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Flexible self-charging power units for portable electronics based on folded carbon paper

Nano Research 2018年第8期11卷 4313-4322页

作者： Changjie Zhou Yanqin Yang Na Sun Zhen Wen Ping Cheng Xinkai Xie Huiyun Shao Qingqing Shen Xiaoping Chen Yina Liu Zhong Lin Wang Xuhui Sun Institute of Functional Nano & Soft Materials (FUNSOM) Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devicesand Joint International Research Laboratory of Carbon-Based Functional Materials and Devices Soochow University Suzhou215123 China Nantong Textile & Silk Industrial Technology Research Institute Jiangsu Industrial Technology Research Institute af Textile & SilkNantong 226314 China CAS Center for Excellence in nanoscience Beijing Key Laboratory of Micro-nano Energy and Sensor Beijing Institute of Nanoenergyand Nanosystems Chinese Academy of Sciences Beijing 100083 China school of nanoscience and Technology University of Chinese Academy of Sciences Beijing 100049 China school of Materials Science and Engineering Georgia Institute of Technology Atlanta GA 30332-0245 USA Department of Mathematical Sciences Xi'an Jiaotong-Liverpool University Suzhou 215123 China Changjie Zhou Yanqin Yang and Na Sun contributed equally to this work.

The urgent demand for portable electronics has promoted the development of high-efficienc）9 sustainable, and even stretchable self-charging power sources. In this work, we propose a flexible self-charging power unit based on folded carbon （FC） paper for harvesting mechanical energy from human motion and power portable electronics. The present unit mainly consists of a triboelectric nanogenerator （FC-TENG） and a supercapacitor （FC-SC）, both based on folded carbon paper, as energy harvester and storage device, respectively. This favorable geometric design provides the high Young＇s modulus carbon paper with excellent stretchability and enables the power unit to work even under severe deformations, such as bending, twisting, and rolling. In addition, the tensile strain can be maximized by tuning the folding angle of the triangle-folded carbon paper. Moreover, the waterproof property of the packaged device make it washable, protect it from human sweat, and enable it to work in harsh environments. Finally, the as-prepared self-charging power unit was tested by placing it on the human body to harvest mechanical energy from hand tapping, foot treading, and arm touching, successfully powering an electronic watch. This work demonstrates the impressive potential of stretchable self-charging power units, which will further promote the development of high Young＇s modulus materials for wearable/portable electronics.

关键词： self-charging power unit stretchable folded carbon paper triboelectricnanogenerator supercapacitor

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Real-time pressure mapping smart insole system based on a controllable vertical pore dielectric layer

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Microsystems & nanoengineering 2020年第1期6卷 644-653页

作者： Juan Tao Ming Dong Li Li Chunfeng Wang Jing Li Yue Liu Rongrong Bao Caofeng Pan CAS Center for Excellence in nanoscience Beijing Key Laboratory of Micro-nano Energy and SensorBeijing Institute of Nanoenergy and NanosystemsChinese Academy of Sciences100083 BeijingPeople’s Republic of China College of Optoelectronic Engineering Shenzhen University518060 ShenzhenPeople’s Republic of China Beijing Institute of Tracking and Telecommunications Technology 100094 BeijingPeople’s Republic of China Center on Nanoenergy Research School of Physical Science and TechnologyGuangxi UniversityNanningGuangxi 530004People’s Republic of China school of nanoscience and Technology University of Chinese Academy of Sciences100049 BeijingPeople’s Republic of China

Real-time monitoring of plantar pressure has significant applications in wearable biosensors,sports injury detection,and early ***,an all-in-one insole composed of 24 capacitive pressure sensors(CPSs)with vertical pores in an elastic dielectric layer is fabricated by laser *** CPSs with a hexagonal configuration and a pore size of 600μm possess good linearity over a wide detection range of 0–200 kPa with a sensitivity of 12×10^(–3) kPa−***,a smart system including the all-in-one insole with the 24 CPS array,a data acquisition system with a wireless transmitter and a PC terminal with a wireless receiver is established for real-time monitoring to realize static and dynamic plantar pressure *** on this smart insole system,various standing and yoga postures can be distinguished,and variations in the center of gravity during walking can be *** intelligent insole system provides great feasible supervision for health surveillance,injury prevention,and athlete training.

