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OSCILLATION　FREQUENCY　THEORY　OF　A　PIEZOELECTRIC　SENSOR　INLIQUID　PHASE　WITH　TWO　SEPARATED－electrodes

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Chinese Chemical Letters 1996年第2期7卷 169-172页

作者： Da Zhong SHEN Ze Chang LIU Qing KANG Jind Tian HU(Chemistry College, Shandong University, Jinan, 250100)(Chemical Engineering Department, Jinan Branch of Shandong Institute of Mining and Technology, Jinan, 280031) Chemistry College Shandong University Jinan 250100 Chemical Engineering Department Jinan Branch Shandong Institute of Mining and Technology Jinan 250031

In this paper, an oscillation frequency equation for a pizoelectric sensor with two separated-electrodes is theoretically derived and experimentally verified. The correlatione of the oscillation frequency and the liqu... 详细信息

关键词： SENSOR FREQUENCY INLIQUID OF OSCILLATION PHASE PIEZOELECTRIC electrodes SEPARATED THEORY

The Self-Assembling Growth of Copper Nanowires for Transparent electrodes

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Journal of Wuhan University of Technology(Materials Science) 2019年第1期34卷 145-149页

作者： WU Junqing HUANG Fuzhi State Key Laboratory of Advanced Technology for Materials Synthesis and Processing School of Materials Science and Engineering Wuhan University of Technology School of Aerospace Transport and Manufacturing Cranfield University

Long(15-40 μm), thin(diameter of 20 ± 5 nm), and well-dispersed CuNWs Cu nanowires were prepared. The high-resolution TEM and selected area electron diffraction showed that the CuNWs were single-crystalline. To investigate the growth mechanism, we examined the microstructure of these CuNWs at different reaction time. It was found that the CuNWs were actually formed through the self-assembling of Cu nanoparticles along the [110] direction. The transparent electrodes fabricated using the CuNWs achieved a high transparency of 76 % at 31±5 Ω/□.

关键词： Cu nanowires growth mechanism self-assembling transparent electrodes

MICROSTRUCTURE AND PROPERTIES OF DEEP CROGENIC TREATMENT electrodes FOR SPOT WELDING HOT DIP GALVANIZED STEEL

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Chinese Journal of Mechanical Engineering 2005年第1期18卷 17-20页

作者： WuZhisheng LiuCuirong WangJiuhai ShanPing HuShengsun LianJinrui SchoolofMaterialsScience TaiyuanUniversityofScienceandTechnologyTaiyuan030024China SchoolofMaterialsScience TianjinUniversityTianjin300072China

The microstructure and elements distribution of the deep cryogenic treatmentelectrodes and non-cryogenic treatment electrodes for spot welding hot dip galvanized steel areobserved by a scanning electrical microscope. The grain sizes, the resistivity and the hardness ofthe electrodes before and after deep cryogenic treatment are measured by X-ray diffraction, the DCdouble arms bridge and the Brinell hardness testing unit respectively. The spot welding processperformance of hot dip galvanized steel plate is tested and the relationship between microstructureand physical properties of deep cryogenic treatment electrodes is analyzed. The experimental resultsshow that deep cryogenic treatment makes Cr, Zr in deep cryogenic treatment electrodes emanatedispersedly and makes the grain of deep cryogenic treatment electrodes smaller than non-cryogenictreatment ones so that the electrical conductivity and the thermal conductivity of deep cryogenictreatment electrodes are improved very much, which make spot welding process performance of the hotdip galvanized steel be improved.

关键词： Deep cryogenic treatment electrodes Microstructure Spot welding Galvanized steel

Two-Phase Flow in Porous electrodes of Proton Exchange Membrane Fuel Cell

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Transactions of Tianjin University 2020年第3期26卷 197-207页

作者： Daokuan Jiao Kui Jiao Qing Du State Key Laboratory of Engines Tianjin University135 Yaguan RoadTianjin 300350China

Water management in porous electrodes bears significance due to its strong potential in determining the performance of proton exchange membrane fuel *** terms of porous electrodes,internal water distribution and removal process have extensively attracted attention in both experimental and numerical ***,the structural difference among the catalyst layer(CL),microporous layer(MPL),and gas diffusion layer(GDL)leads to significant challenges in studying the two-phase flow *** the different porosities and pore scales of the CL,MPL,and GDL,the model scales in simulating each component are *** review emphasizes the numerical simulation related to porous electrodes in the water transport process and evaluates the effectiveness and weakness of the conventional methods used during the *** limitations of existing models include the following:(i)The reconstruction of geometric models is difficult to achieve when using the real characteristics of the components;(ii)the computational domain size is limited due to massive computational loads in three-dimensional(3 D)simulations;(iii)numerical associations among 3 D models are lacking because of the separate studies for each component;(iv)the effects of vapor condensation and heat transfer on the two-phase flow are disregarded;(v)compressive deformation during assembly and vibration in road conditions should be considered in two-phase flow studies given the real operating ***,this review is aimed at critical research gaps which need further *** potential research directions are also suggested for future improvements.

