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2017 Symposium on Piezoelectricity, Acoustic Waves, and Device Applications, SPAWDA 2017

作者： Pan, Cheng-Liang Zhang, Jing Xia, Hao-Jie Yu, Lian-Dong School of Instrument Science and Opto-electronics Engineering Hefei University of Technology Hefei230009 China Key Laboratory of Micro Opto-electro Mechanical System Technology Tianjin University Tianjin300072 China

ISBN: (纸本)9781538662373

Energy utilization and environment protection are universal hot topics in our society. Harvesting ambient clean energy sources to supply low power devices has shown a wide application potential. In this paper, a kind of right-angle piezoelectric cantilever beam is proposed to harvesting wind energy as a power supplier for remote wireless sensor network nodes. Structure design and working principle of the device are introduced. Performances of the device are investigated numerically and experimentally, which are compared with the traditional cantilever beam. The strain distributions and natural frequencies of the structures are analyzed with FEA simulations. With the same natural frequency and piezoelectric element, output capacities of the prototypes were tested under different wind speeds. With an optimal load of about 500 kΩ, the maximum output power of the right-angle cantilever beam is over 1.3mW under the wind speed of 6 m/s, which is about twice as much as the traditional cantilever beam. © 2017 IEEE.

关键词： Cantilever beams

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Valley filtering effect of phonons in graphene with a grain boundary

arXiv

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arXiv 2019年

作者： Chen, Xiaobin Xu, Yong Wang, Jian Guo, Hong State Key Laboratory on Tunable laser Technology Ministry of Industry Information Technology Key Lab of Micro-Nano Optoelectronic Information System School of Science Harbin Institute of Technology Shenzhen518055 China Department of Physics Center of Theoretical and Computational Physics University of Hong Kong Hong Kong Hong Kong Collaborative Innovation Center of Quantum Matter State Key Laboratory of Low Dimensional Quantum Physics Department of Physics Tsinghua University Beijing100084 China University of Hong Kong Shenzhen Institute of Research and Innovation Shenzhen518053 China College of Physics and Energy Shenzhen University Shenzhen518060 China Department of Physics 3600 University McGill University MontrealQCH3A 2T8 Canada

Due to their possibility to encode information and realize low-energy-consumption quantum devices, control and manipulation of the valley degree of freedom have been widely studied in electronic systems. In contrast, the phononic counterpart–valley phononics–has been largely unexplored, despite the importance in both fundamental science and practical applications. In this work, we demonstrate that the control of "valleys" is also applicable for phonons in graphene by using a grain boundary. In particular, perfect valley filtering effect is observed at certain energy windows for flexural modes and found to be closely related to the anisotropy of phonon valley pockets. Moreover, valley filtering may be further improved using Fano-like resonance. Our findings reveal the possibility of valley phononics, paving the road towards purposeful phonon engineering and future valley phononics. Copyright © 2019, The Authors. All rights reserved.

关键词： Landforms

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Thick SU8 microstructures prepared by broadband UV lithography and the applications in MEMS devices

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Optoelectronics Letters 2016年第3期12卷 182-187页

作者：李东玲温志渝尚正国佘引 National Key Laboratory of Fundamental Science of Novel Micro/Nano Device and System Technology Key Laboratory of Optoelectronic Technology and System of the Education Ministry of China Micro System Reaserch CenterChongqing University

Thick SU8 microstructures with high aspect ratio and good side wall quality were fabricated by ultraviolet （UV） lithography, and the processing parameters were comprehensively studied. It proves that the adhesion of SU8 on silicon （Si） substrates is influenced by Si-OH on the surface, and can be improved by the HF treatment. Cracks and de- lamination are caused by large internal stress during fabrication process, and are significantly influenced by soft bake and post-exposure bake processes. The internal stress is reduced by a low post-exposure bake exposure tem- perature of 85 ℃ for 40 rain. A three-step soft bake enhances the reflowing ofSU8 photoresist, and results in uni- form surface and less air bubbles. The vertical side wall is obtained with the optimized exposure dose of 800 mJ/cm2 for the thickness of 160 μm. Using the optimized fabrication process combined with a proper structure design, dense SU8 micro pillars are achieved with the aspect ratio of 10 and the taper angle of 89.86°. Finally, some possible ap- plications of SU8 in micro-electromechanical system （MEMS） device are developed and demonstrated.

