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fiber-tip polymer clamped-beam probe for high-sensitivity nanoforce measurements

Light(Science & Applications) 2021年第9期10卷 1768-1779页

作者： Mengqiang Zou Changrui Liao Shen Liu Cong Xiong Cong Zhao Jinlai Zhao Zongsong Gan Yanping Chen Kaiming Yang Dan Liu Ying Wang Yiping Wang Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education/GuangDong Province College of Physics and Optoelectronic EngineeringShenzhen UniversityShenzhen518060China Shenzhen Key Laboratory of Photonic Devices and Sensing Systems for Internet of Things Guangdong and Hong Kong Joint Research Centre for Optical Fibre SensorsShenzhen UniversityShenzhen518060China College of Materials Science and Engineering Shenzhen Key Laboratory of Polymer Science and TechnologyGuangdong Research Center for Interfacial Engineering of Functional MaterialsShenzhen518060China Wuhan National Laboratory for Optoelectronics(WNLO) Huazhong University of Science and Technology(HUST)Wuhan430074China Shenzhen Huazhong University of Science and Technology Research Institute ShenzhenGuangdong518057China

Micromanipulation and biological,material science,and medical applications often require to control or measure the forces asserted on small ***,we demonstrate for the first time the microprinting of a novel fiber-tip-polymer clamped-beam probe micro-force sensor for the examination of biological *** proposed sensor consists of two bases,a clamped beam,and a force-sensing probe,which were developed using a femtosecond-laser-induced two-photon polymerization(TPP)*** on the finite element method(FEM),the static performance of the structure was simulated to provide the basis for the structural design.A miniature all-fiber micro-force sensor of this type exhibited an ultrahigh force sensitivity of 1.51 nmμN−1,a detection limit of 54.9 nN,and an unambiguous sensor measurement range of~2.9 *** Young’s modulus of polydimethylsiloxane,a butterfly feeler,and human hair were successfully measured with the proposed *** the best of our knowledge,this fiber sensor has the smallest force-detection limit in direct contact mode reported to date,comparable to that of an atomic force microscope(AFM).This approach opens new avenues towards the realization of small-footprint AFMs that could be easily adapted for use in outside specialized *** such,we believe that this device will be beneficial for high-precision biomedical and material science examination,and the proposed fabrication method provides a new route for the next generation of research on complex fiber-integrated polymer devices.

关键词： fiber beam polymer

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fiber-shaped organic electrochemical transistors for biochemical detections with high sensitivity and stability

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Science China Chemistry 2020年第9期63卷 1281-1288页

作者： Xiaoying Wu Jianyou Feng Jue Deng Zhichang Cui Liyuan Wang Songlin Xie Chuanrui Chen Chengqiang Tang Zhengqi Han Hongbo Yu Xuemei Sun Huisheng Peng State Key Laboratory of Molecular Engineering of Polymers Department of Macromolecular Scienceand Laboratory of Advanced MaterialsFudan UniversityShanghai 200438China Vision Research Laboratory School of Life SciencesState Key Laboratory of Medical NeurobiologyCollaborative Innovation Centre for Brain ScienceFudan UniversityShanghai 200438China

Precise and continuous monitoring of biochemicals by biosensors assists to understand physiological functions for various diagnostics and therapeutic *** implanted biosensors,small size and flexibility are essential for minimizing tissue damage and achieving accurate ***,the active surface area of sensor decreases as the sensor becomes smaller,which will increase the impedance and decrease the signal to noise ratio,resulting in a poor detection *** advantages of local amplification effect,organic electrochemical transistors(OECTs)constitute promising candidates for high-sensitive ***,their detections in deep tissues are rarely ***,we report a family of implantable,fiber-shaped all-in-one OECTs based on carbon nanotube fibers for versatile biochemical detection including H2O2,glucose,dopamine and *** fiber-shaped OECTs demonstrated high sensitivity,dynamical stability in physiological environment and antiinterference *** implantation in mouse brain,7-day dopamine monitoring in vivo was realized for the first *** fiber-shaped OECTs could be great additions to the"life science"tool box and represent promising avenue for biomedical monitoring.

关键词： carbon nanotube fiber flexible organic electrochemical transistor

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fiber-Optically Triggered Four Parallel GaAs Photoconductive Semiconductor Switches

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Plasma Science and Technology 2011年第6期13卷 747-750页

作者：施卫薜红李宁陈素果代瑞娟 Applied Physics Department Xi'an University of Technology State Key Laboratory of Electrical Insulation and Power Equipment Xi'an Jiaotong University

Four parallel GaAs photoconductive semiconductor switches （PCSSs） were triggered simultaneously by four 1064 nm laser beams. The transient characteristics of four linear electrical pulses were investigated. When the energy of four laser beams were 16.4 m J, 15.6 m J, 15.3 m J, and 13.7 m J, respectively, four stable electrical pulses of about 25 ns width and 10 ns rise time were obtained at the same bias voltage of 8 kV. The maximum switching voltage amplitude was 3.8 kV. With the triggering pulse energy and bias voltage kept constant, the three GaAs PCSSs were triggered at 10 Hz laser pulse. The method of synchronization calculation was given, and the synchronization of four parallel GaAs PCSSs was calculated to be 79 ps. The influence of bias voltage and laser energy on the voltage amplitude of electrical pulse was analyzed. Furthermore, relationship between the synchronization and the jitter time was also discussed.

