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Introducing Spin Polarization into Mixed-Dimensional Van der Waals Heterostructures for High-Efficiency Visible-Light Photocatalysis

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Energy & Environmental Materials 2023年第5期6卷 192-200页

作者： Yong Wang Wei Xu Yu Zhang Chengxin Zeng Weining Zhang Lin Fu Mei Sun Yizhang Wu Jian Hao Wei Zhong Youwei Du Rusen Yang Academy of Advanced Interdisciplinary Research School of Advanced Materials and NanotechnologyXidian UniversityXi'an 710126China National Laboratory of Solid State Microstructures Collaborative Innovation Center of Advanced Microstructures and Jiangsu Provincial Key Laboratory for NanotechnologyNanjing UniversityNanjing 210093China Department of Physics Shaanxi University of Science and TechnologyXi'an 710021China Department of Physics State Key Laboratory of Surface PhysicsFudan UniversityShanghai 200433China State Key Laboratory of High-Efficiency Utilization of Coal and Green Chemical Engineering Ningxia UniversityYinchuan 750021China

The low separation efficiency of the photogenerated carrier and the poor activity of the surface redox reaction are the main barrier to further improvement of photocatalytic *** address these issues,introducing spin-polarized electrons in single-component photocatalytic materials emerged as a promising ***,the decreased redox ability of photocarriers in these materials becomes a new ***,we mitigate this challenge with a carbon nitride sheet(CNs)/graphene nanoribbon(GNR)composite material that has a van der Waals heterostructures(vdWHs)and spin-polarized electron *** results and theoretical calculations show that the heterostructure has a strong redox ability,high carrier-separation efficiency,and enhanced surface catalytic ***,the mixed-dimensional CNs/GNR vdWHs exhibit remarkable performance for H_(2)and O_(2)generation as well as CO_(2)production under visible-light irradiation without any *** spin-polarized vdWHs discovered in this study revealed a new type of photocatalytic materials and advanced the development of spintronics and photocatalysis.

关键词： DFT calculations spin polarization Van der Waals heterostructures visible-light photocatalysis

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Promoting effect of d-band center and in-situ precipitation strategy on sulfur evolution reaction

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Journal of Energy Chemistry 2025年第5期104卷 740-748页

作者： Jun Pu Yun Tan Jiasen Yin Zihan Shen Shoujie Liu Kai Zhang Lei Zhou Yagang Yao Key Laboratory of Functional Molecular Solids Ministry of EducationAnhui Provincial Engineering Laboratory for New-Energy Vehicle Battery Energy-Storage MaterialsCollege of Chemistry and Materials ScienceAnhui Normal UniversityWuhu 241002AnhuiChina National Laboratory of Solid State Microstructures College of Engineering and Applied SciencesJiangsu Key Laboratory of Artificial Functional MaterialsCollaborative Innovation Center of Advanced MicrostructuresNanjing UniversityNanjing 210093JiangsuChina State Key Laboratory of Multiphase Complex Systems Institute of Process EngineeringChinese Academy of SciencesBeijing 100190China School of Materials Science and Engineering Anhui UniversityHefei 230601AnhuiChina School of Energy and Power Engineering Jiangsu UniversityZhenjiang 212013JiangsuChina Department of Electrical Engineering Eindhoven University of TechnologyEindhoven MB 5600the Netherlands

The slow conversion of polyphase in lithium-sulfur(Li-S)batteries not only intensifies the shuttle effect of lithium polysulfides(LiPSs),but also causes the continuous accumulation of inactive sulfur species,resulting in rapid capacity attenuation and sluggish dynamic ***,the promoting effect of atomic interface stress on sulfur reaction was investigated via CoFe-CoFe_(2)O_(4)heterogeneous nanosheets with a cavity *** strain force induced by the in-situ precipitation of Co Fe bimetallic alloy in oxide matrix increased the d-band center,which was conducive to the interaction between catalyst and Li *** sulfur cathode based on this two-dimensional(2D)nanosheet design showed an extremely high capacity of 751 mAh g^(-1)at 4 *** with a sulfur loading of 5.55 mg cm^(-2),its area capacity was still as high as 7.15 mAh cm^(-2).Meanwhile,the enhanced stability greatly improved the practical potential of Li-S batteries.

