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学者姓名:赵立波

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< Page ,Total 13 >
The Design and Analysis of a Novel Micro Force Sensor Based on Depletion Type Movable Gate Field Effect Transistor SCIE
期刊论文 | 2019 , 28 (2) , 298-310 | JOURNAL OF MICROELECTROMECHANICAL SYSTEMS
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Abstract :

A novel micro force sensor based on depletion type vertically movable gate array field effect transistor (VMGAFET) was developed with cross-axis decoupling structure and eight gate arrays. This novel sensor is able to detect ultra-low force and exhibit high measuring sensitivity. An accurate electrical model was then proposed and compared with a long channel model, which is better adopted in small-sized devices to predict the electrical performance of this sensor. We also developed a mechanical model for the micro force sensor. Finite element method simulations were conducted, and the results were in accordance with the theoretical ones. Then, a feasible fabrication process was illustrated for the proposed sensor. The measuring sensitivity and nonlinearity of the micro force sensor with the proposed structure and dimension parameters are 12.528 mu A/nN and <1.35%, respectively. These theoretical analyses provide insights into the design of depletion type VMAGFET-based sensor and other kinds of devices based on movable gate field effect transistor or with similar movable structures.

Keyword :

Ultra-low force sensor movable gate depletion type high measuring sensitivity field effect transistor

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GB/T 7714 Gao, Wendi , Jia, Chen , Jiang, Zhuangde et al. The Design and Analysis of a Novel Micro Force Sensor Based on Depletion Type Movable Gate Field Effect Transistor [J]. | JOURNAL OF MICROELECTROMECHANICAL SYSTEMS , 2019 , 28 (2) : 298-310 .
MLA Gao, Wendi et al. "The Design and Analysis of a Novel Micro Force Sensor Based on Depletion Type Movable Gate Field Effect Transistor" . | JOURNAL OF MICROELECTROMECHANICAL SYSTEMS 28 . 2 (2019) : 298-310 .
APA Gao, Wendi , Jia, Chen , Jiang, Zhuangde , Zhou, Xiangyang , Zhao, Libo , Sun, Dong . The Design and Analysis of a Novel Micro Force Sensor Based on Depletion Type Movable Gate Field Effect Transistor . | JOURNAL OF MICROELECTROMECHANICAL SYSTEMS , 2019 , 28 (2) , 298-310 .
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Subwavelength focusing and experimental detection of large-scale metallic multi-annular metasurfaces CPCI-S
会议论文 | 2019 , 11053 , 5 | 10th International Symposium on Precision Engineering Measurements and Instrumentation (ISPEMI)
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Abstract :

To realize a long working distance and high resolution focusing for diffraction optical element, the large-scale optical elements need to be employed. Based on the vectorial angular spectrum theory and genetic algorithm, a large-scale metallic multi-annular metasurface (MAM) was designed. The MAM realizes subwavelength focusing and has a main focal spot within the range of 0-140 mu m. The focal length is 113.5 mu m. Using electron beam lithography, the designed MAM was fabricated. The experimental setup was built. The intensity distribution of the main focal spot was experimentally obtained. The theoretical and experimental results have a good agreement, which show that the proposed method can be used to design the large-scale MAM.

Keyword :

Long working distance Electron beam lithography Vectorial angular spectrum theory Metallic multi-annular metasurface Sub-wavelength focusing

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GB/T 7714 Wang, Tong , Liu, Tao , Yang, Shuming et al. Subwavelength focusing and experimental detection of large-scale metallic multi-annular metasurfaces [C] . 2019 : 5 .
MLA Wang, Tong et al. "Subwavelength focusing and experimental detection of large-scale metallic multi-annular metasurfaces" . (2019) : 5 .
APA Wang, Tong , Liu, Tao , Yang, Shuming , Cheng, Biyao , Liu, Qiang , Liu, Kang . Subwavelength focusing and experimental detection of large-scale metallic multi-annular metasurfaces . (2019) : 5 .
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A novel three-dimensional spiral CoNi LDHs on Au@ErGO wire for high performance fiber supercapacitor electrodes EI Scopus SCIE
期刊论文 | 2019 , 236 , 728-731 | Materials Letters
WoS CC Cited Count: 1 SCOPUS Cited Count: 2
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Abstract :

© 2018 Elsevier B.V. This work demonstrates a novel three-dimensional (3D) spiral fiber electrode, fabricated by electrochemically reducing of graphene oxide (GO) on Au wire followed with electrodeposition of CoNi layered double hydroxides (LDHs). The advanced electrode possesses combined features of micro size, good flexibility, high specific capacitance, excellent rate capability, and long cycling life, making it promises great potential as effective energy sources to integrate with other devices for wearable electronics.

