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3rd International Conference on New materials, Machinery, and Vehicle Engineering, NMMVE 2024

作者： Li, Jiazhu Zhang, Shiwang Qin, Shaohui Yuan, Jiawei Li, Zixuan Yuan, Zheng Zhao, Zilong Luo, Ruiyan Tan, Hongqiang Zhao, Yihe Lif, Jie Gao, Wendi Li, Zhikang Zhao, Libo State Key Laboratory for Manufacturing Systems Engineering International Joint Laboratory for Micro/Nano Manufacturing and Measurement Technologies Xi'an710049 China Research Institute for Intelligent Sensing Technology and System Xi'an710049 China School of Instrument Science and Technology Xi'an Jiaotong University Xi'an710049 China School of Mechanical Engineering Xi'an Jiaotong University Xi'an710049 China Shandong Laboratory of Yantai Advanced Materials and Green Manufacturing Yantai265503 China College of Mechanical and Electrical Engineering Shaanxi University of Science and Technology Xi'an710021 China

ISBN: (纸本)9781510686267

Due to compact size, high consistency, and resistance to radio frequency interference, MEMS microphones are increasingly important in the consumer electronics market and have driven the development of intelligent applications. There is a growing demand for enhanced performance in MEMS microphones. Currently, research on the shell design of MEMS microphones is relatively shallow, often only considering the accommodation of the vibrating diaphragm and ASIC chip, as well as the minimization of volume, without focusing on the impact of the shell configuration on the microphone's acoustic performance. Therefore, this paper starts from the perspective of optimizing acoustic response and studies the impact of the packaging shell configuration and design parameters of MEMS microphones on the microphone's sensitivity and frequency response, including the sound collection hole diameter, chamber volume, and chip layout. The goal is to establish a quantitative relationship between these key parameters and the microphone's performance. Simulation software was used to simulate the acoustic characteristics of the microphone shell, and optimal design parameters were recommended based on the simulation results. In addition, the research also proposes methods to adjust the frequency response of the microphone within the target frequency range, providing a reference direction for the scientific design of the shell structure to reduce the transmission loss of acoustic energy and enhance response sensitivity. © 2024 SPIE.

关键词： Shells (structures)

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Intelligent Wireless Self-Sustained Sensing Cubic Node Toward AIOT Ready Smart City

Intelligent Wireless Self-Sustained Sensing Cubic Node Towar...

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micro and nanotechnology for Power Generation and Energy Conversion Applications (PowerMEMS)

作者： Manjuan Huang Tingting Zhao Guoqing Jin Xiaojing Mu Huicong Liu Jiangsu Provincial Key Laboratory of Advanced Robotics School of Mechanical and Electrical Engineering Soochow University Suzhou CHINA Key Laboratory of Optoelectronic Technology & Systems Ministry of Education International R&D Center of Micro-nano Systems and New Materials Technology Chongqing University Chongqing CHINA

This paper presents an intelligent wireless self-sustained sensing cubic node, consisting of a rotational electromagnetic generator (R-EMG) for power supply and a versatile triaxial piezoelectric sensor (TPS) composed of three piezoelectric beams. This system enhances internet of things (IoT) sensing through cloud-based artificial intelligence (AI) computing. The cubic node provides power generation and multi-functional sensing capabilities, including vibration acceleration, frequency, and tilting angle. The design of the R-EMG ensures stable output at different rotational speeds, reaching a maximum output power of 66 mW at 550 rpm with an external load of 1.1 kΩ, allowing for self-sustaining energy generation for the node. Additionally, the cubic design enables the orthogonal placement of the three piezoelectric beams, enabling a broad response to vibrational energy from various directions. This flexibility allows for diverse applications across different frequencies and scenarios.

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Effects on the emission discrepancy between two-dimensional Sn-based and Pb-based perovskites

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Chinese Optics Letters 2022年第2期20卷 118-124页

作者： Tianju Zhang Chaocheng Zhou Jia Lin Jun Wang Laboratory of Micro-Nano Optoelectronic Materials and Devices Shanghai Institute of Optics and Fine MechanicsChinese Academy of SciencesShanghai 201800China Center of Materials Science and Optoelectronic Engineering University of Chinese Academy of SciencesBeijing 100049China Department of Physics Shanghai Key Laboratory of Materials Protection and Advanced Materials in Electric PowerShanghai University of Electric PowerShanghai 200090China State Key Laboratory of Advanced Optical Communication Systems and Networks School of Physics and AstronomyShanghai Jiao Tong UniversityShanghai 200240China CAS Center for Excellence in Ultra-Intense Laser Science Shanghai 201800China

Two-dimensional (2D) Sn-based perovskites are a kind of non-toxic environment-friendly emission material with low photoluminescence quantum yields (PLQYs) and enhanced emission linewidths compared to that of 2D Pb-based ***,there is no work systematically elucidating the reasons for the differences in the emission *** fabricate (BA)_(2)SnI_(4)and (BA)_(2)PbI_(4)having different defect densities and different exciton-phonon scattering *** also reveal that 2D Sn-based perovskites have stronger exciton-phonon scattering intensity and higher defects density,significantly broadening the emission linewidth and accelerating the exciton relaxation process,which significantly reduces the PLQY of 2D Sn-based perovskites.

