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Tunable Carr-type temperature dependence of uniaxial magnetocrystalline anisotropy in Fe-deficient Fe3−xGeTe2

Physical Review B 2025年第14期111卷 144425-144425页

作者： Jiawei Liu Liang Zhou Rui Liang Shuilin Li Ziying Li Li Zhang Zishuang Li Haozhe Wang Yi Huang Ronghua Liu Nujiang Tang National Laboratory of Solid State Microstructures Collaborative Innovation Center of Advanced Microstructures and Jiangsu Provincial Key Laboratory for Nanotechnology Nanjing University Nanjing 210093 China National Key Laboratory of Spintronics Nanjing University Suzhou 215163 China

The anomalous temperature dependence of uniaxial magnetocrystalline anisotropy constant Ku1(T) recently discovered in van der Waals (vdW) ferromagnet Fe3GeTe2, which is favorable for spintronic application, provides a case of Carr-type Ku1(T). Here, we report that by varying the content of Fe deficiency x, the Carr-type Ku1(T) in vdW ferromagnet Fe3−xGeTe2 can be effectively tuned. Although the scale of Ku1(T) is overall reduced with increasing x as expected, the increment in Ku1 relative to the ground-state one distinctly increases and the maximum point shifts to higher temperature. Strikingly, a giant relative increment in Ku1 up to 180% is observed at elevated temperature of about 0.4TC in an Fe-poor sample with x=0.21. The considerably enhanced localized nature and altered lattice symmetry in an Fe-poor sample suggested by further analyses are proposed to be responsible for our experimental observations. Our findings provide an effective way and insight for optimizing the promising Carr-type Ku1(T) for advancing spintronic application.

关键词： Van der Waals forces

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Multi-particles micromanipulation in focused sound field for single-beam acoustic tweezer

Multi-particles micromanipulation in focused sound field for...

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2024 International Conference on Mechatronic Engineering and Artificial Intelligence, MEAI 2024

作者： Zhu, Guolong Li, Bo Xu, Junlei Zhang, Lue Sun, Lining School of Mechanical and Electric Engineering Jiangsu Provincial Key Laboratory of Advanced Robotics Soochow University Suzhou215137 China

ISBN: (纸本)9781510689176

In this paper, for the prediction of sound field distribution, a spherical piezoelectric transducer is designed for focused acoustic field according to piezoelectricity equation and vibration analysis. Based on the predicted acoustic fields distribution, the Acoustic Radiation Force(ARF) of the particles with different material and different sizes are obtained, according to a perturbation expansion of the acoustic fields in fluid. Besides, the trapping and micro-manipulation of particles are realized perpendicular to the acoustic axis through experimental according to the predicted ARF. © 2025 SPIE.

关键词： Acoustic fields

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Manipulating charge density wave state in kagome compound RbV_(3)Sb_(5)

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Chinese Physics B 2023年第9期32卷 391-395页

作者：孟雨欣薛成龙窦立国赵伟民汪琪玮徐永杰刘祥麒夏威郭艳峰李绍春 National Laboratory of Solid State Microstructures School of PhysicsNanjing UniversityNanjing 210093China Collaborative Innovation Center of Advanced Microstructures Nanjing UniversityNanjing 210093China School of Physical Science and Technology Shanghai Tech UniversityShanghai 201210China Shanghai Tech Laboratory for Topological Physics Shanghai 201210China Jiangsu Provincial Key Laboratory for Nanotechnology Nanjing UniversityNanjing 210093China Hefei National Laboratory Hefei 230088China

Owing to the unique electronic structure,kagome materials AV_(3)Sb_(5)(A=K,Rb,Cs)provide a fertile platform of quantum phenomena such as the strongly correlated state and topological Dirac *** is well known that RbV_(3)Sb_(5)exhibits a 2×2 unconventional charge density wave(CDW)state at low temperature,and the mechanism is ***,by using scanning tunneling microscopy/spectroscopy(STM/STS),we successfully manipulated the CDW state in the Sb plane of RbV_(3)Sb_(5),and realized a new3(1/2)×3(1/2)modulation together with the ubiquitous 2×2 period in the CDW state of RbV_(3)Sb_(5).This work provides a new understanding of the collective quantum ground states in the kagome materials.

