysis

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Coalition formation based on a task-oriented collaborative ability vector

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Frontiers of Information Technology & electronic engineering 2017年第1期18卷 139-148页

作者： Hao FANG Shao-lei LU Jie CHEN Wen-jie CHEN school of Automation Beijing Institute of Technology State Key Laboratory of Intelligent Control and Decision of Complex Systems

Coalition formation is an important coordination problem in multi-agent systems, and a proper description of collaborative abilities for agents is the basic and key precondition in handling this problem. In this paper, a model of task-oriented collaborative abilities is established, where five task-oriented abilities are extracted to form a collaborative ability vector. A task demand vector is also described. In addition, a method of coalition formation with stochastic mechanism is proposed to reduce excessive competitions. An artificial intelligent algorithm is proposed to compensate for the difference between the expected and actual task requirements, which could improve the cognitive capabilities of agents for human commands. Simulations show the effectiveness of the proposed model and the distributed artificial intelligent algorithm.

关键词： collaborative vector Task allocation Multi-agent system Coalition formation Artificial intelligence

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基于模式动物海兔的神经肽及受体研究

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中国科学：生命科学 2022年第3期52卷 387-402页

作者：张果郭施琪王慧莹李亚东蒋慧敏余可丁雪莹刘为佳许举平薛颖喻杨哲王健周海波景键南京大学生命科学学院南京大学生命科学高等研究院江苏省小核酸生物学和生物技术工程研究中心化学生命科学合作创新中心脑科学研究院医药生物技术国家重点实验室南京210023 南京大学电子科学与工程学院南京210023 鹏程实验室深圳518000 Department of Neuroscience and Friedman Brain Institute Icahn School of Medicine at Mount SinaiNew YorkNY 10029USA

神经肽广泛存在于动物的中枢神经系统和内分泌系统中,并作为细胞间信息传导的信号分子,在许多生理过程(如行为控制、体温调控、能量平衡、昼夜节律等)中起着重要的调控作用.本文主要关注在中枢神经系统中,控制特定行为的神经环路中的神... 详细信息

神经肽广泛存在于动物的中枢神经系统和内分泌系统中,并作为细胞间信息传导的信号分子,在许多生理过程(如行为控制、体温调控、能量平衡、昼夜节律等)中起着重要的调控作用.本文主要关注在中枢神经系统中,控制特定行为的神经环路中的神经元所释放的神经肽及其功能.由于脊椎动物的神经环路比较复杂,在特定的系统中研究清楚所有或大部分的神经肽种类及其功能具有很大的挑战性,因此神经科学家采用诸多无脊椎动物作为模式动物,用来发现新颖的神经肽及其受体,并研究这些神经肽和受体的功能.本文概述了神经肽的基本特征、作用方式及生理功能的研究方法,并着重对具有实验优势的软体动物——海兔的神经肽研究进展进行了综述.强调了神经肽/受体信号系统的多样性及其研究的挑战性.相信这些研究成果对包括哺乳动物在内的脊椎动物的神经肽功能和机制研究起到指导或借鉴作用.

关键词：神经肽神经肽受体模式动物海兔生理功能摄食位置移动

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