关键词： temperature-dependent photoluminescence spectra transient absorption spectra defect state exciton-phonon scattering two-dimensional perovskites

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Bifunctional Lithium-Montmorillonite Enabling Solid Electrolyte with Superhigh Ionic Conductivity for High-Performanced Lithium Metal Batteries

SSRN

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SSRN 2023年

作者： Wang, Lu Yi, Shangzhao Liu, Qianqian Li, Yabing Hu, Yuzhen Tu, Haifeng Wang, Yuchen Sun, Ao Zhu, Fengyi Mushtaq, Farwa Liu, Bo Xue, Pan Li, Wanfei Liu, Meinan Division of Nanomaterials Jiangxi Key Lab of Carbonene Materials Jiangxi Insitute of Nanotechnology Nanchang330200 China Guangdong Institute of Semicond uctor Micro-nano manufacturing technology Foshan528225 China Suzhou Key Laboratory for Nanophotonic and Nanoelectronic Materials and Its Devices School of Materials Science and Engineering Suzhou University of Science and Technology Jiangsu Suzhou215009 China Key Laboratory of Multifunctional Nanomaterials and Smart Systems Advanced Materials Division Suzhou Institute of Nano-Tech and Nano-Bionics Chinese Academy of Sciences Jiangsu Suzhou215123 China School of Chemistry and Chemical Engineering Yangzhou University Yangzhou225002 China

Solid-state lithium-metal batteries (SSLMBs) have been regarded as one of the most promising battery systems due to their high energy density and excellent safety. However, the low ionic conductivity of solid electrol... 详细信息

关键词： Solid electrolytes

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Reversely tailoring antiresonant hollow-core fibers with elliptical-shaped tubes for enhanced in-line bandpass filters

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Optics Express 2025年第12期33卷 26641-26650页

作者： Jie Zhu Yu Qin Cong Xiong Wei Ji Caoyuan Wang Jonas H Osório Wei Jiang Yichun Shen Limin Xiao Advanced Fiber Devices and Systems Group Key Laboratory of Micro and Nano Photonic Structures (MoE) Key Laboratory for Information Science of Electromagnetic Waves (MoE) Shanghai Engineering Research Center of Ultra-Precision Optical Manufacturing School of Information Science and Technology Fudan University Shanghai 200433 China Zhongtian Technology Advanced Materials Co. Ltd. Nantong Jiangsu 226009 China Multiuser Laboratory of Optics and Photonics (LaMOF) Department of Physics Federal University of Lavras Lavras 37203-202 Brazil Heraeus (China) Investment Co. Ltd. Shanghai China

We report a simple and effective approach to reversely tailoring the tubes of an antiresonant hollow-core fiber (AR-HCF). The AR-HCFs with elliptical-shaped shrinkage tubes, implemented by a traditional flame brushing technique, were characterized for what we believe to be the first time. We have thus achieved a 70 nm wide bandpass filter with a minimum extra loss below 0.1 dB and the out-of-band suppression up to 28 dB in the 800 nm wide spectral range via the combination of down-tapering and reverse-tapering of AR-HCFs. The elliptical-shaped tubes can reduce the deformation-induced confinement loss when tailoring the thickness of HCF. The ability to tailor the shape and thickness of tubes of AR-HCF in a submicron-scale using a traditional flame taper rig will benefit the fabrication of in-fiber HCF devices such as the low-loss HCF bandpass filter with high out-of-band suppression.

关键词： Acoustooptic modulators Bandpass filters Fiber tapers Fresnel reflection Optical fibers Polarizers

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Dual Li+ Transport Enabled by Bn-Assisted Solid-Polymer-Electrolyte for High-Performance Lithium Batteries

SSRN

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SSRN 2023年

作者： Wang, Yuchen Tu, Haifeng Sun, Ao Wang, Lu Zhu, Fengyi Xue, Pan Wang, Jian Liu, Meinan Key Laboratory of Multifunctional Nanomaterials and Smart Systems Advanced Materials Division Suzhou Institute of Nano-Tech and Nano-Bionics Chinese Academy of Sciences Jiangsu Suzhou215123 China Nano Science and Technology Institute University of Science and Technology of China Anhui Hefei230026 China School of Chemistry and Chemical Engineering Yangzhou University Yangzhou225002 China Division of Nanomaterials Jiangxi Key Lab of Carbonene Materials Jiangxi Insitute of Nanotechnology Nanchang330200 China Guangdong Institute of Semiconductor Micro-nano manufacturing technology Foshan528225 China Ulm89081 Germany