关键词： PEMFC Porous electrodes Two-phase flow Water management

Bringing sensation to prosthetic hands-chronic assessment of implanted thin-film electrodes in humans

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npj Flexible Electronics 2023年第1期7卷 32-45页

作者： PaulČvančara Giacomo Valle Matthias Müller Inga Bartels Thomas Guiho Arthur Hiairrassary Francesco Petrini Stanisa Raspopovic Ivo Strauss Giuseppe Granata Eduardo Fernandez Paolo M.Rossini Massimo Barbaro Ken Yoshida Winnie Jensen Jean-Louis Divoux David Guiraud Silvestro Micera Thomas Stieglitz Laboratory for Biomedical Microtechnology Department of Microsystems Engineering-IMTEKAlbert-Ludwig-University FreiburgFreiburgGermany Center for Neuroprosthetics and Institute of Bioengineering School of EngineeringÉcole Polytechnique Fédérale de Lausanne(EPFL)LausanneSwitzerland The Biorobotics Institute Scuola Superiore Sant’AnnaPisaItaly Camin Team INRIAUniversity of MontpellierMontpellierFrance Institute of Neurology Catholic University of the Sacred HeartRomaItaly Institute of Neurosurgery Catholic University of the Sacred HeartRomaItaly Department of Neuroscience&Neurorehabilitation IRCCS San Raffaele Roma00166 RomeItaly Department of Electrical and Electronic Engineering University of CagliariCagliariItaly Biomedical Engineering Department Indiana University-Purdue UniversityIndianapolisINUSA SMI Dept.Health Science and TechnologyAalborg UniversityAalborgDenmark AXONIC/Groupe MXM VallaurisFrance BrainLinks-BrainTools Albert-Ludwig-University FreiburgFreiburgGermany Bernstein Center Freiburg Albert-Ludwig-University FreiburgFreiburgGermany Present address:Laboratory for Neuroengineering Department of Health Sciences and TechnologyInstitute for Robotics and Intelligent SystemsETH ZürichZürichSwitzerland

Direct stimulation of peripheral nerves with implantable electrodes successfully provided sensory feedback to amputees while using hand *** of the electrodes is key to success,which we have improved for the polyimide-based transverse intrafascicular multichannel electrode(TIME).The TIMEs were implanted in the median and ulnar nerves of three trans-radial amputees for up to six *** present a comprehensive assessment of the electrical properties of the thin-film metallization as well as material status post *** TIMEs stayed within the electrochemical safe limits while enabling consistent and precise amplitude *** lead to a reliable performance in terms of eliciting *** signs of corrosion or morphological change to the thin-film metallization of the probes was observed by means of electrochemical and optical *** presented longevity demonstrates that thin-film electrodes are applicable in permanent implant systems.

关键词： film electrodes sensation

Experimental Study of electrodes Parameters Effects on Small Diffusion Combustion Flame

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Journal of Harbin Institute of Technology(New Series) 2015年第3期22卷 107-114页

作者： Tieqiu Huang Qi Chen Limin Yan Yiting Zhang School of Mechanical Electronic and Control EngineeringBeijing Jiaotong University

To study the configuration and conductivity effects on micro-scale methane-air flames by electric field and iron wind,different electric field forces and iron winds are generated by needle,circle and plate electrodes respectively in different electrodes heights under both AC and DC fields though experiments. Experimental results showed that the flame characteristics are affected by needle electrodes mainly through the action of ion wind,by plate type electrodes mainly through the action of electric field force and by annular electrodes through both the electric field force and ion wind at the same time. Under DC field 's effects of all electrodes types,the flame will consequently go down while the voltage reached to a limit value,and it will breakdown under the strong effect of the ion wind by needle electrodes. The results also showed the influence by different electrodes types to the current characteristics,resistance properties and configuration of themicro-scale flames.