Keyword :

CoNi LDHs Electrodeposition Fiber supercapacitor Microstructure Nanocomposites Wearable electronics

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GB/T 7714 Luo, Guoxi , Siong Teh, Kwok , Xia, Yong et al. A novel three-dimensional spiral CoNi LDHs on Au@ErGO wire for high performance fiber supercapacitor electrodes [J]. | Materials Letters , 2019 , 236 : 728-731 .
MLA Luo, Guoxi et al. "A novel three-dimensional spiral CoNi LDHs on Au@ErGO wire for high performance fiber supercapacitor electrodes" . | Materials Letters 236 (2019) : 728-731 .
APA Luo, Guoxi , Siong Teh, Kwok , Xia, Yong , Luo, Yunyun , Li, Zhikang , Wang, Shubei et al. A novel three-dimensional spiral CoNi LDHs on Au@ErGO wire for high performance fiber supercapacitor electrodes . | Materials Letters , 2019 , 236 , 728-731 .
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A novel microsensor for measuring thermal conductivity of fluid based on three omega method. PubMed SCIE
期刊论文 | 2019 , 90 (1) , 015002 | The Review of scientific instruments
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A novel microsensor has been designed for the measurement of thermal conductivity of fluids based on the three omega (3ω) method. First, we theoretically analyzed the heat conduction using the 3ω method to demonstrate the mechanism of the microsensor to measure the thermal conductivity of a fluid. For the main structure of the microsensor, a heater was supported by the thin dielectric layers. In order to obtain the optimal parameters, we used the finite element method to simulate the working condition of the microsensor. In the simulation model, the effects of the thicknesses of the heater and dielectric layers on the thermal conductivity λ of the fluid were analyzed. The simulation results confirmed the validity and accuracy of conventional analytical calculations. Based on the simulation and theoretical calculation, a microsensor was optimally designed and fabricated to measure the thermal conductivity of fluids. Experimental data are consistent with those reported in the literature and demonstrate that the proposed sensor is effective for measuring thermal conductivity of fluids, including conductive ones.

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GB/T 7714 Zhao Libo , Luo Yunyun , Huang Xiangxiang et al. A novel microsensor for measuring thermal conductivity of fluid based on three omega method. [J]. | The Review of scientific instruments , 2019 , 90 (1) : 015002 .
MLA Zhao Libo et al. "A novel microsensor for measuring thermal conductivity of fluid based on three omega method." . | The Review of scientific instruments 90 . 1 (2019) : 015002 .
APA Zhao Libo , Luo Yunyun , Huang Xiangxiang , Zhou Xiangyang , -Hebibul Rahman , Ding Jianjun et al. A novel microsensor for measuring thermal conductivity of fluid based on three omega method. . | The Review of scientific instruments , 2019 , 90 (1) , 015002 .
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Chemically engineered multiferroic morphotropic phase boundary in BiFeO3-based single phase multiferroics SCIE
期刊论文 | 2019 , 125 (4) , 10 | JOURNAL OF APPLIED PHYSICS
WoS CC Cited Count: 1
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Abstract :

As the reach points of different phases with complex structural features, a morphotropic phase boundary (MPB) in ferroelectric and ferromagnetic solid solutions can significantly enhance the piezoelectric performance and magnetostrictive response, respectively. Recently, the phase-change functional responses related to the multiferroic MPB are proposed to be a promising way to enhance the magnetoelectric coupling in BiFeO3-based single phase multiferroics. In this work, we verify the tunable magnetic ordering and the construction of the multiferroic MPB by engineering the chemical concentrations of the ferroelectric/nonmagnetic PbTiO3 end in the (1 - x) Bi0.9Dy0.1FeO3-xPbTiO3 binary solid solution ceramic system. Based on the results obtained in this work and reported in the literature, the structure-ferroic properties phase diagram of the BiFeO3-DyFeO3-PbTiO3 ternary system is established, where a compositional region with coexisting ferroelectric polarization and ferromagnetic moment is found. More importantly, a multiferroic MPB line separating two chemical regions with distinct crystal structures and ferroic orderings is discovered in the phase diagram. The phase changing nature of MPB compositions with temperature and compositions is investigated from room temperature to high temperature paraelectric phase. This work could provide a promising system to explore the highly desired colossal effects on magnetoelectric coupling in single phase multiferroics by phase-change functional responses. Published under license by AIP Publishing.