关键词： kagome material charge density wave scanning tunneling microscopy

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High Performance Soft Electrochemical Actuators Based on Hierarchical Conductive Polymer Ionogels

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Journal of Bionic Engineering 2023年第6期20卷 2755-2763页

作者： Hongwei Hu Shengtao Zhang Yan Li Xinghao Hu Lin Xu Aixin Feng Guanggui Cheng Jianning Ding Zhejiang Provincial Key Laboratory of Laser Processing Robotics College of Mechanical and Electrical EngineeringWenzhou UniversityWenzhou325035China Institute of Intelligent Flexible Mechatronics Jiangsu UniversityZhenjiang212013China School of Mechanical Engineering Jiangsu University of Science and TechnologyZhenjiang212100China School of Mechanical Engineering Yangzhou UniversityYangzhou225127China Jiangsu Collaborative Innovation Center of Photovoltaic Science and Engineering Changzhou UniversityChangzhou213164China Ruian Graduate School of Wenzhou University Ruian325207ZhejiangChina

Electrochemical actuators based on conductive polymers are emerging as a strong competitive in the field of soft actuators because of their intrinsically conformable/elastic nature,low cost,low operating voltage and air-working *** development has shown that adding electroactive materials,such as CNT and graphene,can improve their actuation *** the complex material systems used,their output strains(one of the key factors)are generally lower than 1%,which limited further applications of them in multiple ***,we report soft electrochemical actuators based on conductive polymer ionogels by embedding polyaniline particles between the PEDOT:PSS *** show that such a hierarchical structure not only leads to a high conductivity(1250 S/cm)but also improved electrochemical *** a low operating voltage of 1 V,the maximum strain of these soft actuators reaches an exceptional value of 1.5%,with a high blocking force of 1.3 *** these high-performance electrochemical actuators,we demonstrate soft grippers for manipulating object and a bionic flower stimulated by an electrical *** work sets an important step towards enabling the enhanced performance of electrochemical actuators based on conductive polymers with designed microstructures.

关键词： Conductive polymer Soft actuator Polyaniline PEDOT:PSS Bioinspired actuator

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Research on Fast Shaft Hole Assembly Technology Based on 2D Point Cloud Matching Shape Recognition Method by Industrial Robot

Research on Fast Shaft Hole Assembly Technology Based on 2D ...

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Control Engineering and robotics (ISCER), International Symposium on

作者： Xian Wu Lei Lu Chengyun Yang Wenjie Li Yinan Wang Haoran Zhao Lei Zhang Jiangsu Provincial Key Laboratory of Advanced Robotics&Collaborative Innovation Center of Suzhou Nano Science and Technology Soochow University Suzhou China

Precise and rapid shaft hole assembly is important for improving equipment performance and assembly efficiency. As the variety of parts and shapes, the accuracy and efficiency of manual assembly are limited. In this paper, a shaft hole assembly method by using image recognition algorithm and robot is proposed. In the image recognition process, a shape recognition method based on 2D point cloud matching is presented, and combined with robot to realize grasping and assembly movement. In order to improve the recognition accuracy and reduce the real-time computational complexity, the method with binarization, Gauss filtering and shape recognition are provided to process the image obtained from camera. The experiment results show that the proposed image recognition could effectively identify part shape and complete the assembly process accurately, i.e., the method could effectively improve the efficiency and accuracy of shaft hole assembly.

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A Contactless Magnetic Frequency-Boosting Mechanism for Wind Energy Harvesting

A Contactless Magnetic Frequency-Boosting Mechanism for Wind...

