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A customizable,low-power,wireless,embedded sensing platform for resistive nanoscale sensors

microsystems & Nanoengineering 2022年第1期8卷 111-121页

作者： Stefan Nedelcu Kishan Thodkar Christofer Hierold micro-and Nanosystems Department of Mechanical and Process EngineeringETH ZurichTannenstrasse 38092 ZurichSwitzerland

Customizable,portable,battery-operated,wireless platforms for interfacing high-sensitivity nanoscale sensors are a means to improve spatiotemporal measurement coverage of physical *** a platform can enable the expansion of IoT for environmental and lifestyle *** we report a platform capable of acquiring currents ranging from 1.5 nA to 7.2μA full-scale with 20-bit resolution and variable sampling rates of up to 3.125 *** addition,it features a bipolar voltage programmable in the range of-10 V to+5 V with a 3.65 mV resolution.A Finite State Machine steers the system by executing a set of embedded *** FSM allows for dynamic,customized adjustments of the nanosensor bias,including elevated bias schemes for self-heating,measurement range,bandwidth,sampling rate,and measurement time ***,it enables data logging on external memory(SD card)and data transmission over a Bluetooth low energy *** average power consumption of the platform is 64.5 mW for a measurement protocol of three samples per second,including a BLE advertisement of a 0 dBm transmission power.A state-of-the-art(SoA)application of the platform performance using a CNT nanosensor,exposed to NO_(2) gas concentrations from 200 ppb down to 1 ppb,has been *** sensor signals are measured for NO_(2) concentrations of 1 ppb,the 3σlimit of detection(LOD)of 23 ppb is determined(1σ:7 ppb)in slope detection mode,including the sensor signal variations in repeated *** platform’s wide current range and high versatility make it suitable for signal acquisition from resistive nanosensors such as silicon nanowires,carbon nanotubes,graphene,and other 2D *** with its overall low power consumption,the proposed platform is highly suitable for various sensing applications within the context of IoT.

关键词： power IoT enable

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SiC nanowire-based SU-8 with enhanced mechanical properties for MEMS structural layer design

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nanotechnology and Precision Engineering 2019年第4期2卷 169-176页

作者： Yu Yang Liyan Lai Guifu Ding Ting Chen National Key Laboratory of Science and Technology on micro/Nano Fabrication Shanghai Jiao Tong University

In addition to being used for pattern transfer,the negative photoresist SU-8 iswidely used as a structural material in microelectromechanical systems(MEMS).Due to its good photopatternability,SU-8 has lower manufacturing costs than many other materials,but its mechanical properties are relatively weak to some extent,which limits its *** mechanical properties of epoxy-like SU-8 can be enhanced by addingmicro-or nano-fillers such as carbon nanotube,clay,and SiC nanowire,which have superior elastic *** this study,SiC nanowires were used to improve the mechanical properties of SU-8 while the SU-8 retains its *** SiC nanowires were uniformly dispersed in SU-8 by stirring and ***-8 materials with different SiC nanowire contents were fabricated into dog bone samples by *** elastic modulus,storage modulus,and damping factor of the samples were measured by the Dynamic mechanical analysis(DMA)*** experiment result shows that the rigidity and toughness increased,and the damping *** 2 wt%SiC nanowires-reinforced SU-8 had a 73.88%increase in elastic modulus and a 103.4%increase in elongation at ***,a spring component made by SiC-doped SU-8 could withstand greater *** SiC nanowires-reinforced SU-8 has the potential tomeet higher requirements in the design andmanufacture of MEMS and greatly reduce the manufacturing costs of MEMS devices.

关键词： SU-8 SiC nanowires Elastic modulus Dynamic mechanical analysis(DMA)

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Mechanical properties and enhancement mechanisms of titanium-graphene nanocomposites

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Acta Mechanica Sinica 2020年第4期36卷 855-865页

作者： Wanhong Tang Jie Zhang Jianyang Wu Jinyou Shao Peng Ding Guozhen Hou Xiaoming Chen micro-and nanotechnology Research Center State Key Laboratory for Manufacturing Systems EngineeringXi'an Jiaotong UniversityXi'an 710049China Electronic Materials Research Lab Key Lab of the Ministry of EducationXi’an Jiaotong UniversityXi’an 710049China Department of Physics Jiujiang Research Institute and Research Institute for Biomimetics and Soft MatterFujian Provincial Key Laboratory for Soft Functional Materials ResearchXiamen UniversityXiamen 361005China