关键词： 2D nanosheets In-situ precipitation Strain effect D-band center Li-S batteries

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Aerodynamic Performance of Bio-inspired 3D Corrugated Wings Learned from the Ladybird BeetleHindwing

Aerodynamic Performance of Bio-inspired 3D Corrugated Wings ...

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2023 Annual IEEE International Conference on Manipulation, Manufacturing and Measurement on the Nanoscale, 3M-NANO 2023

作者： Liu, Chao Wang, Kejun Wang, Qian Soochow University School of Mechanical and Electric Engineering Suzhou215123 China Soochow University Jiangsu Provincial Key Laboratory of Advanced Robotics Suzhou215123 China

ISBN: (纸本)9798350344486

Beetle hindwings have two specific features: the deployable hindwing and corrugation wing. In the low Reynolds numbers environment, the corrugated wing structure of insect wings proves to be essential for improving *** order to explore further whether flexible corrugated structure has a significant effect on aerodynamic effects. Two 3D corrugated wing models (3D-CW models) were designed with rigid and flexible properties, respectively. In this paper, based on ANSYS Fluent, the fluid-structure interaction method is used to solve the Navier-Stokes equations numerically. At a series of angles of attack, the flexible wing has better aerodynamics at angles of attack larger than 10°;the deformed leading edge can induce a stronger Leading edge vortex (LEV) than found at the rigid wing. © 2023 IEEE.

关键词： Navier Stokes equations

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Research on Material and Morphological Structure of Venus Flytrap Trigger Hair

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Journal of Bionic Engineering 2021年第5期18卷 1126-1136页

作者： Qian Wang Kun Xu Cheng Fan Lining Sun Lei Zhang Kejun Wang Jiangsu Provincial Key Laboratory of Advanced Robotics Soochow UniversitySuzhou 215021China Key Laboratory for Bionic Engineering(Ministry of Education) Jilin UniversityChangchun 130022China

Venus flytrap can sense the very small insects that touch its tactile receptors,known as trigger hairs,and thus capture prey to maintain its nutrient ***,there are few studies on the trigger hair and its morphological structure and material properties are not fully *** this study,the trigger hair is systematically characterized with the help of diff erent *** show that trigger hair is a special cantilever beam structure and it has a large longitudinal diameter ***,it is composed of a hair lever and a basal podium,and there is a notch near the hair *** crosssection of the trigger hair is approximately a honeycomb structure,which is composed of many *** to measure mechanical properties of trigger hair are introduced in this *** on the mechanical tests,trigger hair proved to be a variable stiff ness structure and shows a high sensitivity to the external *** features can provide supports for the understanding of the high-sensitivity sensing mechanism of trigger hairs from the perspective of structure and material,and off er inspirations for the development of high-performance tactile sensors.

关键词： Venus flytrap Morphological structure Mechanical properties Trigger hair Bioinspiration

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Design and Experiment of A Hybrid Wave Energy Harvester Based on Tapered Rollers 21

Design and Experiment of A Hybrid Wave Energy Harvester Base...

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21st International Conference on Micro and Nanotechnology for Power Generation and Energy Conversion Applications, PowerMEMS 2022

作者： Li, Yunfei Tang, Tianyi Fang, Yan Huang, Manjuan Hou, Cheng Liu, Huicong Sun, Lining State Key Laboratory of Robotics and System Harbin150001 China Soochow University School of Mechanical and Electric Engineering Jiangsu Provincial Key Laboratory of Advanced Robotics China

ISBN: (纸本)9781665493062

This paper presents a hybrid energy harvester based on tapered rollers with an electromagnetic generator (EMG) component and a triboelectric nanogenerator (TENG) component for ultra-low frequency wave energy harvesting. The chaotic pendulum is adjusted to adapt the wave excitation under different sea conditions, ensuring that the device achieves optimal output performance. At excitation frequency of 1Hz and the tilt angle of 60°, the open-circuit voltage peaks of 8.4 and 132 V can be achieved by the EMG and TENG, respectively, corresponding to the power outputs of 4.38 and 0.078 mW, respectively. It was demonstrated that the device can easily light up over 360 red light-emitting diodes. © 2022 IEEE.

