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Band Structure Engineering of Black Phosphorus/Graphene/MoS2 van der Waals Heterojunctions for Photovoltaic and Optoelectronic Device application

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Journal of Physics: Conference Series 2021年第2期1865卷

作者： Wenhuan Zhu Lingwei Kong Wei Long Xianglei Shi Dayong Zhou Lijie Sun Lihua Zhou Guiting Yang Xiaodong Liu Hai Liu Maolin Bo Xiaoqiang Hou Department of Micro/Nano Electronics School of Electronic Information and Electrical Engineering Shanghai Jiao Tong University Shanghai China State Grid Nanchong Power Supply Company Nanchong China State Key Laboratory of Space Power-Sources Technology Shanghai China Shanghai Institute of Space Power-Sources Shanghai China Guizhou Space Appliance Co. Ltd. Guizhou China Key Laboratory of Advanced Display and System Applications of Ministry of Education Shanghai University Shanghai China Key Laboratory of Extraordinary Bond Engineering and Advanced Materials Technology (EBEAM) of Chongqing Yangtze Normal University Chongqing China

In this paper, we study the band structure engineering of black phosphorus/graphene/MoS2 (BP/graphene/MoS2) van der Waals heterojunctions based on ab initio simulations. The density of state and charge density of BP/MoS2, bilayer-BP/MoS2, bilayer-BP/graphene/MoS2 and graphene/bilayer-BP/MoS2 heterojunctions are also investigated. It is found that the bandgaps of these four heterojunctions are smaller than the case of single layer BP or MoS2. When graphene is inserted into or stacked upon BP and MoS2 layers, the heterojunction can obtain a minimum bandgap and a higher density of state distribution. In the differential charge density diagram, electrons over the carbon, sulfur and phosphorus atoms are lost from those corresponding parts. These investigations based on the band structure engineering of 2D van der Waals heterojunctions can provide an effective guidance to manufacture the future nanoscale high performance photovoltaic and optoelectronic devices.

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The Effect of Glass Frit Paste Levelling Property on Encapsulation

The Effect of Glass Frit Paste Levelling Property on Encapsu...

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International Conference on (ICEPT) Electronic Packaging Technology

作者： Rui Tian Luqiao Yin Yi Li Jianhua Zhang Yibin Wang Key Laboratory of Advanced Display and System Applications of Ministry of Education Shanghai University Shanghai China

Laser-assisted glass frit bonding encapsulation (hereafter referred to as Laser bonding) is proposed for encapsulating air sensitive device that need a hermetic package with long-term stability. Laser bonding technology is a typical local non-contact heating technology, which allows temperature-sensitive devices to be used inside cell. With the excellent barrier performance, glass frit play an important role in encapsulation. Many factors such as the particles size, paste viscosity during process and unfairness of the surface morphology caused in screen printing process can cause the formation of defects in glass frit, weakening the barrier properties for blocking moisture and oxygen. We found that high saddle height difference comes out due to improper viscosity and improper printing process. In order to further verify the reliability of the glass laser encapsulation in the temperature output mode, the water vapor transmission rate (WVTR) of the encapsulated structure was tested using the active metal calcium electrical test method. Finally, we found that the lower saddle height difference is contributes to the smooth surface appearance. Furthermore the lower saddle height difference conducts to lower WVTR.

关键词： Glass Printing Calcium Bonding Encapsulation Surface morphology Surface treatment

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Synthesis of ZnO nanorods based on electrospinning technology

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Journal of Physics: Conference Series 2020年第3期1549卷

作者： Xiuzhen Lu Yongqian Sun Ziwei Jiang Maomao Zhang Yang Lin SMIT Center School of Mechatronic Engineering and Automation Shanghai University Shanghai 200072 China Key Laboratory of Advanced Display and System Applications Ministry of Education Shanghai University Shanghai 200072 China

A new method for fabrication of ZnO nanorods was reported. ZnO nanorods were synthesized by electrospinning technology and heat treatment with polyvinyl alcohol (PVA) and Zinc acetate as precursor. After heat treatment of ZnO electrospun nanofibers, ZnO nanorods were obtained. Morphology of ZnO nanorods was characterized by Scanning electron microscopy (SEM). Various morphologies, such as sphere, flower and plane composed of ZnO nanorods were observed. Transmission electron microscopy (TEM) images demonstrated ZnO nanorods are a single crystalline structure with a diameter of 100-180 nm. The hexagonal wurtzite structure of ZnO nanorods was determined by X-ray diffraction (XRD) pattern and Raman spectra.