Solid-state lithium batteries are expected to revolutionize the future wearable electronics due to their enhanced safety and high energy density;however, the sluggish Li+ kinetics of solid-state electrolyte seriously hampered their practical applications. Herein, we design a solid-polymer-electrolyte (SPE) with the assistance of BN, which exhibits impressive electrochemical properties, i.e., a high ionic conductivity of 0.37 mS cm-1 at 25 °C, a superior Li+ transference number of 0.63, and wide voltage window of 4.8 V. Density functional theory calculations and Raman spectra results reveal that BN not only changes the interaction between Li+ and -CF groups, which enables Li+ hopping easily along polymer segments, but also modifies the Li+ solvation environment from polymer units to aggregated ion pairs, which further accelerates the diffusion rate of Li+. Benefited from these merits, BN-assisted SPE presents superior performance at room temperature: i.e., Li/Li symmetric batteries maintain uniform polarization for more than 600 h at a current density of 0.2 mA cm-2;LiFePO4/Li battery delivers an excellent long cycle stability with a high coulombic efficiency (CE) of 99.7% at 0.5C after 200 cycles;the high-voltage LiNi0.5Co0.2Mn0.3O2/Li system also achieves a superior CE of 99.7%, and what’s more, this system also delivers a high-capacity retention of 90% over 100 cycles, indicating the outstanding antioxidation capability of this BN-assisted SPE. In addition, a bipolar LiFePO4/Li pouch cell with a high-voltage output of 6.41V was achieved and it demonstrates impressive safety during the abuse cutting, well suggesting its great potential in future applications. © 2023, The Authors. All rights reserved.

关键词： Lithium compounds

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Highly efficient nonuniform finite difference method for three-dimensional electrically stimulated liquid crystal photonic devices

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Photonics Research 2024年第4期12卷 865-875页

作者： ZHENGHAO GUO MENGJUN LIU ZIJIA CHEN RUIZHI YANG PEIYUN LI HAIXIA DA DONG YUAN GUOFU ZHOU LINGLING SHUI HUAPENG YE Guangdong Provincial Key Laboratory of Optical Information Materials and Technology&Institute of Electronic Paper Displays South China Academy of Advanced OptoelectronicsSouth China Normal UniversityGuangzhou 510006China SCNU-TUE Joint Lab of Device Integrated Responsive Materials(DIRM) National Center for International Research on Green OptoelectronicsSouth China Normal UniversityGuangzhou 510006China Guangdong Provincial Key Laboratory of Nanophotonic Functional Materials and Devices School of Information and Optoelectronic Science and EngineeringSouth China Normal UniversityGuangzhou 510006China Joint Laboratory of Optofluidic Technology and Systems National Center for International Research on Green OptoelectronicsSouth China Academy of Advanced OptoelectronicsSouth China Normal UniversityGuangzhou 510006China College of Electronic and Optical Engineering&College of Microelectronics Nanjing University of Posts and TelecommunicationsNanjing 210046China Key Laboratory of Radio Frequency and Micro-Nano Electronics of Jiangsu Province Nanjing 210023China

Liquid crystal(LC)photonic devices have attracted intensive attention in recent decades,due to the merits of tunability,cost-effectiveness,and high ***,the precise and efficient simulation of large-scale three-dimensional electrically stimulated LC photonic devices remains challenging and resource *** we report a straightforward nonuniform finite difference method(NFDM)for efficiently simulating largescale LC photonic devices by employing a spatially nonuniform mesh grid.

关键词： nonuniform crystal finite

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Berlin Green Framework‑Based Gas Sensor for Room‑Temperature and High‑Selectivity Detection of Ammonia

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nano-micro Letters 2021年第4期13卷 146-158页

作者： Tingqiang Yang Lingfeng Gao Wenxuan Wang Jianlong Kang Guanghui Zhao Delong Li Wen Chen Han Zhang Institute of Microscale Optoelectronics Collaborative Innovation Centre for Optoelectronic Science and TechnologyKey Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong ProvinceCollege of Physics and Optoelectronic EngineeringShenzhen Key Laboratory of Micro‑Nano Photonic Information TechnologyGuangdong Laboratory of Artificial Intelligence and Digital Economy(SZ)Shenzhen UniversityShenzhen 518060People’s Republic of China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing School of Materials Science and EngineeringWuhan University of TechnologyWuhan 430070People’s Republic of China Research Center for Materials Genome Engineering Wuhan University of TechnologyWuhan 430070People’s Republic of China