关键词： Wave energy conversion

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A piezoresistive-based 3-axial MEMS tactile sensor and integrated surgical forceps for gastrointestinal endoscopic minimally invasive surgery

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Microsystems & Nanoengineering 2024年第5期10卷 71-83页

作者： Cheng Hou Huxin Gao Xiaoxiao Yang Guangming Xue Xiuli Zuo Yanqing Li Dongsheng Li Bo Lu Hongliang Ren Huicong Liu Lining Sun School of Mechanical and Electrical Engineering Jiangsu Provincial Key Laboratory of Advanced RoboticsSoochow UniversitySuzhouChina Faculty of Mechanical and Electrical Engineering Kunming University of Science and TechnologyJingming South RoadKunmingChina Yunnan Key Laboratory of Intelligent Control and Application KunmingChina Department of Electronic Engineering The Chinese University of Hong Kong(CUHK)Hong KongChina. Department of Gastroenterology Qilu HospitalShandong UniversityJinanShandongChina

In robotic-assisted surgery(RAS),traditional surgical instruments without sensing capability cannot perceive accurate operational forces during the task,and such drawbacks can be largely intensified when sophisticated tasks involving flexible and slender arms with small end-effectors,such as in gastrointestinal endoscopic surgery(GES).In this study,we propose a microelectromechanical system(MEMS)piezoresistive 3-axial tactile sensor for GES forceps,which can intuitively provide surgeons with online force feedback during robotic *** MEMS fabrication process facilitates sensor chips with miniaturized *** fully encapsulated tactile sensors can be effortlessly integrated into miniature GES forceps,which feature a slender diameter of just 3.5 mm and undergo meticulous calibration procedures via the least squares *** experiments,the sensor's ability to accurately measure directional forces up to 1.2 N in the Z axis was validated,demonstrating an average relative error of only 1.18%compared with the full-scale *** results indicate that this tactile sensor can provide effective 3-axial force sensing during surgical operations,such as grasping and pulling,and in ex vivo testing with a porcine *** compact size,high precision,and integrability of the sensor establish solid foundations for clinical application in the operating theater.

关键词： axial surgery intensified

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Peculiar RKKY behavior involving electron transfer effect in sp3 semi-ionic F-doped graphene metal

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Physical Review B 2024年第14期110卷 144417页

作者： Shuilin Li Hongzhe Pan Jiawei Liu Ziying Li Nujiang Tang National Laboratory of Solid State Microstructures Collaborative Innovation Center of Advanced Microstructures and Jiangsu Provincial Key Laboratory for Nanotechnology School of Physics and Electronic Engineering National Key Laboratory of Spintronics

Ferromagnetic graphene is particularly promising for spintronics devices applications, in which Ruderman-Kittel-Kasuya-Yosida (RKKY) interaction is widely considered to play the crucial role in the magnetic coupling between the adjacent localized spins. Recent theoretical studies show that integrating electron transfer effect into the typical RKKY interaction can effectively tune the decay rate and the oscillation behavior. However, the real system for studying such behavior remains scarce. Here, by combining magnetization measurements and first-principles calculations, we show that semi-ionic F (s-F)-doped graphene (s-FG) exhibits peculiar s-F-concentration-dependent magnetism and is a real platform for such study. Especially, with the decrease of the s-F concentration of s-FG, its ferromagnetic TC exhibits an unusual increase. First-principles calculations show that the magnetism of s-FG (i) can be understood by the picture of RKKY behavior that the localized spins are mainly located on s-F adatoms accompanied by partial spin polarization of nearby carbon atoms, while (ii) it deviates the typical sublattice-dependent RKKY behavior presented as a nonmagnetic or antiferromagnetic state for localized spins on the same sublattice for some s-FG structures. The peculiar behavior is proposed to be related to the electron transfer effect, which can be evidenced by the good consistency of magnetism of s-FG by an effective Anderson impurity model.