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Micro and Nanotechnology for Power Generation and Energy Conversion Applications (PowerMEMS)

作者： Yunfei Li Manjuan Huang Tianyi Tang Heng Zhao Lining Sun Huicong Liu State Key Laboratory of Robotics and System Harbin Institute of Technology (HIT) CHINA School of Mechanical and Electric Engineering Jiangsu Provincial Key Laboratory of Advanced Robotics Soochow University CHINA

ISBN: (数字)9798350380200

ISBN: (纸本)9798350380217

This paper presents a non-contact magnetic frequency-boosting wind energy harvester suitable for low wind speed environments, designed to power various IoT sensors. The device comprises a driving component, a driven component, and a stator component. These components work together to convert low-speed rotational motion caused by wind into high-speed rotational motion, thereby achieving high-power electromagnetic energy output. Performance tests have shown that the output voltage increases with wind speed, reaching a peak voltage of 27V and a peak power of 1.6W at a wind speed of 10 m/s. The device has successfully powered LED bulbs and Bluetooth sensors, demonstrating its practicality for real-time environmental monitoring applications.

关键词： Temperature sensors Wind energy Wind speed Magnetic sensors Voltage Stators Sensor systems Environmental monitoring Electromagnetics Power generation

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Wearable multichannel pulse condition monitoring system based on flexible pressure sensor arrays

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Microsystems & Nanoengineering 2022年第1期8卷 249-258页

作者： Jie Wang Yirun Zhu Zhiyong Wu Yunlin Zhang Jian Lin Tao Chen Huicong Liu Fengxia Wang Lining Sun Jiangsu Provincial Key Laboratory of Advanced Robotics School of Mechanical and Electric EngineeringSoochow UniversitySuzhou 215123China Micro Nano System Research Center Key Laboratory of Advanced Transducers and Intelligent Control System of Ministry of Education and Shanxi Province&College of Information EngineeringTaiyuan University of TechnologyTaiyuan 030024China Suzhou Institute of Nano-tech and Nanobionics Chinese Academy of SciencesSuzhou 215123China

Pulse diagnosis is an irreplaceable part of traditional Chinese medical ***,application of the traditional pulse monitoring method was restricted in the modernization of Chinese medical science since it was difficult to capture real signals and integrate obscure feelings with a modern data ***,a novel multichannel pulse monitoring platform based on traditional Chinese medical science pulse theory and wearable electronics was *** pulse sensing platform simultaneously detected pulse conditions at three pulse positions(Chi,Cun,and Guan).These signals were fitted to smooth surfaces to enable 3-dimensional pulse mapping,which vividly revealed the shape of the pulse length and width and compensated for the shortcomings of traditional single-point pulse ***,the pulse sensing system could measure the pulse signals from different individuals with different conditions and distinguish the differences in pulse *** addition,this system could provide full information on the temporal and spatial dimensions of a person’s pulse waveform,which is similar to the true feelings of doctors’*** innovative,cost-effective,easily designed pulse monitoring platform based on flexible pressure sensor arrays may provide novel applications in modernization of Chinese medical science or intelligent health care.

关键词： multichannel system replace

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Cam-Driven Frequency Up-Conversion Mechanism For Kinetic Energy Harvesting

Cam-Driven Frequency Up-Conversion Mechanism For Kinetic Ene...

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Micro and Nanotechnology for Power Generation and Energy Conversion Applications (PowerMEMS)

作者： Heng Zhao Tianyi Tang Yunfei Li Mingqi Mei Huicong Liu School of Mechanical and Electrical Engineering Jiangsu Provincial Key Laboratory of Advanced Robotics Soochow University Suzhou CHINA State Key Laboratory of Robotics and System Harbin Institute of Technology Harbin CHINA