关键词： smart dielectric system

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Three-dimensional Porous Networks of Ultra-long Electrospun SnO_2 Nanotubes with High Photocatalytic Performance

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Nano-Micro Letters 2015年第1期7卷 86-95页

作者： Peng Zhang Lijie Wang Xi Zhang Junhua Hu Guosheng Shao school of Materials Science and Engineering Zhengzhou University International joint Research Laboratory for Low-Carbon & Environmental Materials of Henan Province Zhengzhou University Institute for Renewable Energy and Environmental Technologies University of Bolton

Recent progress in nanoscience and nanotechnology creates new opportunities in the design of novel SnO2 nanomaterials for photocatalysis and photoelectrochemical. Herein, we firstly highlight a facile method to prepare threedimensional porous networks of ultra-long SnO2 nanotubes through the single capillary electrospinning *** with the traditional SnO2 nanofibers, the as-obtained three-dimensional porous networks show enhancement of photocurrent and photocatalytic activity, which could be ascribed to its improved light-harvesting efficiency and high separation efficiency of photogenerated electron–hole pairs. Besides, the synthesis route delivered three-dimensional sheets on the basis of interwoven nanofibrous networks, which can be readily recycled for the desirable circular application of a potent photocatalyst system.

关键词： Electrospinning SnO2 nanotube Photocurrent Photocatalytic Recyclability

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Microfabricated polymer-metal biosensors for multifarious data collection from electrogenic cellular models

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Microsystems & nanoengineering 2023年第2期9卷 167-180页

作者： Charles M.Didier Julia F.Orrico Omar S.Cepeda Trres Jorge Manrique Castro Aliyah Baksh Swaminathan Rajaraman nanoscience Technology Center University of Central Florida4353 Scorpius StreetResearch ISuite 231FL 32816 OrlandoUSA Burnett school of Biomedical Sciences University of Central Florida6900 Lake Nona BlvdFL 32827 OrlandoUSA Department of Biomedical Engineering Polytechnic University of Puerto Rico37700918Ponce de LeonSan JuanPuerto Rico Department of Electrical and Computer Engineering University of Central Florida4238 Scorpius StreetFL 32816 OrlandoUSA Department of Materials Science and Engineering University of Central Florida12760 Pegasus DriveEngineering ISuite 207FL 32816 OrlandoUSA

Benchtop tissue cultures have become increasingly complex in recent years,as more on-a-chip biological technologies,such as microphysiological systems(MPS),are developed to incorporate cellular constructs that more accurately represent their respective biological *** MPs have begun facilitating major breakthroughs in biological research and are poised to shape the field in the coming *** biological systems require integrated sensing modalities to procure complex,multiplexed datasets with unprecedented combinatorial biological *** this work,we expanded upon our polymer-metal biosensor approach by demonstrating a facile technology for compound biosensing that was characterized through custom modeling *** reported herein,we developed a compound chip with 3D microelectrodes,3D microfluidics,interdigitated electrodes(IDEs)and a *** chip was subsequently tested using the electrical/electrochemical characterization of 3D microelectrodes with 1 kHz impedance and phase recordings and IDE-based high-frequency(-1 MHz frequencies)impedimetric analysis of differential localized temperature recordings,both of which were modeled through equivalent electrical circuits for process parameter ***,a simplified antibody-conjugation strategy Was employed for a similar IDE-based analysis of the implications of a key analyte(L-glutamine)binding to the equivalent electrical ***,acute microfluidic perfusion modeling was performed to demonstrate the ease of microfluidics integration into such a polymer-metal biosensor platform for potential complimentary localized chemical ***,our work demonstrates the design,development,and characterization of an accessibly designed polymer-metal compound biosensor for electrogenic cellular constructs to facilitate comprehensive MPS data collection.

关键词： polymer recording breakthrough

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The modulating effect of N coordination on single-atom catalysts researched by Pt-N_(x)-C model through both experimental study and DFT simulation

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Journal of Materials Science & Technology 2021年第32期91卷 160-167页