Molecular dynamics(MD)simulations of the titanium-graphene nanocomposites(TiGNCs)under uniaxial tension are carried out to investigate the mechanical properties and reinforcement mechanism of graphene in *** is found that introduction of mechanically robust graphene limits the strain-induced dislocation and araorphization and thereby highly improves the mechanical properties of metallic titanium that are greatly affected by the crystal stacking orientation of graphene and titanium *** thickness of titanium layers,interface interaction and working temperature play an important role in the mechanical strength and elastic moduli of *** results show the mechanical properties of TiGNCs are monotonically enhanced with reduction of the titanium layer thickness and working temperature,and the Young5s modulus obtained by MD simulation are higher than that predicted by the rule of mixture(ROM)due to consideration of interfacial interaction in computational *** addition,once the critical thickness of titanium layer is reached,graphene wrinkles are induced in composites because of Poisson's effect induced large lateral compression stress in the interface *** study provides helpful insights into fundamental understanding reinforcing mechanism of graphene and ultimately contribute to the optimal design and performance of mechanically robust graphene-based metallic composites.

关键词： Mechanical properties Enhancement mechanisms Titanium-graphene composites Wrinkling Molecular dynamics

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Manipulating fluid with vibrating 3D-printed paddles for applications in micropump

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nanotechnology and Precision Engineering 2019年第3期2卷 95-104页

作者： Zhiyong Tang Xiufeng Shao Jianze Huang Jinyuan Yao Guifu Ding National Key Laboratory of Science and Technology on micro/Nano Fabrication Shanghai Jiao Tong University

This paper presents a novel working mechanism of a micropump using micropaddles(MPs)to actively manipulate fluid based on 3 D printing *** novel working principle is systematically discussed using analysis,computation and experiment methods.A theoretical model is established to research the working mechanism and crucial parameters for driving ability,such as MPs shape,size,vibration amplitude and *** different 3 D printing techniques that simplify the multi-step process into only one step are introduced to manufacture the prototype pump for investigating the principle experimentally.A testing system is designed to evaluate the flow rate of pumps with eight different vibrating paddles.A maximum flux of 127.9 mL/min is obtained at an applied voltage of 9 *** experiments show that the active-type mechanical pump could not only freely control flow direction but also change flux by adopting different shapes or distribution *** advantage of the novel micropump is the application of the MP structure into the micropump system to actively manipulate fluid with flexibility and high driving ability at fairly low power.

关键词： micropump Manipulate fluid Vibrating micropaddles 3D printing Fluid-structure interaction

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Bioinspired MXene-Based User-Interactive Electronic Skin for Digital and Visual Dual-Channel Sensing

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Nano-micro Letters 2022年第7期14卷 228-245页

作者： Wentao Cao Zheng Wang Xiaohao Liu Zhi Zhou Yue Zhang Shisheng He Daxiang Cui Feng Chen Department of Orthopedic School of MedicineSpinal Pain Research InstituteShanghai Tenth People’s HospitalTongji UniversityShanghai 200072People’s Republic of China National Engineering Research Center for nanotechnology Shanghai 200241People’s Republic of China Institute of micro-Nano Science and Technology School of Electronic Information and Electrical EngineeringShanghai Jiao Tong UniversityShanghai 200240People’s Republic of China

User-interactive electronic skin(e-skin) that could convert mechanical stimuli into distinguishable outputs displays tremendous potential for wearable devices and health care applications. However, the existing devices have the disadvantages such as complex integration procedure and lack of the intuitive signal display function. Here, we present a bioinspired user-interactive e-skin, which is simple in structure and can synchronously achieve digital electrical response and optical visualization upon external mechanical stimulus. The e-skin comprises a conductive layer with a carbon nanotubes/cellulose nanofibers/MXene nanohybrid network featuring remarkable electromechanical behaviors, and a stretchable elastomer layer, which is composed of silicone rubber and thermochromic pigments. Furthermore, the conductive nanohybrid network with outstanding Joule heating performance can generate controllable thermal energy under voltage input and then achieve the dynamic coloration of silicone-based elastomer. Especially, such an innovative fusion strategy of digital data and visual images enables the e-skin to monitor human activities with evermore intuition and accuracy. The simple design philosophy and reliable operation of the demonstrated e-skin are expected to provide an ideal platform for next-generation flexible electronics.