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GB/T 7714 Zhuang, Jian , Lu, Jinming , Zhang, Nan et al. Chemically engineered multiferroic morphotropic phase boundary in BiFeO3-based single phase multiferroics [J]. | JOURNAL OF APPLIED PHYSICS , 2019 , 125 (4) : 10 .
MLA Zhuang, Jian et al. "Chemically engineered multiferroic morphotropic phase boundary in BiFeO3-based single phase multiferroics" . | JOURNAL OF APPLIED PHYSICS 125 . 4 (2019) : 10 .
APA Zhuang, Jian , Lu, Jinming , Zhang, Nan , Zhang, Jie , Bokov, Alexei A. , Yang, Shuming et al. Chemically engineered multiferroic morphotropic phase boundary in BiFeO3-based single phase multiferroics . | JOURNAL OF APPLIED PHYSICS , 2019 , 125 (4) , 10 .
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Optimizing electrospinning-hydrothermal hybrid process based on Taguchi method for modulation of point defects in ZnO micro/nano arrays towards photoelectronic application EI SCIE
期刊论文 | 2019 , 779 , 167-174 | Journal of Alloys and Compounds
WoS CC Cited Count: 1
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Abstract :

Unlike previous work generally adopting high temperature annealing (≥500 °C) to suppress defects in hydrothermal grown ZnO, this work suppressed ZnO defects by optimizing overall process parameters of low temperature electrospinning-hydrothermal hybrid process (≤300 °C) with Taguchi method and Analysis of Variance (ANOVA). Sum ratio of defect peaks to eigen peaks (SRDE) in room-temperature photoluminescence (PL) spectrum was proposed to evaluate defect conditions in 27 experiments (L27 (38)). With the optimal process, good crystal quality (SRDE = 0.31) was achieved at low temperature (200 °C), of which the SRDE decreased by 68.04% compared with the initial counterpart. Then confirmation experiment was conducted to validate the selected levels, and results of signal-to-noise ratio (SNR) showed good agreement with the predicted ones. Besides, the response time and recovery time of the ZnO photodetectors with optimal process were decreased by 72.5% and 79.3%, respectively, compared with the initial ones. This method can also be used to fabricate ZnO materials with other wanted defect features. © 2018

Keyword :

Crystal qualities High-temperature annealing Hybrid process Low temperatures Low-temperature electrospinning Micro/nano Overall process Room temperature photoluminescence spectrums

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GB/T 7714 Xia, Yong , Zhao, Libo , Luo, Yunyun et al. Optimizing electrospinning-hydrothermal hybrid process based on Taguchi method for modulation of point defects in ZnO micro/nano arrays towards photoelectronic application [J]. | Journal of Alloys and Compounds , 2019 , 779 : 167-174 .
MLA Xia, Yong et al. "Optimizing electrospinning-hydrothermal hybrid process based on Taguchi method for modulation of point defects in ZnO micro/nano arrays towards photoelectronic application" . | Journal of Alloys and Compounds 779 (2019) : 167-174 .
APA Xia, Yong , Zhao, Libo , Luo, Yunyun , Hebibul, Rahman , Wang, Jiuhong , Li, Lei et al. Optimizing electrospinning-hydrothermal hybrid process based on Taguchi method for modulation of point defects in ZnO micro/nano arrays towards photoelectronic application . | Journal of Alloys and Compounds , 2019 , 779 , 167-174 .
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IMPACT EXPERIMENT ANALYSIS OF MEMS ULTRA-HIGH G PIEZORESISTIVE SHOCK ACCELEROMETER EI CPCI-S Scopus
会议论文 | 2018 , 964-967 | 31st IEEE International Conference on Micro Electro Mechanical Systems (MEMS)
WoS CC Cited Count: 1
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Abstract :