作者： Mengmeng Fan Jiewu Cui Junjie Zhang Jingjie Wu Shuangming Chen Li Song Zixing Wang Ao Wang Robert Vajtai Yucheng Wu Pulickel MAjayan Jianchun Jiang Dongping Sun Nanjing Forestry University Jiangsu Co-Innovation Center for Efficient Processing and Utilization of Forest ResourcesCollege of Chemical EngineeringNanjing 210037China Rice University Department of Materials Science and NanoEngineeringHoustonTX 77005USA Hefei University of Technology School of Materials Science and EngineeringHefei 230009China University of Cincinnati Department of Chemical and Environmental EngineeringCincinnatiOH 45221USA University of Science and Technology of China National Synchrotron Radiation LaboratoryCAS Center for Excellence in NanoscienceHefei 230026China Nanjing University of Science and Technology Chemicobiology and Functional Materials InstituteNanjing 210094China Key Lab of Biomass Energy and Material Jiangsu ProvinceJiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest ResourcesInstitute of Chemical Industry of Forest ProductsChinese Academy of ForestryNanjing 210042China

N-doped carbon-based single-atom catalysts(NC-SACs) are widely researched in various electrochemical reactions due to high metal atom utilization and catalytic *** catalytic activity of NC-SACs originates from the coordinating structure between single metal site(M) and the doped nitrogen(N) in carbon matrix by forming M-N_(x)-C structure(1≤x≤4).The M-N4-C structure is widely considered to be the most stable and effective catalytic ***,there is no in-depth research for the "x" modulation in Pt-Nx-C structure and the corresponding catalytic ***,atomically dispersed Pt on N-doped carbon(Pt-NC) with Pt-Nx-C structure(1≤x≤4),as a research model,is fabricated by a ZIF-8 template and applied to catalytic oxygen *** carbonization temperatures are used to control N loss,and then modulate the N coordination of Pt-Nx-C *** Pt-NC has the predictable low half-wave potential(E_(1/2)) of 0.72 V vs RHE compared to the Pt/C 20% of 0.81 V due to low Pt ***,the Pt-NC shows a high onset potential(1.10 V vs RHE,determined for j=-0.1 mA cm^(2)) and a high current density of 5.2 mA cm^(-2),more positive and higher than that of Pt/C 20%(0.96 V) and 4.9 mA cm^(-2),*** the structural characterization and DFT simulation confirmed,the reducing PtN coordination number induces low valence of Pt atoms and low free energy of oxygen reduction,which is responsible for the improved catalytic ***,the Pt-NC shows high mass activity(172 times higher than that of Pt/C 20%),better stability and methanol crossover resistance.

关键词： Modulating effect N coordination Single-atom catalysts Pt-N_(x)-C model DFT simulation

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Mass-production of flexible and transparent Te-Au nylon SERS substrate with excellent mechanical stability

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Nano Research 2019年第6期12卷 1483-1488页

作者： Wei-Ran Huang Cheng-Xin Yu Yi-Ruo Lu Hassan Muhammad Jin-Long Wang Jian-Wei Liu Shu-Hong Yu Division of Nanomaterials & Chemistry Hefei National Laboratory for Physical Sciences at the MicroscaleCAS Center for Excellence in NanoscienceHefei Science Center of CASCollaborative Innovation Center of Suzhou Nano Science and TechnologyDepartment of ChemistryUniversity of Science and Technology of ChinaHefei 230026China school of Physics and Materials Science Anhui UniversityHefei 230601China

In the past two decades,the field of surface-enhanced Raman scattering (SERS) has flourished and many rational strategies have been reported for the successful construction of SERS ***,it still lacks the mass-production and programmability for practical applications with arbitrary configurations,and it is highly desirable to develop SERS substrates with strong signal enhancement,large-scale surface area,easy fabrication and low ***,we demonstrate a large-area fabrication (1.5 m × 5 m) of low-cost (18.8 dollars per square meter),highly sensitive,flexible and transparent SERS substrate by a simple solution *** high sensitivity of SERS substrate using 3,3'-diethylthiatricarbocyanine iodide (DTTCI) as probe molecules is strongly dependent on the density and diameter of gold nanoparticles (NPs) on the surface of nylon mesh with the best enhancement factor (EF) of 9.17 × 10^10 and the SERS detection limit of DTTCI molecules is as low as 10-14 M which shows no obvious degradation even after 10,000 cycles of fatigue test,high temperature (above than 160 ℃) and acid-alkali treatment,indicating their excellent stability for the performance in all climates.