关键词： MXene Electronic skin Electromechanical behavior Joule heating Visualization

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Surface Acoustic Wave Device with Reduced Insertion Loss by Electrospinning P(VDF–TrFE)/ZnO Nanocomposites

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Nano-micro Letters 2016年第3期8卷 282-290页

作者： Robin Augustine Frederic Sarry Nandakumar Kalarikkal Sabu Thomas Laurent Badie Didier Rouxel International and Inter University centre for Nanoscience and nanotechnology Mahatma Gandhi University Department of Materials Science and Engineering Technion-Israel Institute of Technology Institut Jean Lamour Universiéde Lorraine CNRS School of Pure and Applied Physics Mahatma Gandhi University School of Chemical Sciences Mahatma Gandhi University

Surface acoustic wave(SAW) devices have been utilized for the sensing of chemical and biological phenomena in microscale for the past few decades. In this study, SAW device was fabricated by electrospinning poly(vinylidenefluoride-co-trifluoroethylene)(P(VDF-TrFE)) incorporated with zinc oxide(ZnO) nanoparticles over the delay line area of the SAW device. The morphology, composition, and crystallinity of P(VDF-TrFE)/ZnO nanocomposites were investigated. After measurement of SAW frequency response, it was found that the insertion loss of the SAW devices incorporated with ZnO nanoparticles was much less than that of the neat polymer-deposited device. The fabricated device was expected to be used in acoustic biosensors to detect and quantify the cell proliferation in cell culture systems.

关键词： Surface acoustic wave SAW P(VDF-TrFE) ZnO Biosensor

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The interplay between (electro)chemical and (chemo)mechanical effects in the cycling performance of thiophosphate-based solid-state batteries

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Materials Futures 2022年第1期1卷 122-134页

作者： Jun Hao Teo Florian Strauss Felix Walther Yuan Ma Seyedhosein Payandeh Torsten Scherer Matteo Bianchini Jürgen Janek Torsten Brezesinski Battery and Electrochemistry Laboratory Institute of NanotechnologyKarlsruhe Institute of Technology(KIT)Hermann-von-Helmholtz-Platz 176344 Eggenstein-LeopoldshafenGermany Institute of Physical Chemistry&Center for Materials Research Justus-Liebig-University GiessenHeinrich-Buff-Ring 1735392 GiessenGermany KNMF Laboratory for micro-and Nanostructuring Institute of NanotechnologyKarlsruhe Institute of Technology(KIT)Hermann-von-Helmholtz-Platz 176344 Eggenstein-LeopoldshafenGermany BASF SE Carl-Bosch-Str.3867056 LudwigshafenGermany

Solid-state batteries(SSBs)are a promising next step in electrochemical energy storage but are plagued by a number of *** this study,we demonstrate the recurring issue of mechanical degradation because of volume changes in layered Ni-rich oxide cathode materials in thiophosphate-based ***,we explore superionic solid electrolytes(SEs)of different crystallinity,namely glassy 1.5Li_(2)S-0.5P_(2)S_(5)-LiI and argyrodite Li_(6)PS_(5)Cl,with emphasis on how they affect the cyclability of slurry-cast cathodes with NCM622(60%Ni)or NCM851005(85%Ni).The application of a combination of ex situ and in situ analytical techniques helped to reveal the benefits of using a SE with a low Young’s *** a synergistic interplay of(electro)chemical and(chemo)mechanical effects,the glassy SE employed in this work was able to achieve robust and stable interfaces,enabling intimate contact with the cathode material while at the same time mitigating volume *** results emphasize the importance of considering chemical,electrochemical,and mechanical properties to realize long-term cycling performance in high-loading SSBs.

关键词： solid-state battery slurry casting lithium thiophosphate electrolyte Ni-rich NCM cathode degradation

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Perspective on how laser-ablated particles grow in liquids

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Science China(Physics,Mechanics & Astronomy) 2017年第7期60卷 1-16页

作者： DongShi Zhang Jun Liu ChangHao Liang Key Laboratory of Materials Physics and Anhui Key Laboratory of Nanomaterials and nanotechnology Institute of Solid State Physics Chinese Academy of Sciences Hefei 230031 China

