检索结果-南通市图书馆

Science China Chemistry 2025年

作者： Kang Huang Jiapeng Hu Jicun Cao Xinmin Wei Shihao Liu Qiming Dai Fei Shen Xinyang Zhang Xiaohui Zhao Yang Peng Zhao Deng Yizhong Huang School of Optical and electronic Information&jiangsu/Suzhou key laboratory of Biophotonics&International Joint Metacenter for advanced photonics and electronics Suzhou City University Soochow Institute for Energy and materials Innovations College of EnergyKey Laboratory of Advanced Carbon Materials and Wearable Energy Technologies of Jiangsu ProvinceSoochow University Suzhou Derby electronic Material Technology Co.Ltd. School of materials Science and Engineering Nanyang Technological University

Flexible Zn-air batteries （ZABs） are considered one of the most promising energy storage systems in wearable electronic *** key component in the flexible ZABs is the air cathode,which hosts the reversible electrocatalytic oxygen evolution reaction （OER） and oxygen reduction reaction （ORR） to attain long-term *** the present work,combining the advantage of the electrospinning technique and biomass-derived heteroatomic porous carbon,Fe2P/Co2P heterojunctions supported on N,P co-doped porous carbon are prepared,exhibiting excellent electrocatalytic OER/ORR performances,which is better than the commercial electrocatalysts based on noble ***,the flexible aqueous ZABs as fabricated present remarkable charge and discharge rates,power density,volumetric energy density,folding durability,as well as long-term operational *** initiating a novel route toward the design and development of air cathode electrode materials,this work paves the way for the practical deployment of flexible ZABs.

关键词：

Five-user quantum virtual local area network with an AlGaAs entangled photon source

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Science China(Physics,Mechanics & Astronomy) 2025年第3期68卷 61-73页

作者： Cheng Qian Hongkai Tian Xu Jing Yichen Liu Zhe Chen Huiran Luo Yuan Du Xiaodong Zheng Tangsheng Chen Yuechan Kong Hua-Lei Yin Dong Jiang Bin Niu Liangliang Lu key laboratory of State Manipulation and advanced materials in provincial Universities School of Physical Science and TechnologyNanjing Normal UniversityNanjing210023China School of Internet Anhui UniversityHefei230039China National key laboratory of Solid-State Microwave Devices and Circuits Nanjing Chip Valley Industrial Technology InstituteNanjing Electronic Devices InstituteNanjing210016China Research Center for Quantum Optics and Quantum Communication School of ScienceQingdao University of TechnologyQingdao266520China Department of Physics and Beijing key laboratory of Opto-electronic Functional materials and Micro-nano Devices Key Laboratory of Quantum State Construction and Manipulation(Ministry of Education)Renmin University of ChinaBeijing100872China Beijing Academy of Quantum Information Sciences Beijing100193China National Engineering Research Center of Agro-Ecological Big Data Analysis and Application Anhui UniversityHefei230601China National laboratory of Solid-State Microstructures and School of Physics Nanjing UniversityNanjing210093China Hefei National laboratory Hefei230088China

The promotion of quantum network applications demands the scalable connection of quantum *** is preferable to set up multiple logical networks coexisting on a single physical network infrastructure to accommodate a larger number of *** we present a quantum virtual network architecture that offers this level of scalability,without being constrained to a fixed physical-layer network relying solely on passive multiplexing *** architecture can be understood as arising from the superposition of a fully connected entanglement distribution network and port-based virtual local area network,which group multiusers by access *** terms of hardware,we leverage a semiconductor chip with a high figure-of-merit modal overlap to directly generate high-quality polarization entanglement,and a streamlined polarization analysis module,which requires only one single-photon detector for each end *** experimentally perform the BBM92 QKD protocol on the five-user quantum virtual network and demonstrate voice and image encryption on a campus area *** results may provide insights into the realization of large-scale quantum networks with integrated and cost-efficient photonic architecture.

关键词： quantum network quantum entanglement distribution integrated photonics image and voice encryption

维普期刊数据库

Ferromagnetism of Ni-Doped ZnO Powders Prepared by Sol-Gel Method above Room Temperature

在线全文

学校读者我要写书评

暂无评论

Journal of Rare Earths 2006年第z1期24卷 186-188页

作者： Li Binbin Zhang Rong Xiu Xiangqian Tao Zhikuo Chen Lin Xie Zili Zheng Youdou Yu Huiqiang jiangsu provincial key laboratory of advanced photonic and electronic materials Department of Physics Nanjing University Nanjing 210093 China Jiangsu Provincial Key Laboratory of Advanced Photonic and Electronic Materials Department of Physics Nanjing University Nanjing 210093 China Jiangsu Provincial Key Laboratory of Advanced Photonic and Electronic Materials Department of Physics Nanjing University Nanjing 210093 China Jiangsu Provincial Key Laboratory of Advanced Photonic and Electronic Materials Department of Physics Nanjing University Nanjing 210093 China Jiangsu Provincial Key Laboratory of Advanced Photonic and Electronic Materials Department of Physics Nanjing University Nanjing 210093 China Jiangsu Provincial Key Laboratory of Advanced Photonic and Electronic Materials Department of Physics Nanjing University Nanjing 210093 China Jiangsu Provincial Key Laboratory of Advanced Photonic and Electronic Materials Department of Physics Nanjing University Nanjing 210093 China Modern Analysis Center Nanjing University Nanjing 210093 China

