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A button switch inspired duplex hydrogel sensor based on both triboelectric and piezoresistive effects for detecting dynamic and static pressure

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Nanotechnology and Precision Engineering 2022年第2期5卷 12-20页

作者： zhensheng chen Jiahao Yu Xiaoxi Zhang Haozhe Zeng Yunjia Li Jin Wu Kai Tao Ministry of Education Key Laboratory of Micro and Nano Systems for Aerospace Northwestern Polytechnical UniversityXi’an 710072China AVIC Xi’an Aircraft Industry Group Company Ltd. Xi’an 710089China School of Electrical Engineering Xi’an Jiaotong UniversityXi’an 710049China State Key Laboratory of Optoelectronic Materials and Technologies and the Guangdong Province Key Laboratory of Display Material and Technology School of Electronics and Information TechnologySun Yat-sen UniversityGuangzhou 510275China

The capability to sense complex pressure variations comprehensively is vital for wearable electronics and flexible human–machine *** this paper,inspired by button switches,a duplex tactile sensor based on the combination of triboelectric and piezoresistive effects is designed and *** of its excellent mechanical strength and electrical stability,a double-networked ionic hydrogel is used as both the conductive electrode and elastic current *** addition,micro-pyramidal patterned polydimethylsiloxane(PDMS)acts as both the friction layer and the encapsulation elastomer,thereby boosting the triboelectric output performance *** duplex hydrogel sensor demonstrates comprehensive sensing ability in detecting the whole stimulation process including the dynamic and static *** dynamic stress intensity(10–300 Pa),the action time,and the static variations(increase and decrease)of the pressure can be identified precisely from the dual-channel *** with a signal processing module,an intelligent visible door lamp is achieved for monitoring the entire“contact–hold–release–separation”state of the external stimulation,which shows great application potential for future smart robot e-skin and flexible electronics.

关键词： Duplex hydrogel sensor Triboelectric nanogenerator Piezoresistive sensor Dynamic and static sensing

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Hydrogen and Oxygen Isotope Fractionation Mechanism in the Hydrothermal System and Its Geologic Significance

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Acta Geologica Sinica(English Edition) 1992年第4期66卷 397-409页

作者： chen zhensheng Zhang Ligang Yichang Institute of Geology and Mineral Resources, Chinese Academy of Geological Sciences, Yichang, Hubei Jiang Minxi Yichang Institute of Geology and Mineral Resources Chinese Academy of Geological Sciences Yichang Hubei

The geochemical behaviors of hydrogen and oxygen isotopes in the hydrothermal system and their inher-ent relationship with the water / rock exchange are discussed in this paper In addition to the temperature con-ditions, the effective W / R ratio is another factor controlling the changes in H and O isotope compositions ofthe altered rock and hydrothermal water. Besides, the application and geological significance of the water-rockexchange theory are also discussed in the light of the H and O isotope compositions and their variation charac-teristics of the mineralizing hydrothermal water and altered rocks from several mineral deposits. Finally, abrief evolutional model of H and O istotope compositions of meteoric and magmatic hydrothermal waters in ahydrothermal system is given.

关键词： hydrothermal system isotope fractionation mechanism water/rock exchnage effective W/R ratio evolutional model

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Hierarchical Honeycomb-Structured Electret/Triboelectric Nanogenerator for Biomechanical and Morphing Wing Energy Harvesting

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Nano-Micro Letters 2021年第8期13卷 136-151页

作者： Kai Tao zhensheng chen Haiping Yi Ruirong Zhang Qiang Shen Jin Wu Lihua Tang Kangqi Fan Yongqing Fu Jianmin Miao Weizheng Yuan Ministry of Education Key Laboratory of Micro and Nano Systems for Aerospace Northwestern Polytechnical UniversityX’ian 710072People’s Republic of China State Key Laboratory of Optoelectronic Materials and Technologies Key Laboratory of Display Material and TechnologySchool of Electronics and Information TechnologySun Yat-Sen UniversityGuangzhou 510275People’s Republic of China Department of Mechanical Engineering University of Auckland20 Symonds StreetAuckland 1010New Zealand School of Mechano-Electronic Engineering Xidian UniversityX’ian 710071People’s Republic of China Faculty of Engineering and Environment Northumbria UniversityNewcastle upon Tyne NE18STUK School of Electronic Information and Electrical Engineering Shanghai Jiao Tong UniversityShanghai 200240People’s Republic of China