关键词： MEMS器件紫外光刻微结构应用微机电系统烘烤过程编写宽带

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Unified Rendering Array Driver Runtime Optimization for Graphic Application

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IOP Conference Series: Earth and Environmental science 2019年第1期234卷

作者： Chengcheng Ma Ze Tian Honghong Liu Zhao Nie China Aeronautical Computing Research Institute Aviation key Laboratory of Science and Technology on integrated Circuit and Micro-System Design P.O. Box 710068 China Xiangteng microelectronics technology co. LTD P.O. Box 710068 China

As the core of GPU processing, the performance of Unified rendering array is directly affected by the shader driver. On the basis of research the structure of Unified rendering array processing, this paper proposes a runtime Unified rendering array driver optimization method for graphical application, can according to different graphics application scenario runtime to generate optimized Unified rendering array driver, testing on graphics processors FPGA verification environment, driven by the runtime optimization compared with the traditional full function driver, performance increased by 55% - 270%.

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High Performance Nitrogen Dioxide Sensors with Sulfur Doped Graphene And micro-Hotplatform

High Performance Nitrogen Dioxide Sensors with Sulfur Doped ...

引用

IEEE Sensors Conference

作者： Lianfeng Guo Yuelin Wang Tie Li Science and Technology on Micro-system Laboratory Shanghai Institute of Microsystem and Information Technology Chinese Academy of Sciences

ISBN: (纸本)9781509010134

Nitrogen dioxide sensors with ppb level sensitivity and fast response and recovery were developed by integrating sulfur doped graphene with micro-hotplatform. Sulfur was doped in graphene after its transfer onto the micro-hotplatform through chemical vapor deposition at 500℃. The sensors were sensitive to 5 ppb nitrogen dioxide at room temperature. With the help of heater integrated in MHP, the sulfur doped graphene sensors could quickly recover to the baseline within 5 min. The sensors described here were very promising for practical applications.

关键词： Sulfur-doped graphene Nitrogen dioxide sensor Ultra-sensitive micro-hotplatform ultrasensitive graphene Nitrogen Dioxide Sensors Sulfur FAST-RESPONSE Heaters Chemical vapor deposition

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Noble Metal Dichalcogenides: A Noble Metal Dichalcogenide for High‐Performance Field‐Effect Transistors and Broadband Photodetectors (Adv. Funct. Mater. 5/2020)

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Advanced Functional Materials 2020年第5期30卷

作者： Zhen Wang Peng Wang Fang Wang Jiafu Ye Ting He Feng Wu Meng Peng Peisong Wu Yunfeng Chen Fang Zhong Runzhang Xie Zhuangzhuang Cui Liang Shen Qinghua Zhang Lin Gu Man Luo Yang Wang Huawei Chen Peng Zhou Anlian Pan Xiaohao Zhou Lili Zhang Weida Hu State Key Laboratory of Infrared Physics Shanghai Institute of Technical Physics Chinese Academy of Sciences Shanghai 200083 China University of Chinese Academy of Sciences Beijing 100049 China Hangzhou Institute for Advanced Study University of Chinese Academy of Sciences Hangzhou 310024 China State Key Laboratory of Integrated Optoelectronics College of Electronic Science and Engineering Jilin University Changchun 130012 China Beijing National Laboratory for Condensed Matter Physics Institute of Physics Chinese Academy of Sciences Beijing 100190 China Jiangsu Key Laboratory of ASIC Design Nantong University Nantong Jiangsu 226019 China State Key Laboratory of ASIC and System Department of Microelectronics Fudan University Shanghai 200433 China Key Laboratory for Micro‐Nano Physics and Technology of Hunan Province College of Materials Science and Engineering Hunan University Changsha 410082 China

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Correction: Photoluminescence tuning in carbon dots: surface passivation or/and functionalization, heteroatom doping

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Journal of Materials Chemistry C 2019年第10期7卷 3105-3105页

作者： Linbo Li Tao Dong Institute of Applied Micro-Nano Science and Technology – IAMNST Chongqing Key Laboratory of Colleges and Universities on Micro-Nano Systems Technology and Smart Transducing Chongqing Engineering Laboratory for Detection Control and Integrated System National Research Base of Intelligent Manufacturing Service Chongqing Technology and Business University Nan'an District 400067 Chongqing China Institute for Microsystems – IMS Faculty of Technology Natural Sciences and Maritime Sciences University of South-Eastern Norway Postboks 235 3603 Kongsberg Norway

Correction for ‘Photoluminescence tuning in carbon dots: surface passivation or/and functionalization, heteroatom doping’ by Linbo Li et al., J. Mater. Chem. C, 2018, 6, 7944–7970.

Correction for ‘Photoluminescence tuning in carbon dots: surface passivation or/and functionalization, heteroatom doping’ by Linbo Li et al., J. Mater. Chem. C, 2018, 6, 7944–7970.