The magnetic and structural properties of 2% Ni-doped ZnO powers prepared by sol-gel method were studied. X-ray diffraction (XRD) and high resolution transmission electron microscopy (HRTEM) of the sample do not show existence of any signal of second phase. The X-photoelectron spectroscopy (XPS) of the sample shows the chemical valence of Ni is +2 and the real Ni concentration is 2.19% determined by X-ray fluorescence spectra (XRFS). The magnetic property performed with superconducting quantum interference device (SQUID) shows that the sample exhibits ferromagnetism above room temperature and the Curie temperature (TC) is about 600 K.

关键词： sol-gel Ni-doped ZnO powder ferromagnetism

Breakdown characteristics of AlGaN/GaN Schottky barrier diodes fabricated on a silicon substrate

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Physics B 2014年第9期23卷 414-418页

作者：蒋超陆海陈敦军任芳芳张荣郑有炓 jiangsu provincial key laboratory of advanced photonic and electronic materials and School of Electronic Science and EngineeringNanjing University

In this work, the breakdown characteristics of AlGaN/GaN planar Schottky barrier diodes （SBDs） fabricated on the silicon substrate are investigated. The breakdown voltage （BV） of the SBDs first increases as a function of the anodeto-cathode distance and then tends to saturate at larger inter-electrode spacing. The saturation behavior of the BV is likely caused by the vertical breakdown through the intrinsic GaN buffer layer on silicon, which is supported by the post-breakdown primary leakage path analysis with the emission microscopy. Surface passivation and field plate termination are found effective to suppress the leakage current and enhance the BV of the SBDs. A high BV of 601 V is obtained with a low on-resistance of 3.15 mΩ·cm^2.

关键词： AlGaN/GaN Schottky barrier diodes silicon substrate breakdown

维普期刊数据库

Phase transformation of two-dimensional nanomaterials: state-of-the-art progress in designing strategies and catalytic applications

在线全文

学校读者我要写书评

暂无评论

Science China materials 2025年第1期68卷 65-85页

作者： Zeqi Wu Feng Niu Da Chen Yuexiang Huang Guigao Liu Yong Zhou Wenguang Tu Xi Zhu Zhigang Zou College of materials and Chemistry China Jiliang UniversityHangzhou 310018China School of Science and Engineering The Chinese University of Hong Kong(Shenzhen)Shenzhen 518172China National Special Superfine Powder Engineering Research Center School of Chemistry and Chemical EngineeringNanjing University of Science and TechnologyNanjing 210094China jiangsu key laboratory for Nano Technology National Laboratory of Solid State MicrostructuresCollaborative Innovation Center of Advanced MicrostructuresSchool of PhysicsNanjing UniversityNanjing 210093China

Phase transformation of two-dimensional(2D)nanomaterials can lead to significant changes in electronic and optical properties,which enables the development of novel *** strategies for phase engineering of 2D nanomaterials have drawn considerable attention in recent *** review focuses on the state-of-the-art progress in the phase transformation of 2D nanomaterials and their catalytic ***,the basic concepts of phase transformation and the outstanding electronic and optical properties induced by phase transformation are briefly ***,different strategies for achieving phase transformation are discussed in detail and classified into several types based on their characteristics,including(i)doping,(ii)external fields,(iii)optical irradiation,(iv)strain effect,(v)high-energy particle excitation,and(vi)thermal *** applications of 2D nanomaterials in catalysis based on phase transformation have also been ***,a summary of the technical challenges to phase control in 2D nanomaterials and potential opportunities for developing novel applications is presented.

关键词： phase transformation two-dimensional nanomaterials strategy catalysis application

Synthesis of [100] Wurtzite InN Nanowires and [011] Zinc-Blende InN Nanorods

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Physics Letters 2008年第5期25卷 1780-1783页

作者：聂超张荣谢自力修向前刘斌傅德颐刘启佳韩平顾书林施毅郑有炓 jiangsu provincial key laboratory of advanced photonic and electronic materials and Department of Physics Nanjing University Nanjing 210093

One-dimensional wurtzite InN nanowires and zincblende InN nanorods are prepared by chemical vapour deposition （CVD） method on natural cleavage plane （110） of GaAs. The growth direction of InN nanowires is [100], with wurtzite structure. The stable crystal structure of InN is wurtzite （w-InN）, zincblende structure （z-InN） is only reported for 2D InN crystals before. However, in this work, the zincblende InN nanorods [011] are synthesized and characterized. The SEM and TEM images show that every nanorod shapes a conical tip, which can be explained by the anisotropy of growth process and the theory of Ehrlich Schwoebel barrier.