关键词： GaAs PCSS fiber linear mode electrical pulse synchronization

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fiber Nonlinearity Post-Compensation by Optical Phase Conjugation for 40Gb/s CO-OFDM Systems

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Chinese Physics Letters 2011年第6期28卷 164-167页

作者： QIAO Yao-Jun LIU Xue-Jun JI Yue-Feng Key Laboratory of Information Photonics and Optical Communications(Ministry of Education) Beijing University of Posts and TelecommunicationsBeijing 100876

fiber nonlinearity impairments in a 40-Gb/s coherent optical orthogonal frequency division multiplexing(CO-OFDM)system are post-compensated for by a new method of fiber nonlinearity post-compensation(FNPC).The FNPC located before the CO-OFDM receiver includes an optical phase conjugation(OPC)unit and a subsequent 80-km-high nonlinear fiber(HNLF)as a fiber nonlinearity *** OPC unit is based on a four wave mixing effect in a semiconductor optical *** fiber nonlinearity impairments in the transmission link are post-compensated for after OPC by transmission through the HNLF with a large nonlinearity *** results show that the nonlinear threshold(NLT)(for Q>10 dB)can be increased by about 2.5 dB and the maximum Q factor is increased by about 1.2 dB for the single−channel 40-Gb/s CO-OFDM system with periodic dispersion *** the 50-GHz channel spacing wavelength-division-multiplexing system,the NLT increases by 1.1 dB,equating to a 0.7 dB improvement for the maximum Q factor.

关键词： fiber amplifier nonlinearity

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fiber Grating Sensor with Enhanced Pressure and Temperature Sensitivity

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Chinese Physics Letters 2000年第2期17卷 115-116页

作者： LIU Yun-Qi GUO Zhuan-Yun LIU Zhi-Guo ZHAO Dong-Hui GE Chun-Feng DONG Xiao-Yi Institute of Modern Optics Nankai UniversityTianjin 300071

A technique is used to enhance the pressure and temperature sensitivity of a fiber Bragg grating *** grating is packaged by using polymer jacket,which exhibits no significant chirp due to the adoption of the special *** measured pressure and temperature sensitivity of the structured grating is 6.28×10^(-5)/MPa and5.18×10^(-5)/℃.The wavelength shift due to pressure and temperature can be enhanced about 31.5 times for pressure and 7.7 times for temperature.

关键词： technique temperature fiber

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fiber Optic Moiré Interferometer

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Chinese Physics Letters 1997年第9期14卷 675-677页

作者： YUAN Li-bo Department of Physics Harbin Engineering UniversityHarbin 150001

A novel fiber optic moiréinterferometer has been developed and demonstrated.A He-Ne laser and three high birefringence fibers were used to configurate a fiber optic *** moiréfringe patterns formed by the interferometer depend on the arrangement of three fiber *** experiment results and the intensity distribution function of the interference patterns are given.

关键词： interferometer fiber arrangement

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fiber-Optic Solution Concentration Sensor Based on a Pressure-Induced Long-Period Grating in a Composite Waveguide

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Chinese Physics Letters 2012年第9期29卷 73-76页

作者： SHI Sheng-Hui ZHOU Xiao-Jun ZHANG Zhi-Yao LAN Lan YIN Cong LIU Yong School of Opto-electronic Information University of Electronic Science and Technology of ChinaChengdu 610054 State Key Laboratory of Electronic Thin Films and Integrated Devices University of Electronic Science and Technology of ChinaChengdu 610054

A fiber-optic solution concentration sensor based on a pressure-induced long-period grating(LPG)in a composite optical waveguide is *** composite waveguide consists of a standard single-mode fiber with its coating stripped away,a teflon-cannula and the medium to be *** experiment has been carried out to measure the concentration of the sodium chloride(NaCl)*** results show that the central resonant wavelengths of the LPG shift towards shorter wavelengths when the concentration of the NaCl solution *** central resonant wavelength of the LP_(14) cladding mode exhibits a total blue shift of 4.13 nm in the NaCl solution concentration range of 0–25%,which corresponds to a sensing sensitivity of 0.17 nm/%.

关键词： waveguide fiber Waveguide

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Particle penetration in fiber filters

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Particuology 2018年第5期16卷 70-79页

作者： Norbert Riefler Martina Ulrich Marko Morshaiuser Udo Fritsching Process Engineering Institute of Materials ScienceBadgasteiner Strasse 328359BremenGermany Lydall Gutsche GmbH & Co.KG Hermann-Muth-Str.836039FuldaGermany Particles and Process Engineering University of BremenBibliothekstrasse 128359BremenGermany

Particle separation from gases is an important unit operation in manifold industrial applications,such as those conducted in environmental *** analysis of particle penetration and separation in fiber filters,standard dust particles (Al2O3)were loaded in the gas flow of a filter test facility and deposited within new and uncharged fiber *** loaded filters were analyzed by micro-computer tomography and scanning electron ***-dimensional tomograms of the samples show an exponential decay of the penetration depth of the *** dependency is confirmed by simulations conducted using the discrete element method coupled with computational fluid dynamics within unloaded and loaded fiber *** processes of particle separation at the fibers as well as the filtration efficiency and time-dependent filtering process are derived from the *** particle clustering in the filter medium and partial filter clogging are thus identified.