A novel ultra-high g shock micro accelerometer with four self-supporting piezoresistive micro beams was proposed to simultaneously enhance the sensor performance of sensitivity and frequency response. The finite element method (FEM) simulations indicated that the pure axial deformations could occur on self-supporting piezoresistive micro beams via optimizing structure dimensions. And the average stress distribution in piezoresistive beams was 81.5 MPa, the natural frequency of sensor was about 505.00 kHz. To verify the sensitivity and natural frequency of fabricated shock accelerometer, impact tests were carried out using Hopkinson pressure bar under impact loads of 100,000 g. The results were obtained in the form of response curves of a shock signal. Then, the average sensitivity was calculated as 1.586 mu V/g/3V, and the natural frequency was obtained as 445 kHz by fast Fourier transform. The experimental results agreed well with the FEM simulations except for a slight mismatch in natural frequency which was probably resulted from the errors of device fabrication and package processes. The experiment results reliably demonstrate that the proposed shock accelerometer, with high natural frequency and high sensitivity, is capable of measuring ultra-high g loading shock.

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GB/T 7714 Jia, Chen , Zhao, Libo , Jiang, Weile et al. IMPACT EXPERIMENT ANALYSIS OF MEMS ULTRA-HIGH G PIEZORESISTIVE SHOCK ACCELEROMETER [C] . 2018 : 964-967 .
MLA Jia, Chen et al. "IMPACT EXPERIMENT ANALYSIS OF MEMS ULTRA-HIGH G PIEZORESISTIVE SHOCK ACCELEROMETER" . (2018) : 964-967 .
APA Jia, Chen , Zhao, Libo , Jiang, Weile , Liu, Xixiang , Yu, Mingzhi , Huang, Mimi et al. IMPACT EXPERIMENT ANALYSIS OF MEMS ULTRA-HIGH G PIEZORESISTIVE SHOCK ACCELEROMETER . (2018) : 964-967 .
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GIANT ENHANCEMENT ON RESPONSE-SPEED OF ELECTROSPUN-BASED UV PHOTODETECTOR VIA POLYDIMETHYLSILOXANE COATING EI CPCI-S Scopus
会议论文 | 2018 , 1028-1031 | 31st IEEE International Conference on Micro Electro Mechanical Systems (MEMS)
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Electrospun-based ZnO granular nanofibers (GNFs), with the granular feature which are able to modulate energy band along axises of the fibers, are regarded as great candidates to develop the UV photodetectors with high performance. However, when exposed to air, the oxygen absorption and desorption make the devices suffer from sluggish response. Here, via an easy and cost effective method of polydimethylsiloxane (PDMS) coating, the photo-response speed of electrospun-based ZnO GNFs photodetectors was enhanced by more than 10(4) times. The giant enhancement was attributed to both gas isolation and surface electron state passivation. The results exhibited an effective method to enhance response speed of electrospun-based GNFs photodetectors.

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GB/T 7714 Xia, Yong , Zhao, Libo , Lu, Dejiang et al. GIANT ENHANCEMENT ON RESPONSE-SPEED OF ELECTROSPUN-BASED UV PHOTODETECTOR VIA POLYDIMETHYLSILOXANE COATING [C] . 2018 : 1028-1031 .
MLA Xia, Yong et al. "GIANT ENHANCEMENT ON RESPONSE-SPEED OF ELECTROSPUN-BASED UV PHOTODETECTOR VIA POLYDIMETHYLSILOXANE COATING" . (2018) : 1028-1031 .
APA Xia, Yong , Zhao, Libo , Lu, Dejiang , Li, Lei , Luo, Yunyun , Luo, Guoxi et al. GIANT ENHANCEMENT ON RESPONSE-SPEED OF ELECTROSPUN-BASED UV PHOTODETECTOR VIA POLYDIMETHYLSILOXANE COATING . (2018) : 1028-1031 .
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EFFECT OF MOLECULAR WEIGHT AND CONCENTRATION ON GEL-SPUN UHMWPE FIBERS WITH POLYBUTENE AS A NEW SPIN SOLVENT EI CPCI-S Scopus
会议论文 | 2018 , 8 | ASME International Mechanical Engineering Congress and Exposition
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Ultrahigh molecular weight polyethylene (UHMWPE) fibers have been investigated for years to improve performance with gel spinning process for wide applications in industry. Various spin solvents have been attempted including paraffin oil, decahydronaphthalene (decalin), kerosene etc. However, more work still needs to be done because of environmental issues or long extraction process of the aforementioned solvents. Recently, polybutene was found to be an effective spin solvent for UHMWPE fibers, which is environmentally friendly and widely available on the market. Besides producing high strength fibers, compared to paraffin oil, polybutene can form a gel with UHMWPE showing stronger phase separation behavior at room temperature. Because of this property, more extraction solvents can be saved. It was also demonstrated with experiments that the extraction efficiency is higher than that of the gel fiber formed with paraffin oil. Thus, polybutene has high potential to be used in large-scale production of UHMWPE fibers, which deserves further study. In this work, polybutene with different molecular weight was used to form spin dopes with UHMWPE. The dope concentration for each type of polybutene was also varied to check the effect of molecular weight and dope concentration on fiber properties. Viscoelastic properties of the spin dopes were obtained with parallel plate rheometry while thermodynamic properties of the dopes were characterized with differential scanning calorimetry (DSC) and thermal gravitational analysis (TGA). With optimized processing conditions, high strength fibers were collected and the crystalline structure was examined with wide angel X-ray diffraction (WAXD). DSC and TGA data also provided support for the effect of molecular weight and concentration of polybutene. It can be found that stronger fibers are obtained with lower concentration spin dopes. The viscosity of the dopes and corresponding spinning conditions are significantly affected by molecular weight of polybutene. Extraction efficiency is affected by both molecular weight and dope concentration. To obtain cost-effective superstrong UHMWPE fibers, an optimized design is needed based on the molecular weight of polybutene and the spin dope concentration.