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Correction: Transport mechanisms in a puckered graphene-on-lattice

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Nanoscale 2019年第14期11卷 7003页

作者： T Xu A Díaz Álvarez W Wei D Eschimese C Brillard S Eliet O Lancry E Galopin F Vaurette M Berthe D Desremes B Wei J Xu J F Lampin E Pallecchi H Happy D Vignaud B Grandidier Key Laboratory of Advanced Display and System Application Shanghai University 149 Yanchang Road Shanghai 200072 People's Republic of China.

Correction for 'Transport mechanisms in a puckered graphene-on-lattice' by T. Xu et al., Nanoscale, 2018, 10, 7519-7525.

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Real-time imaging of accelerated solid-liquid-gas reactions with nanobubbles

Research Square

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Research Square 2020年

作者： Wang, Wen Xu, Tao Chen, Jige Shangguan, Junyi Dong, Hui Ma, Huishu Zhang, Qiubo Bai, Tingting Guo, Zhirui Fang, Haiping Zheng, Haimei Sun, Litao SEU-FEI Nano-Pico Center Key Laboratory of MEMS of Ministry of Education Collaborative Innovation Center for Micro/Nano Fabrication Device and System Southeast University Nanjing210096 China Materials Sciences Division Lawrence Berkeley National Laboratory BerkeleyCA94720 United States Shanghai Synchrotron Radiation Facility Zhangjiang Laboratory Shanghai Advanced Research Institute Chinese Academy of Sciences Shanghai201204 China Department of Physics East China University of Science and Technology Shanghai200237 China Department of Materials Science and Engineering University of California BerkeleyCA94720 United States Shanghai Institute of Applied Physics Chinese Academy of Sciences Shanghai201800 China Key Laboratory of Welding Robot and Application Technology of Hunan Province Engineering Research Center of Complex Tracks Processing Technology Equipment of Ministry of Education Xiangtan University Xiangtan411105 China The Second Affiliated Hospital Key Laboratory for Aging & Disease Nanjing Medical University Nanjing210011 China

Solid-liquid-gas reactions are ubiquitous. An understanding of how gases influence the reactions at the nanoscale is significant for achieving the enhanced triple-phase reactions. Here, we report a real-time observation of the accelerated etching of gold nanorods with oxygen nanobubbles in aqueous hydrobromic acid using liquid cell transmission electron microscopy (TEM). Our observation reveals that when an oxygen nanobubble is close to a nanorod below the critical distance (~1nm), the local etching rate is significantly enhanced with over an order of magnitude faster. Molecular dynamics simulations results show that the strong attractive van der Waals interaction between the gold nanorod and oxygen molecules facilitates the transport of oxygen through the thin liquid layer to the gold surface and thus plays a crucial role in increasing the etching rate. This result sheds light on the rational design of solid-liquid-gas reactions for enhanced activities. © 2020, CC BY.

关键词： Molecular dynamics

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Correction to: A method of VR‑EEG scene cognitive rehabilitation training

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Health information science and systems 2021年第1期9卷 7页

作者： Wenjun Tan Yang Xu Pan Liu Chunyan Liu Yujin Li Yanrui Du Chao Chen Yuping Wang Yanchun Zhang Key Laboratory of Intelligent Computing in Medical Image Ministry of Education Northeastern University Shenyang 110189 China. Cyberspace Institute of Advanced Technology Guangzhou University Guangzhou 510006 China. Department of Neurology Xuanwu Hospital Capital Medical University Beijing 100053 China. Key Laboratory of Complex System Control Theory and Application Tianjin University of Technology Tianjin 300384 China. Institute for Sustainable Industries and Liveable Cities Victoria University Melbourne VIC 8001 Australia.

[This corrects the article DOI: 10.1007/s13755-020-00132-6.].

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Hopf bifurcation analysis and control of a bacteria-immunity system with delayed quorum sensing 8

Hopf bifurcation analysis and control of a bacteria-immunity...