关键词： Particle filtration fiber filter X-ray microtomography Computational fluid dynamics-discrete element method coupling High-fidelity simulation Transient mesh morphing

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Quantitative phase imaging through an ultra-thin lensless fiber endoscope

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Light(Science & Applications) 2022年第8期11卷 1843-1852页

作者： Jiawei Sun Jiachen Wu Song Wu Ruchi Goswami Salvatore Girardo Liangcai Cao Jochen Guck Nektarios Koukourakis Juergen W.Czarske Laboratory of Measurement and Sensor System Technique(MST) TU DresdenHelmholtzstrasse 1801069DresdenGermany Competence Center for Biomedical Computational Laser Systems(BIOLAS) TU DresdenDresdenGermany State Key Laboratory of Precision Measurement Technology and Instruments Department of Precision InstrumentsTsinghua University100084BeijingChina Institute for Integrative Nanosciences IFW DresdenHelmholtzstraße 2001069DresdenGermany Max Planck Institute for the Science of Light&Max-Planck-Zentrum für Physik und Medizin 91058ErlangenGermany Cluster of Excellence Physics of Life TU DresdenDresdenGermany Institute of Applied Physics TU DresdenDresdenGermany

Quantitative phase imaging(QPI)is a label-free technique providing both morphology and quantitative biophysical information in ***,applying such a powerful technique to in vivo pathological diagnosis remains ***-core fiber bundles(MCFs)enable ultra-thin probes for in vivo imaging,but current MCF imaging techniques are limited to amplitude imaging *** demonstrate a computational lensless microendoscope that uses an ultra-thin bare MCF to perform quantitative phase imaging with microscale lateral resolution and nanoscale axial sensitivity of the optical path *** incident complex light field at the measurement side is precisely reconstructed from the far-field speckle pattern at the detection side,enabling digital refocusing in a multi-layer sample without any mechanical *** accuracy of the quantitative phase reconstruction is validated by imaging the phase target and hydrogel beads through the *** the proposed imaging modality,three-dimensional imaging of human cancer cells is achieved through the ultra-thin fiber endoscope,promising widespread clinical applications.

关键词： fiber phase thin

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Wet spinning of fiber-shaped flexible Zn-ion batteries toward wearable energy storage

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Journal of Energy Chemistry 2022年第8期31卷 192-200,I0006页

作者： Tingting Gao Guangyuan Yan Xin Yang Qing Yan Yankuan Tian Jianwei Song Faxue Li Xueli Wang Jianyong Yu Yiju Li Shaojun Guo Key Laboratory of Textile Science and Technology Ministry of EducationCollege of TextilesDonghua UniversityShanghai 201620China Innovation Center for Textile Science and Technology Donghua UniversityShanghai 201620China School of Materials Science and Engineering Peking UniversityBeijing 100871China State Key Laboratory for Strength and Vibration of Mechanical Structures School of Aerospace EngineeringXi’an Jiaotong UniversityXi’an 710049ShaanxiChina School of Biological and Chemical Engineering NingboTech UniversityNingbo 315100ZhejiangChina

High-performance flexible one-dimensional(1D)electrochemical energy storage devices are crucial for the applications of wearable *** much progress on various 1D energy storage devices has been made,challenges involving fabrication cost,scalability,and efficiency ***,a highperformance flexible all-fiber zinc-ion battery(ZIB)is fabricated using a low-cost,scalable,and efficient continuous wet-spinning *** composite inks containing cellulose nanofibers/carbon nanotubes(CNFs/CNTs)binary composite network and either manganese dioxide nanowires(MnO_(2) NWs)or commercial Zn powders are utilized to spinning fiber cathodes and anodes,***_(2) NWs and Zn powders are uniformly dispersed in the interpenetrated CNFs/CNTs fibrous network,leading to homogenous composite inks with an ideal shear-thinning *** obtained fiber electrodes demonstrate favorable uniformity and *** from the well-designed electrodes,the assembled flexible fiber-shaped ZIB delivers a high specific capacity of 281.5 m Ah g^(-1) at 0.25 A g^(-1) and displays excellent cycling stability over 400 ***,the wet-spun fiber-shaped ZIBs achieve ultrahigh gravimetric and volumetric energy densities of 47.3 Wh kg^(-1) and 131.3 m Wh cm^(-3),respectively,based on both cathode and anode and maintain favorable stability even after 4000 bending *** work offers a new concept design of 1D flexible ZIBs that can be potentially incorporated into commercial textiles for wearable and portable electronics.

关键词： Manufacturing Wet spinning Zn ion battery Nanocellulose fiber

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