Flexible,compact,lightweight and sustainable power sources are indispensable for modern wearable and personal electronics and small-unmanned aerial vehicles(UAVs).Hierarchical honeycomb has the unique merits of compact mesostructures,excellent energy absorption properties and considerable weight to strength ***,a honeycomb-inspired triboelectric nanogenerator(h-TENG)is proposed for biomechanical and UAV morphing wing energy harvesting based on contact triboelectrification wavy surface of cellular honeycomb *** wavy surface comprises a multilayered thin film structure(combining polyethylene terephthalate,silver nanowires and fluorinated ethylene propylene)fabricated through high-temperature thermoplastic molding and wafer-level bonding *** superior synchronization of large amounts of energy generation units with honeycomb cells,the manufactured h-TENG prototype produces the maximum instantaneous open-circuit voltage,short-circuit current and output power of 1207 V,68.5μA and 12.4 mW,respectively,corresponding to a remarkable peak power density of 0.275 mW cm^(−3)(or 2.48 mW g^(−1))under hand pressing *** to the excellent elastic property of self-rebounding honeycomb structure,the flexible and transparent h-TENG can be easily pressed,bent and integrated into shoes for real-time insole plantar pressure *** lightweight and compact h-TENG is further installed into a morphing wing of small UAVs for efficiently converting the flapping energy of ailerons into electricity for the first *** research demonstrates this new conceptualizing single h-TENG device’s versatility and viability for broad-range real-world application scenarios.

关键词： Honeycomb-inspired structure Morphing wing energy harvesting Electret power generation Triboelectric nanogenerator Self-powered insole pressure mapping

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Hydrogen and Oxygen Isotope Study on the Water-Rock Interaction of the Yinshan (Cu-) Pb-Zn-Ag Ore Deposit, Jiangxi Province

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Acta Geologica Sinica(English Edition) 1996年第3期70卷 274-289页

作者： Zhang Ligang, Liu Jingxiu, Yu Guixiang and chen zhensheng Yichang Institute of Geology and Mineral Resources, CAGS, Yichang, Hubei Jiang Minxi Y ichang Institute of Geology and Mineral Resources CAGS Yichang Hubei

The δ18O values of vein quartz of different stages from the Yinshan ore deposit are constant around 16‰ and the calculated δ18OH2O values attain 8‰± ; the δDH2O values of fluid inclu-sions in vein quartz are constant at about-60‰. From the surface down to 1200 m below the δ18O values of altered rocks gradually decrease from 15‰± to 11‰± . Various water-rock inversion calculations indicate that the ore fluids were formed by the interaction between meteoric water and phyllite at 350℃ and the effective W/ R value of around 0.1. When the water-rock exchange in the upper mineralization system took place, the effective W / R value increased to 5.0 or more. As a result, an evolution and mineralization model of a buffered open system with two-stage water-rock interactions is proposed in this study.

关键词： H and O isotopes water-rock exchange buffered open system Yinshan of Jiangxi Province

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Synergistic promotion of HER and OER by alloying ternary Zn‐Co‐Ni nanoparticles in N‐doped carbon interfacial structures

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Chinese Journal of Catalysis 2022年第5期43卷 1316-1323页

作者： Limei Lu Yihe Zhang zhensheng chen Feng Feng Kaixuan Teng Shuting Zhang Jialin Zhuang Qi An Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes National Laboratory of Mineral MaterialsSchool of Materials Science and TechnologyChina University of GeosciencesBeijing 100083China

Catalytic water splitting potentially reduce the consumption of fossil fuels and has received intense research *** effects in multi‐element transition metal‐based water splitting catalysts have evoked special *** on catalysts in interfacial structures are especially meaningful due to their pertinence in *** this study,we report the synergy effects in promoting catalytic power in the ternary transition metal Zn,Co,Ni alloy nanoparticles that embeds in the carbonized Ppy/CNT multilayered *** comparison with a series of binary or single metal counterparts,the mechanism under the synergy effects are *** and DFT calculation results indicate that the ternary transition metal catalysts in the N‐doped carbon matrix present special electronic structure,which benefits the reversible transition‐state adsorption in HER and OER and render the catalysts high conductivity in room *** expect our findings inspire further development of efficient transition metal HER and OER catalysts.

关键词： Water splitting Hydrogen evolution reaction Oxygen evolution reaction Diversity of elements Electron modification

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基于全绕组拓扑结构的移相变压器建模及应用

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电力自动化设备 2022年第12期42卷 101-106页

作者：李晓华陈镇生罗一杰刘玮屠卿瑞华南理工大学电力学院广东广州510640 广东电网有限责任公司电力调度控制中心广东广州510600

针对现有移相变压器稳态数学模型不能适用于内外部端口故障电气量计算的问题,基于相分量法建立其全相数学模型。以对称双芯式移相变压器为例,根据其电磁约束关系,推导出节点电压与电流间的关系式,再通过绕组拓扑结构对节点进行合并及接... 详细信息

针对现有移相变压器稳态数学模型不能适用于内外部端口故障电气量计算的问题,基于相分量法建立其全相数学模型。以对称双芯式移相变压器为例,根据其电磁约束关系,推导出节点电压与电流间的关系式,再通过绕组拓扑结构对节点进行合并及接地处理,得到移相变压器的导纳矩阵和全相等效电路模型,并对矩阵进行修正以适应不同故障情况下的计算。最后,利用该模型分析了对称双芯式移相变压器在不同相序网络中的运行特性。对比仿真结果可知,所建全相数学模型能够准确计算各类端口故障下的电气量,所得等效相序电路可以有效反映不同序分量下移相变压器的运行特性。

关键词：对称式双芯移相变压器绕组连接相分量法全相数学模型运行特性

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