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GB/T 7714 Fang, Xudong , Jing, Weixuan , Zhao, Libo et al. EFFECT OF MOLECULAR WEIGHT AND CONCENTRATION ON GEL-SPUN UHMWPE FIBERS WITH POLYBUTENE AS A NEW SPIN SOLVENT [C] . 2018 : 8 .
MLA Fang, Xudong et al. "EFFECT OF MOLECULAR WEIGHT AND CONCENTRATION ON GEL-SPUN UHMWPE FIBERS WITH POLYBUTENE AS A NEW SPIN SOLVENT" . (2018) : 8 .
APA Fang, Xudong , Jing, Weixuan , Zhao, Libo , Zhao, Yulong , Jiang, Zhuangde . EFFECT OF MOLECULAR WEIGHT AND CONCENTRATION ON GEL-SPUN UHMWPE FIBERS WITH POLYBUTENE AS A NEW SPIN SOLVENT . (2018) : 8 .
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Nonsingular terminal sliding mode control for the ESO-based stabilized platform EI Scopus PKU
期刊论文 | 2018 , 39 (5) , 161-169 | Yi Qi Yi Biao Xue Bao/Chinese Journal of Scientific Instrument
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Abstract:This paper presents a composite control strategy which employs the nonsingular terminal sliding mode (NTSM) control based on extended state observer (ESO). The influence of the multi-source disturbances on the control performance of the inertially stabilized platform (ISP) for aerial mete sensing applications is effectively suppressed. The stability and tracing accuracy of the ISP are also improved. The high-precision remote sensing images are achieved. Firstly, the NTSM control strategy is adopted to restrain the multi-source disturbances, in which the disturbances are taken as a total disturbance. By designing and optimizing the control interface and the control law of the NTSM, the influences of the disturbances on the control performance are effectively decreased. Then, the ESO is used to solve the chattering problem in the sliding mode. By transmitting the observed state and sum of interferences to the NTSM controller, the control law is further optimized and the chattering disturbance is suppressed in real time. Finally, simulation and experimental evaluations are carried out, respectively. The results show that the proposed method can effectively improve the disturbance suppression ability and stability accuracy of the ISP. © 2018, Science Press. All right reserved.

Keyword :

Chattering Disturbance Extended state observer Inertial stabilization platform Non-singular terminal sliding modes

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GB/T 7714 Zhou, Xiangyang , Li, Lingling , Zhao, Libo . Nonsingular terminal sliding mode control for the ESO-based stabilized platform [J]. | Yi Qi Yi Biao Xue Bao/Chinese Journal of Scientific Instrument , 2018 , 39 (5) : 161-169 .
MLA Zhou, Xiangyang et al. "Nonsingular terminal sliding mode control for the ESO-based stabilized platform" . | Yi Qi Yi Biao Xue Bao/Chinese Journal of Scientific Instrument 39 . 5 (2018) : 161-169 .
APA Zhou, Xiangyang , Li, Lingling , Zhao, Libo . Nonsingular terminal sliding mode control for the ESO-based stabilized platform . | Yi Qi Yi Biao Xue Bao/Chinese Journal of Scientific Instrument , 2018 , 39 (5) , 161-169 .
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