关键词： mass-production flexible transparent surface-enhanced Raman scattering gold nanoparticles

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Polarity-triggered anti-Kasha system for high-contrast cell imaging and classification

聚集体(英文)

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聚集体(英文) 2023年第2期4卷 216-226页

作者： Junyi Gong Peifa Wei Junkai Liu Yuncong Chen Zheng Zhao Weijun Zhao Huilin Xie Chao Ma Jacky W.Y.Lam Kam Sing Wong Ying Li Ben Zhong Tang Shenzhen Institute of Aggregate Science and Technology School of Science and EngineeringThe Chinese University of Hong KongShenzhenChina Department of Chemistry Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration and ReconstructionInstitute for Advanced StudyState Key Laboratory of Molecular NanoscienceDivision of Life Science and Department of Chemical and Biological EngineeringThe Hong Kong University of Science and TechnologyClear Water BayKowloonChina Institutes of Physical Science and Information Technology Anhui UniversityHefeiChina Department of Physics HKUSTKowloonChina Guangzhou Municipal and Guangdong Provincial Key Laboratory of Molecular Target and Clinical Pharmacology The NMPA and State Key Laboratory of Respiratory DiseaseInnovation Research Center for AIE Pharmaceutical BiologySchool of Pharmaceutical Sciences and the Fifth Affiliated HospitalGuangzhou Medical UniversityGuangzhouChina Center for AIE Research Shenzhen Key Laboratory of Polymer Science and TechnologyGuangdong Research Center for Interfacial Engineering of Functional MaterialsCollege of Material Science and EngineeringShenzhen UniversityShenzhenChina Center for Aggregation-Induced Emission SCUT-HKUST Joint Research InstituteState Key Laboratory of Luminescent Materials and DevicesSouth China University of TechnologyGuangzhouChina AIE Institute Guangzhou Development DistrictHuangpuChina

Kasha’s rule,which states that all exciton emissions occur from the lowest excited state and are independent of excitation energy,makes high-energy excitons difficult to use and severely hinders the widespread applications of organic photoluminescent materials in the real *** decades,scientists have tried to break this rule to unleash the power of high-energy excitons,but only minimal progress has been achieved,with no rational guiding principles provided,and few applications *** far,breaking Kasha’s rule has remained a purely academic *** this paper,we introduce a design principle for a purely organic anti-Kasha system and synthesise a series of compounds based on the design *** predicted,these compounds all display evident S_(2) emissions in dilute *** addition,we introduce a highly accurate(over 90%)convolutional neural network as an assistant for the classification of cells using anti-Kasha luminogens,thereby providing a new application direction for anti-Kasha systems.

关键词： anti-Kasha cell classification excited-state dynamics fluorescence

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DropLab:an automated magnetic digital microfluidic platform for sample-to-answer point-of-care testing—development and application to quantitative immunodiagnostics

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Microsystems & nanoengineering 2023年第1期9卷 241-252页

作者： Xuyang Hu Xiangyu Gao Songlin Chen Jinhong Guo Yi Zhang China-Singapore International joint Research Institute GuangzhouChina Guangzhou DropLab Scientific Co.Ltd. GuangzhouChina school of Mechanical and Aerospace Engineering Nanyang Technological UniversitySingaporeSingapore DropLab Scientific(Singapore)Pvt.Ltd. SingaporeSingapore school of Sensing Science and Engineering Shanghai Jiao Tong UniversityShanghaiChina school of Electronic Science and Engineering University of Electronic Science and Technology of ChinaChengduChina

In point-of-care testing(POCT),tests are performed near patients and results are given rapidly for timely clinical *** assays are one of the most important analyses for detecting and quantifying protein-based ***,existing POCT immunodiagnostics mainly rely on the lateral flow assay(LFA),which has limited sensitivity or quantification *** other immunodiagnostic assays,such as enzyme-linked immunosorbent assays(ELISAs),offer more sensitive and quantitative results,they require complex liquid manipulations that are difficult to implement in POCT settings by conventional ***,we show the development of DropLab,an automated sample-in-answer-out POCT immunodiagnostic platform based on magnetic digital microfluidic(MDM)*** performs microbead-based ELISA in droplets to offer more sensitive and quantitative testing *** intricate liquid manipulations required for ELISA are accomplished by controlling droplets with magnetic microbeads using MDM technology,which enables us to achieve full automation and easy operations with *** ELISAs(the sample in triplicates and a negative control)can be run in parallel on the thermoformed disposable chip,which greatly improves the throughput and accuracy compared to those of other POCT immunodiagnostic *** was validated by measuring two protein targets and one antibody *** testing results showed that the limit of detection(LOD)of DropLab matched that of the conventional ELISA in a microwell *** brings MDM one step closer to being a viable medical technology that is ready for real-world POCT applications.