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Phase-encoded RF signal generation based on an integrated 49GHz micro-comb optical source

arXiv

引用

arXiv 2019年

作者： Xu, Xingyuan Tan, Mengxi Wu, Jiayang Boes, Andreas Corcoran, Bill Nguyen, Thach G. Chu, Sai T. Little, Brent E. Morandotti, Roberto Mitchell, Arnan Moss, David J. Centre for Micro-Photonics Swinburne University of Technology HawthornVIC3122 Australia School of Engineering RMIT University MelbourneVIC3001 Australia Department of Electrical and Computer System Engineering Monash University ClaytonVIC3168 Australia Department of Physics City University of Hong Kong Tat Chee Avenue Hong Kong State Key Laboratory of Transient Optics and Photonics Xi'an Institute of Optics and Precision Mechanics Chinese Academy of Science Xi'An China INSR-Énergie Matériaux et Télécommunications 1650 Boulevard Lionel-Boulet VarennesQCJ3X 1S2 Canada Institute of Fundamental and Frontier Sciences University of Electronic Science and Technology of China Chengdu610054 China

We demonstrate photonic RF phase encoding based on an integrated micro-comb source. By assembling single-cycle Gaussian pulse replicas using a transversal filtering structure, phase encoded waveforms can be generated by programming the weights of the wavelength channels. This approach eliminates the need for RF signal generators for RF carrier generation or arbitrary waveform generators for phase encoded signal generation. A large number of wavelengths—up to 60—were provided by the microcomb source, yielding a high pulse compression ratio of 30. Reconfigurable phase encoding rates ranging from 2 to 6 Gb/s were achieved by adjusting the length of each phase code. This work demonstrates the significant potentials of this microcomb-based approach to achieve high-speed RF photonic phase encoding with low cost and footprint. Copyright © 2019, The Authors. All rights reserved.

关键词： Signal encoding

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Photonic based phase-encoded RF signal generation for advanced radar systems with a 49GHz soliton crystal micro-comb optical source

TechRxiv

引用

TechRxiv 2019年

作者： Xu, Xingyuan Tan, Mengxi Wu, Jiayang Boes, Andreas Corcoran, Bill Nguyen, Thach G. Chu, Sai T. Little, Brent E. Morandotti, Roberto Mitchell, Arnan Moss, David J. The Centre for Micro-Photonics Swinburne University of Technology HawthornVIC3122 Australia The School of Engineering RMIT University MelbourneVIC3001 Australia The Department of Electrical and Computer System Engineering Monash University ClaytonVIC3168 Australia The Department of Physics City University of Hong Kong Tat Chee Avenue Hong Kong State Key Laboratory of Transient Optics and Photonics Xi'an Institute of Optics and Precision Mechanics Chinese Academy of Science Xi'An China INSR-Énergie Matériaux et Télécommunications 1650 Boulevard Lionel-Boulet VarennesQCJ3X 1S2 Canada The Institute of Fundamental and Frontier Sciences University of Electronic Science and Technology of China Chengdu610054 China

关键词： Signal encoding

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MM-PBSA: Challenges and opportunities 10

MM-PBSA: Challenges and opportunities

引用

10th International Congress on Image and Signal Processing, BioMedical Engineering and Informatics, CISP-BMEI 2017

作者： Do Vale Hipolito Cavalheiro, Joao Pedro Pires, Nuno Miguel Matos Dong, Tao Institute of Applied Micro-Nano Science and Technology-IAMNST Chongqing Key Laboratory of Colleges Universities On Micro-Nano Systems Technology and Smart Transducing Chongqing Engineering Laboratory for Detection Control and Integrated System National Research Base of Intelligent Manufacturing Service Chongqing Technology and Business University Chongqing China Department of Microsystems-IMS Faculty of Technology Natural Sciences and Maritime Sciences University College of Southeast Norway Kongsberg Norway P.O. Box 5003 ÅsN-1432 Norway

ISBN: (纸本)9781538619377

Molecular Mechanics Poisson-Boltzmann Surface Area (MM-PBSA) is arguably the most popular method for free binding energy prediction since it is considerably more accurate than docking or scoring methods, but considerably less demanding than Free Energy Perturbation (FEP). In this review, the most important challenges and opportunities associated to this method were addressed and evaluated. The following conclusions were obtained: Accuracy of MM-PBSA calculations still strongly depends on the settings used for the prediction, the conditions in which Molecular Dynamics simulations (MD) are made, the conditions from which the experimental data are obtained, it depends on the presence of the complex structure and this method has also shown to be unable to provide accurate results for charged molecules. On the other hand, it presents many opportunities since many improvements were based on MM-PBSA calculations such as Single Amino Acid Mutation based change in Binding free Energy (SAAMBE), bootstrap, dampened Molecular Mechanics Poisson-Boltzmann Surface Area (dMM-PBSA), a high throughput method called g-mmpbsa, a method based on both MM-PBSA calculations and a scoring function, force fields for inhomogeneous protein specific environments and many other new ways of improving the accuracy of this promising method. This study intends to clarify what are the major trends in this field and thus contribute to increase MM-PBSA's applicability and efficiency. © 2017 IEEE.

关键词： Molecular dynamics

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