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8th International Symposium on Computational Intelligence and Industrial applications and 12th China-Japan International Workshop on Information Technology and Control applications, ISCIIA and ITCA 2018

作者： Liu, Feng Dai, Xiangjuan Mei, Qicheng Ling, Guang Sun, Fenglan School of Automation China University of Geosciences Wuhan430074 China Hubei key Laboratory of Advanced Control and Intelligence Automation for Complex System Wuhan430074 China School of Science Wuhan University of Technology Wuhan430070 China Research Center of System Theory and Application Chongqing University of Posts and Telecommunications Chongqing400065 China

A bacteria-immunity system model is formulated to describe the interaction between bacteria and immune cells with quorum sensing. Time delay is introduced to study this system. The stability and the conditions for the existence of Hopf bifurcation are obtained. Finally, numerical simulations are used to verify the theoretical conclusions. © ISCIIA and ITCA 2018 - 8th International Symposium on Computational Intelligence and Industrial applications and 12th China-Japan International Workshop on Information Technology and Control application.

关键词： Bacteria

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Sampled-data Observer Design for a Class of Stochastic Nonlinear systems Based on the Approximate Discrete-time Models

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IEEE/CAA Journal of Automatica Sinica 2017年第3期4卷 507-511页

作者： Xinxin Fu Yu Kang Pengfei Li Department of Automation University of Science and Technology of China State Key Laboratory of Fire Science Department of AutomationInstitute of Advanced TechnologyUniversity of Science and Technology of China Key Laboratory of Technology in GeoSpatial Information Processing and Application System Chinese Academy of Sciences IEEE

In this paper,we studied the approximate sampleddata observer design for a class of stochastic nonlinear ***-Maruyama approximation was investigated in this paper because it is the basis of other higher precision numerical methods,and it preserves important structures of the nonlinear ***,the form of Euler-Maruyama model is simple and easy to be *** results provide a reference for sampled-data observer design method for such stochastic nonlinear systems,and may be useful to many practical control applications,such as tracking control in mechanical *** the effectiveness of the approach is demonstrated by a simulation example.

关键词： Approximation model exponentially bounded sampled-data observer stochastic nonlinear

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View-specific based error concealment scheme for multi-view plus depth video 13th

View-specific based error concealment scheme for multi-view ...

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13th International Forum of Digital TV and Wireless Multimedia Communication, IFTC 2016

作者： Ma, Ran Hu, Xiangyu Liu, Deyang Hou, Yu An, Ping School of Communication and Information Engineering Shanghai University Shanghai200072 China Key Laboratory of Advanced Display and System Application Ministry of Education Shanghai200072 China

ISBN: (纸本)9789811042102

Multi-view video plus depth (MVD) is an efficient format of 3D video. MVD video can be encoded by either H.264/AVC or HEVC standard to gain higher compression ratio, which benefits their broadcasting over the Internet. However, the encoded and transferred MVD video tends to develop worse visual quality degradation caused by lossy network channel. Therefore, error concealment is here to help refrain this problem. In this paper, we propose a classification-related error concealment method for MVD video. Within our method, motion-based classification is used to judge whether the corrupted blocks are static or not. If so, the blocks from reference frames are adopted to conceal the corrupted blocks. Otherwise, view-specific based concealment procedures, which are designed in accordance with view features, are used to conceal the corrupted blocks in different views. Experimental results on AVC-based Test Model (ATM) show the superiority of this concealment scheme to several other error concealment methods in PSNR along with acceptable execution time increase. © Springer Nature Singapore Pte Ltd. 2017.

关键词： Errors

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Laser bonding of glass and glass with constant temperature output

Laser bonding of glass and glass with constant temperature o...

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第十九届国际电子封装技术会议(ICEPT 2018)

作者： Xianliang Fu Rui Tian Jianhua Zhang Xifeng Li Luqiao Yin Yi Li School of Mechatronics and Automation Shanghai University Shanghai China Key Laboratory of Advanced Display and System Applications of Ministry of Education Shanghai Univers

The glass and glass laser bonding technology is a laser cladding technology with glass frit as adhesive *** to the thermal expansion coefficient of glass and other factors,the bonding process window is *** uniform temperature field is required for glass laser *** traditional encapsulation used constant power laser is easy to lead to the unevenness of temperature field distribution and affect the quality of *** on bismuth salts glass slurry,the encapsulation method combining low temperature laser scanning and high temperature laser scanning is proposed under the constant temperature *** the glass encapsulation effect under different output temperature of the laser technology,the process of laser bonding is *** sample with no crack on the surface of the laser bonding has *** the same time,the water vapor transmission rate(WVTR)of encapsulation structure is 2.0875 × 10-5 g/m2·day with the electrical Ca test.

关键词： laser temperature glass and glass laser bonding water vapor transmission rate (WVTR)

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