Laser ablation in liquids has emerged as a new branch of nanoscience for developing various nanomaterials with different ***, how to design and control nanomaterial growth is still a challenge due to the unique chemical-physical process chain correlated with nanomaterial nucleation and growth, including plasma phase(generation and rapid quenching), gas(bubble) phase,and liquid phase. In this review, through summarizing the literature about this topic and comparing with the well-established particle growth mechanisms of the conventional wet chemistry technique, our perspective on the possible nanoparticle growth mechanisms or routes is presented, aiming at shedding light on how laser-ablated particles grow in liquids. From the microscopic viewpoint, the nanoparticle growth contains six mechanisms, including LaMer-like growth, coalescence, Ostwald ripening, particle(oriented) attachment, adsorbate-induced growth and reaction-induced growth. For each microscopic growth mechanism, the vivid growth scenes of some representative nanomaterials recorded by TEM and SEM measurements are displayed. Afterwards,the scenes from the macroscopic viewpoint for the large submicro-and micro-scale nanospheres and anisotropic nanostructures formation and evolution from one nanostructure into another one are presented. The panorama of how diverse nanomaterials grow during and after laser ablation in liquids shown in this review is intended to offer a overview for researchers to search for the possible mechanisms correlated to their synthesized nanomaterials, and more expectation is desired to better design and tailor the morphology of the nanocrystals synthesized by LAL technique.

关键词： laser ablation in liquids nanoparticle growth mechanism coalescence particle attachment Ostwald ripening adsorbate-induced growth reaction-induced growth self-assembly self-splitting

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NiFe-based nanostructures on nickel foam as highly efficiently electrocatalysts for oxygen and hydrogen evolution reactions

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Journal of Energy Chemistry 2019年第12期28卷 39-53页

作者： Wei Zhang Daohao Li Longzhou Zhang Xilin She Dongjiang Yang State Key Laboratory of Bio-Fibers and Eco-Textiles Shandong Collaborative Innovation Center of Marine Biobased Fiber and Ecological TextileInstitute of Marine Biobased MaterialsCollege of Environment Science and EngineeringQingdao UniversityQingdao 266071ShandongChina School of Materials Science and Engineering Yunnan Key Laboratory for Micro/Nano Materials&TechnologyYunnan UniversityKunming 650091YunnanChina School of Natural Sciences and Queensland Micro-and Nanotechnology CentreGriffith UniversityNathan Campus 4111Australia

Water splitting,as an advanced energy conversion technology,consists of two half reactions,including oxygen evolution reaction(OER)and hydrogen evolution reaction(HER).However,the ideal electrocatalysts are noble metal based *** high cost and scarcity in earth seriously restrict the large *** Fe-based materials have attracted great attention in recent years due to their excellent catalytic properties for OER and ***,their conductivity and electrochemical stability at high current density are unsatisfactory,resulting in ineffective water splitting due to high impedance and low ***,a series of catalysts coating Ni Fe-based materials on 3 D nickel foam were found to be extremely stable under the circumstance of high current *** this review,we summarized the recent advances of NiFe-based materials on nickel foam for OER and HER,respectively,and further provided the perspectives for their future development.

关键词： Electrocatalysis NiFe compound Nickel foam HER OER

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Manipulating functional groups between polyvinylidene difluoride and nanoparticles for high-performance triboelectric nanogenerator

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Nano Research 2023年第9期16卷 11855-11861页

作者： Zekun Li Lu Zhang Lihao Guo Wenwen Hu Aifang Yu Junyi Zhai CAS Center for Excellence in Nanoscience Beijing Key Laboratory of Micro-Nano Energy and SensorBeijing Institute of Nanoenergy and NanosystemsChinese Academy of SciencesBeijing 101400China School of Nanoscience and Technology University of Chinese Academy of SciencesBeijing 100049China School of Advanced Materials and nanotechnology Interdisciplinary Research Center of Smart SensorsXidian UniversityXi’an 712000China School of Aerospace Science and Technology Xidian UniversityXi’an 712000China

Interface functional groups play an essential role in regulating the electrical properties of bulk *** this work,we designed a novel strategy to explore a new way to enhance triboelectric performance by regulating the functional groups between nano-fillers and polymer matrix without obvious changes in the dielectric *** silica nanoparticles(SNPs)modified perfluoro-silane coupling agents(PFSCAs)with different chain lengths were added to the polyvinylidene difluoride to regulate the transferred charge density(TCD)of triboelectric nanogenerators(TENGs).When the doping concentration of perfluorodecyl modified SNPs is 2.25 wt.%,the nanocomposite film based TENG exhibits the maximum TCD of 166μC/m^(2)and power density of 3.12 W/m^(2)which are 6 times and 39 times as big as those of pure polyvinylidene difluoride(PVDF)*** charge accumulation and decay process show that interface functional groups dominate the performance of ***,a Fermi level model is proposed and why the TCD could be regulated by the concentration of nanoparticles in bulk materials is *** work provides a new concept for understanding the performance of TENG independent dielectric constant and points out a new direction for enhancing TENG’s performance,since wealthy functional groups with selectivity are applicable.

关键词： triboelectric nanogenerators functional groups surface modification interfacial regulation transferred charge density

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