关键词： electrodes diffusion flame voltage current characteristic flame resistance

Recent advances in flexible noninvasive electrodes for surface electromyography acquisition

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npj Flexible Electronics 2023年第1期7卷 139-164页

作者： Lian Cheng Jun Li Aiying Guo Jianhua Zhang School of Microelectronics Shanghai University201800 ShanghaiChina Key Laboratory of Advanced Display and System Applications Ministry of EducationShanghai University200072 ShanghaiPeople’s Republic of China

Surface electromyography(sEMG)is used to detect and analyze human muscle ***,flexible noninvasive electrodes(FNEs)have emerged to extract bioelectrical signals from individual *** FNEs to be deployed as a central component of physiological signal acquisition,the quest for elevated signal-to-noise ratio and density is compelling owing to the small amplitude of ***,we review recent progress in FNEs for sEMG *** summarize the needed properties of FNEs,compare the differences between passive electrodes and active electrodes and exemplify applications of *** also conclude the current challenges and future opportunities in sEMG acquisition.

关键词： potential. electrodes surface

Vapor dealloying of ultra-thin films: a promising concept for the fabrication of highly flexible transparent conductive metal nanomesh electrodes

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npj Flexible Electronics 2019年第1期3卷 50-55页

作者： Adrien Chauvin Willigis Txia Cha Heu Joze Buh Pierre-Yves Tessier Abdel-Aziz El Mel Institut des Matériaux Jean Rouxel IMNUniversitéde NantesCNRS2 rue de la Houssinière B.P.3222944322 Nantes cedex 3France Jožef Stefan Institute Complex matter departmentJamova cesta 391000 LjubljanaSlovenia Center of Excellence on Nanoscience and Nanotechnology Nanocenter Jamova 391000 LjubljanaSlovenia

The booming market of flexible electronic displays has urged the development of highly flexible transparent conductive electrodes(FTCE)1–3 with the ability to replace indium tin oxide(ITO)thin films routinely used as transparent conductive electrodes in photoelectronic *** high cost of indium and the poor mechanical stability of ITO under deformation are the main driving forces behind the development of this research area.4 The use of metal nanomeshes as FTCE is a promising concept with a real potential to substitute ITO in photoelectronic devices.5,6 However,the development of a low-cost fabrication approach allowing producing metal nanomesh electrodes with competitive prices and a high performance remains a real bottleneck for the photoelectronic *** this paper,we report on a robust approach very easy to implement allowing producing highly flexible metal nanomesh electrodes with high performance at a very low *** approach lies on a concept consisting in applying dealloying process to ultra-thin Au-Cu alloy thin films using acidic vapors instead of a liquid phase as routinely done in the *** an appropriate procedure,the nanomeshes can be transferred to any planar or curved support where they can serve as a *** a proof of concept,we demonstrate that using this approach,one can easily fabricate gold nanomesh electrodes transferred onto polyethylene terephthalate(PET)film surface with 79%of transmittance and a sheet resistance as low as 44Ω□^(−1) while maintaining exceptional stability under severe mechanical deformations.

关键词： alloying alloy electrodes

PRIMARY AMINE DRUG SELECTIVE electrodes WITH SPECIAL CROWN ETHERS AS NEUTRAL CARRIERS*

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Science China Chemistry 1990年第12期33卷 1466-1480页

作者：刘昆元俞汝勤 Department of Chemistry and Chemical Engineering Hunan University Changsha 410012 PRC

Ionophores selectively sensitive to primary amines have been synthesized which display low potentiometric selectivity coefficients for K^+, Na^+ and NH_4^+ ions, secondary and tertiary amines as well as quaternary ammonium ions. These ionophores include macrocyclic polyethers with dinaphthyl subunits and azocrown ether with nitrogen donor atoms. The feasibility of these ionophores for preparing primary amine drug selective electrodes was investigated in detail. Practically usable PVC membrane electrodes sensitive to primary amine drugs, such as mexiletine, dopamine, metaraminol and tryptamine, and aliphatic primary amines have been prepared with these ionophores as neutral carriers. Direct potentiometric methods for assaying these drugs have been proposed by using the prepared electrodes. The proposed primary amine drug selective electrodes are remarkably superior to those based on ion-associates. Compared with the electrodes based on common ethers, the interference by K^+, Na^+ and NH_4^+ ions is substantially reduced. A digital simulation of the electrochemical process concerning the membrane transport was performed and some interesting conclusions have been drawn.

关键词： primary amine drug selective electrodes crown ethers with dinaphthyl subunits neutral carriers ionophores