关键词： POCT testing automated

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Electronic exoneuron based on liquid metal for the quantitative sensing of the augmented somatosensory system

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Microsystems & nanoengineering 2023年第5期9卷 113-125页

作者： Jin Shang Lixue Tang Kaiqi Guo Shuaijian Yang Jinhao Cheng Jiabin Dou Rong Yang Mingming Zhang Xingyu Jiang Shenzhen Key Laboratory of Smart Healthcare Engineering Guangdong Provincial Key Laboratory of Advanced BiomaterialsDepartment of Biomedical EngineeringSouthern University of Science and TechnologyNo.1088Xueyuan Rd.Nanshan DistrictShenzhenGuangdong 518055P.R.China CAS Center for Excellence in nanoscience Center of Materials Science and Optoelectronics EngineeringNational Center for Nanoscience and TechnologyUniversity of Chinese Academy of SciencesBeijing 100190P.R.China Sino-Danish Center for Education and Research Sino-Danish CollegeUniversity of Chinese Academy of SciencesBeijing 100190P.R.China school of Biomedical Engineering Capital Medical UniversityNo.10 XitoutiaoYou An Men WaiBeijing 100069China school of Biomedical Sciences Faculty of Biological SciencesUniversity of LeedsLeeds LS29JTUK

The increasing demands in augmented somatosensory have promoted quantitative sensing to be an emerging need for athletic training/performance evaluation and physical *** for the somatosensory system in the human body can capture the information of movements in time but only *** work presents an electronic Exo-neuron(EEN)that can spread throughout the limbs for realizing augmented somatosensory by recording both muscular activity and joint motion quantitatively without site constraints or drift instability,even in strenuous *** based on low-cost liquid metal and clinically used adhesive elastomer,the EEN could be easily fabricated in large areas for *** is thin(~120μm),soft,stretchable(>500%),and conformal and further shows wide applications in sports,rehabilitation,health care,and entertainment.

关键词： system recording liquid

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原位透射解析增强界面实现“厚密”硅负极

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Science Bulletin 2020年第18期65卷 1563-1569,M0004页

作者：韩俊伟汤代明孔德斌陈凡奇肖菁赵子云潘思远吴士超杨全红 Nanoyang Group State Key Laboratory of Chemical EngineeringSchool of Chemical Engineering and TechnologyCollaborative Innovation Center of Chemical Science and Engineering(Tianjin)Tianjin UniversityTianjin 300350China International Center for Materials Nanoarchitectonics(WPI-MANA) National Institute for Materials Science(NIMS)Namiki 1-1Tsukubalbaraki 305-0044Japan CAS Key Laboratory of Nanosystem and Hierarchical Fabrication CAS Center for Excellence in NanoscienceNational Center for Nanoscience and TechnologyBeijing 100190China joint school of National University of Singapore and Tianjin University International Campus of Tianjin UniversityBinhai New CityFuzhou 350207China

为提高锂离子电池的体积能量密度,电极的密度和厚度需要尽可能提高,以降低非活性组分在整个电池中的体积占比.但是,电极密度与厚度的增加,对电极,特别是对高容量硅负极循环过程中的力学稳定性提出了巨大的挑战.本工作针对硅碳复合电极材... 详细信息

为提高锂离子电池的体积能量密度,电极的密度和厚度需要尽可能提高,以降低非活性组分在整个电池中的体积占比.但是,电极密度与厚度的增加,对电极,特别是对高容量硅负极循环过程中的力学稳定性提出了巨大的挑战.本工作针对硅碳复合电极材料,通过碳/硅界面的强化设计,实现"厚密"硅负极构建.利用可流动的硫模板法实现碳网络可控收缩,为硅纳米颗粒的定制限域碳笼,并辅以聚多巴胺界面修饰,以提高硅碳界面结合作用,最终获得增强界面的碳笼缓冲结构.进一步地,基于原位透射电子显微镜技术的平面压缩、垂直剪切等力学测试,以及力学-电化学耦合表征等解析硅碳增强界面对嵌锂膨胀硅纳米颗粒所发挥的力学缓冲作用.最终,基于此硅碳复合材料,获得具有高体积比容量和高面容量、稳定循环的"厚密"硅负极.

关键词： Lithium-ion battery Silicon anode Interface stability In situ TEM Dense and thick electrodes

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