Ammonia detection possesses great potential in atmosphere environmental protection,agriculture,industry,and rapid medical ***,it still remains a great challenge to balance the sensitivity,selectivity,working temperature,and response/recovery *** this work,Berlin green(BG)framework is demonstrated as a highly promising sensing material for ammonia detection by both density functional theory simulation and experimental gas sensing *** in BG framework offers abundant active sites for ammonia absorption,and the absorbed ammonia transfers sufficient electron to BG,arousing remarkable enhancement of *** BG framework shows remarkable response to ammonia at 50–110°C with the highest response at 80°C,which is jointly influenced by ammonia’s absorption onto BG surface and insertion into BG *** sensing performance of BG can hardly be achieved at room temperature due to its high *** of conductive Ti3CN MXene overcomes the high resistance of pure BG framework,and the simply prepared BG/Ti3CN mixture shows high selectivity to ammonia at room temperature with satisfying response/recovery speed.

关键词： Berlin green framework Gas sensor Ammonia Room temperature High selectivity

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Chemically Bonded Flexible Pressure Sensor Based on Divergent Metallic Grid with High Linearity, Low Hysteresis, and Excellent Stability

SSRN

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SSRN 2024年

作者： Luo, Guoxi Zhang, Bingcheng Xu, Yu Pi, Diying Li, Min Yang, Ping Zhao, Libo Shandong Laboratory of Advanced Materials and Green Manufacturing at Yantai Yantai265503 China School of Instrument Science and Technology Xi'an Jiaotong University Xi’an710049 China School of Mechanical Engineering Xi'an Jiaotong University Xi’an710049 China Revopoint 3D Technologies Inc Xi’an710199 China Chongqing Key Laboratory of Micro-Nano Systems and Intelligent Sensing Chongqing Academician Workstation Chongqing 2011 Collaborative Innovation Center of Micro/Nano Sensing and Intelligent Ecological Internet of Things Chongqing Technology and Business University Chongqing400067 China

As intelligent robots and smart wearable electronics become commonplace, the demand for flexible pressure sensors is increasing rapidly. Despite the enormous effort in the development of flexible pressure sensor with high sensitivity, limited progress has been made in terms of developing a flexible pressure sensor with high linearity, low hysteresis, and high stability to avoid additional signal processing and signal distortion, and meanwhile promise good accuracy. Herein, we developed a flexible pressure sensor on foundation of the metallic strain effect. The divergent metallic grid was manufactured on polymide (PI) film with the mature magnetron sputtering and lift-off method, and a novel chemical bonding between PI and outer covering polydimethylsiloxane (PDMS) was developed for a flexible encapsulation. Benefiting from the excellent intrinsic properties of rigid sensitive materials and high-strength bonding. The as-fabricated pressure sensors exhibited several superior properties that are characterized by high linearity (linear regression coefficient of R2 = 0.991) in whole sensing range, low hysteresis (2.78%), rapid response/relaxation time (ca. 29/21 ms), remarkable durability (over 13,000 bending and stretching cycles), and excellent stability. The integrated merits of this novel pressure sensor were demonstrated in applications including human physiological signal monitoring, material identification, and pressure space mapping. © 2024, The Authors. All rights reserved.

关键词： Pressure sensors

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Ultrafast polarization modulation with high-purity chiral quasi-BIC metasurfaces

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Chinese Optics Letters 2025年第5期 142-148页

作者：赖方兴范宇斌沙新博邓画春蒋雄肖淑敏黄灿宋清海 Ministry of Industry and Information Technology Key Lab of Micro-Nano Optoelectronic Information System Guangdong Provincial Key Laboratory of Semiconductor Optoelectronic Materials and Intelligent Photonic Systems Harbin Institute of Technology (Shenzhen) Department of Electrical Engineering City University of Hong Kong Heilongjiang Provincial Key Laboratory of Advanced Quantum Functional Materials and Sensor Devices

Precise control of the polarization state of light on ultrafast time scales plays a key role in revealing the inherent chiral or anisotropic optical responses in various material systems, and it is crucial for applications that require complex polarization encoding. Here, we explore ultrafast polarization control enabled by silicon-based chiral bound state in the continuum（BIC）metasurfaces. By utilizing the intrinsic chiral mode, we achieve high-purity chiral reflection light（S3～-0.92） and rapid modulation（～0.4 ps） of polarization states through all-optical methods. Unlike traditional polarization modulation techniques, our approach leverages the unique advantages of slanted etching dielectric chiral BIC metasurfaces, which facilitate high-Q resonance and exhibit narrow linewidths. These advantages allow swift alterations in polarization states with minimal modulation energy consumption, which should help for greater control of light in integrated photonic applications.

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