关键词： supernova explosion proto-neutron star shock wave

Effect of Rapid Thermal Annealing on the Formation of In-N Clusters in Strained InGaNAs

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Physics Letters 2010年第7期27卷 264-267页

作者：赵传阵张荣刘斌李明谢自力修向前郑有炓 jiangsu provincial key laboratory of advanced photonic and electronic materials Department of Physics Nanjing University Nanjing 210093

A model for the effect of rapid thermal annealing on the formation of In-N clusters in strained GalnNAs is developed according to thermodynamics. In the model, the lowest annealing temperature influencing the redistribution of atoms is introduced. The average variation of energy for formation per In-N bond is obtained by fitting the experimental values. Using the present model, we calculate the average number of nearest-neighbor In atoms per N atom after annealing. The obtained results are compared with the experiment. The qualitative analysis and quantitative analysis are in good agreement with each other. The model is helpful to explain the essence of the blueshift caused by annealing.

关键词： ANNEALING of crystals INDIUM arsenide THERMODYNAMICS MATHEMATICAL models CHEMICAL bonds QUANTITATIVE research QUALITATIVE research

Weak Anti-Localization and Quantum Oscillations in Topological Crystalline Insulator PbTe

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Physics Letters 2017年第2期34卷 67-70页

作者： Ke-Jie Wang Wei Wang Min-Hao Zhang Xiao-Qian Zhang Pei Yang Bo Liu Ming Gao Da-Wei Huang Jun-Ran Zhang Yu-Jie Liu Xue-Feng Wang Feng-Qiu Wang Liang He Yong-Bing Xu Rong Zhang jiangsu provincial key laboratory of advanced photonic and electronic materials Jiangsu Provincial Key Laboratory for NanotechnologyCollaborative Innovation Center of Advanced MicrostructuresSchool of Electronic Science and EngineeringNanjing UniversityNanjing 210093

Topological crystalline insulators （TCIs） have attracted worldwide interest since their theoretical predication and have created exciting opportunities for studying topological quantum physics and for exploring spintronic appli- cations. In this work, we successfully synthesize PbTe nanowires via the chemical vapor deposition method and demonstrate the existence of topological surface states by their 2D weak anti-localization effect and Shubnikov-de Haas oscillations. More importantly, the surface state contributes ~61% of the total conduction, suggesting dom- inant surface transport in PbTe nanowires at low temperatures. Our work provides an experimental groundwork for researching TCIs and is a step forward for the applications of PbTe nanowires in spintronic devices.

关键词： Weak Anti-Localization and Quantum Oscillations in Topological Crystalline Insulator PbTe length

维普期刊数据库

GaN Schottky Barrier Diodes with High-Resistivity Edge Termination Formed by Boron Implantation

在线全文

学校读者我要写书评

暂无评论

Chinese Physics Letters 2013年第5期30卷 140-143页

作者： XU Wei-Zong FU Li-Hua LU Hai REN Fang-Fang CHEN Dun-Jun ZHANG Rong ZHENG You-Dou jiangsu provincial key laboratory of advanced photonic and electronic materials School of Electronic Science and EngineeringNanjing UniversityNanjing 210093

Edge termination is one of the key technologies for fabricating high voltage Schottky barrier diodes(SBDs),which could effectively reduce the peak electric field along the Schottky contact edge and enhance the breakdown *** adopt a high-resistivity ring structure as the edge termination for planar GaN *** edge termination is formed by self-aligned boron implantation on the edge of devices to form a highly damaged *** the implant dose and energy ranges studied experimentally,the GaN SBDs show improved blocking characteristics in terms of reverse leakage current and breakdown voltage at higher implant dose or implant ***,the forward turn-on characteristics of the GaN SBDs exhibit no apparent change.

关键词： Schottky breakdown termination

High Quantum Efficiency Back-Illuminated AlGaN-Based Solar-Blind Ultraviolet p-i-n Photodetectors

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Physics Letters 2012年第9期29卷 166-169页

作者： WANG Guo-Sheng LU Hai XIE Feng CHEN Dun-Jun REN Fang-Fang ZHANG Rong ZHENG You-Dou jiangsu provincial key laboratory of advanced photonic and electronic materials and School of Electronic Science and EngineeringNanjing UniversityNanjing 210093

AlGaN-based back-illuminated solar-blind ultraviolet(UV)p–i–n photodetectors(PDs)with high quantum efficiency are fabricated on sapphire *** improve the overall performance of the PD,a series of structural design considerations and growth procedures are implemented in the epitaxy process.A distinct wavelength-selective photo-response peak of the PD is obtained in the solar-blind *** operating in photovoltaic mode,the PD exhibits a solar-blind/UV rejection ratio of up to 4 orders of magnitude and a peak responsivity of~113.5 mA/W at 270 nm,which corresponds to an external quantum efficiency of~52%.Under a reverse bias of-5 V,the PD shows a low dark current of~1.8 pA and an enhanced peak quantum efficiency of~64%.The thermal noise limited detectivity is estimated to be~3.3×10^(13) cm·Hz^(1/2)W^(-1).

关键词： AlGaN Efficiency sapphire