ISBN: (数字)9798350380200

ISBN: (纸本)9798350380217

This paper proposes an ocean wave energy harvester (WEH) with a cam-driven frequency up-conversion mechanism. It utilizes a planar pendulum structure to achieve motion response to ultra-low-frequency wave excitation and then converts the mechanical energy of the pendulum into high-frequency and high-power electrical energy output through the cam-driven frequency upconversion mechanism. WEH’s superior design enables high-power output even under excitation below 1 Hz. At the excitation frequency of 0.75 Hz and resistance load of $20 \Omega$, the maximum power output can reach 461.4 mW. Due to its high output power, the WEH can be integrated into the ocean observation buoy to power the sensors, thereby enabling long-term, unattended operation of the buoy in remote offshore areas.

关键词： Temperature sensors Resistance Ocean waves Frequency conversion Sensor systems Sensors Power systems Wave energy conversion Power generation Ocean temperature

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A Wave Energy Harvester With Vertical Pendulum And Mag-Boost Mechanism

A Wave Energy Harvester With Vertical Pendulum And Mag-Boost...

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Micro and Nanotechnology for Power Generation and Energy Conversion Applications (PowerMEMS)

作者： Tianyi Tang Yunfei Li Heng Zhao Lining Sun Huicong Liu State Key Laboratory of Robotics and System Harbin Institute of Technology Harbin CHINA School of Mechanical and Electrical Engineering Jiangsu Provincial Key Laboratory of Advanced Robotics Soochow University Suzhou CHINA

ISBN: (数字)9798350380200

ISBN: (纸本)9798350380217

This paper presents an ultra-low-frequency and high-power wave energy harvester (WEH). It utilizes a vertical pendulum structure to achieve motion response to ultra-low-frequency wave excitation and then converts the mechanical energy of the pendulum into high-frequency and high-power electrical energy output through the MagBoost Mechanism. The design of WEH ensures stable output even under excitation conditions below 1 Hz. At the excitation frequency of 1.4 Hz and resistance load of $20 \Omega$, the maximum power output can reach 1.16 W with a power density of $0.54 \mathrm{~mW} / \mathrm{cm}^{3}$. The high energy density allows stable power supplementation for ocean observation buoy within a limited volume, thereby enabling long-term, unattended operation of the buoy in remote offshore areas.

关键词： Resistance Power system measurements Density measurement Oceans Frequency conversion Sensor systems Sensors Mechanical energy Wave energy conversion Power generation

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Super-resolution imaging of low-contrast periodic nanoparticle arrays by microsphere-assisted microscopy

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Chinese Physics B 2021年第4期30卷 193-197页

作者： Qin-Fang Shi Song-Lin Yang Yu-Rong Cao Xiao-Qing Wang Tao Chen Yong-Hong Ye Department of Physics Nanjing Normal UniversityNanjing 210023China Advanced Photonics Center Southeast UniversityNanjing 210096China Jiangsu Provincial Key Laboratory of Advanced Robotics Soochow UniversitySuzhou 215123China

We use the label-free microsphere-assisted microscopy to image low-contrast hexagonally close-packed polystyrene nanoparticle arrays with diameters of 300 and 250 *** a nanoparticle array is directly placed on a glass slide,it cannot be *** a 30-nm-thick Ag film is deposited on the surface of a nanoparticle array,the nanoparticle array with nanoparticle diameters of 300 and 250 nm can be *** addition,the Talbot effect of the 300-nm-diameter nanoparticle array is also *** a nanoparticle sample is assembled on a glass slide deposited with a 30-nm-thick Ag film,an array of 300-nm-diameter nanoparticles can be *** propose that in microsphere-assisted microscopy imaging,the resolution can be improved by the excitation of surface plasmon polaritons(SPPs) on the sample surface or at the sample/substrate interface,and a higher near-field intensity due to the excited SPPs would benefit the resolution *** study of label-free super-resolution imaging of low-contrast objects will promote the applications of microsphere-assisted microscopy in life sciences.

关键词： super-resolution microsphere optical microscopy surface plasmon polariton

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