关键词： Magnetism RKKY interaction 2-dimensional systems Graphene

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Electric-Field-Treated Ni/Co_(3)O_(4) Film as High-Performance Bifunctional Electrocatalysts for Efficient Overall Water Splitting

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Nano-Micro Letters 2022年第9期14卷 160-173页

作者： Junming Li Jun Li Jun Ren Hong Hong Dongxue Liu Lizhe Liu Dunhui Wang National Laboratory of Solid State Microstructures Collaborative Innovation Center of Advanced MicrostructuresJiangsu Provincial Key Laboratory for NanotechnologySchool of PhysicsNanjing UniversityNanjing 210093People’s Republic of China Hangzhou Dianzi University Hangzhou 310018People’s Republic of China

Rational design of bifunctional electrocatalysts for oxygen evolution reaction(OER)and hydrogen evolution reaction(HER)with excellent activity and stability is of great significance,since overall water splitting is a promising technology for sustainable conversion of clean ***,most electrocatalysts do not simultaneously possess optimal HER/OER activities and their electrical conductivities are intrinsically low,which limit the development of overall water *** this paper,a strategy of electric field treatment is proposed and applied to Ni/Co_(3)O_(4) film to develop a novel bifunctional *** treated by electric field,the conductive channels consisting of oxygen vacancies are formed in the Co_(3)O_(4) film,which remarkably reduces the resistance of the system by almost 2×10^(4) ***,the surface Ni metal electrode is partially oxidized to nickel oxide,which enhances the catalytic *** electric-field-treated Ni/Co_(3)O_(4) material exhibits super outstanding performance of HER,OER,and overall water splitting,and the catalytic activity is significantly superior to the state-of-the-art noble metal catalysts(Pt/C,RuO_(2),and RuO_(2)‖Pt/C couple).This work provides an effective and feasible method for the development of novel and efficient bifunctional electrocatalyst,which is also promising for wide use in the field of catalysis.

关键词： Bifunctional electrocatalyst Overall water splitting Co_(3)O_(4)film Oxygen vacancies Electric field

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High-precision trajectory calibration for robot surface machining by meta-heuristic search algorithm from local error in machining area

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International Journal of advanced Manufacturing Technology 2025年第5期138卷 2281-2295页

作者： Bi, Guangde Lu, Lei Zhang, Lei Fan, Cheng Sun, Lining School of Mechanical and Electric Engineering Jiangsu Provincial Key Laboratory of Advanced Robotics Soochow University Suzhou215123 China State Key Laboratory of Robotics and System Harbin Institute of Technology Harbin150001 China

Industrial robots used in complex surface machining are gradually increasing because of their high flexibility and large workspace. However, due to their low geometric accuracy, their application in high-precision surface machining is hindered. In order to improve the machining accuracy, a high-precision robot trajectory calibration method for complex surface machining is proposed. In the machining process, the machining trajectory is usually only within a certain machining area. In the method, high-precision standard balls are set at the boundary of the machining area. Based on the precise position information of these standard balls, the trajectory of the robot in the machining area is calibrated. Compared with the global robot calibration method, the proposed method can calibrate the robot trajectory in the machining area through standard parts, which will improve the trajectory accuracy of the machining robot to the level of repeated positioning accuracy. In this method, a large amount of standard ball data is obtained by the in-place measuring device before the machining process. Then, based on these data, a meta-heuristic search algorithm is used to calibrate the kinematic deviation of the robot measurement and the machining system. The trajectory of the machining robot is adjusted by the kinematic deviation after calibration, and it is applied to the motion control of the machining process to improve the positioning accuracy of the machining trajectory. In the end, to verify the accuracy and practicability of the machining trajectory obtained by this method, measurement and machining experiments are carried out. © The Author(s), under exclusive licence to Springer-Verlag London Ltd., part of Springer Nature 2025.

关键词： Industrial robots

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A Biomimetic Stress Field Modulation Strategy Inspired by Scorpion Compound Slit Sensilla Enabled High-Accuracy and Low-Power Positioning Sensor for Identifying the Load Incident Angles

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Journal of Bionic Engineering 2025年第2期22卷 727-738页

作者： Junqiu Zhang Yu Chen Haoran Li Jiqi Gao Xiangbo Gu Jiachao Wu Xiaojing Qin Kejun Wang Bin Zhu Daobing Chen Tao Sun Jianhua Fan Zhiwu Han Luquan Ren Key Laboratory of Bionic Engineering Ministry of EducationJilin UniversityChangchun130022People’s Republic of China Institute of Structured and Architected Materials Liaoning Academy of MaterialsShenyang110167China Jiangsu Provincial Key Laboratory of Advanced Robotics Soochow UniversitySuzhou215123People’s Republic of China School of Mechanical Engineering Sciences University of SurreyGuildfordGU27XHUK The Institute of Technological Science Wuhan UniversityWuhan430072China School of Mechanical and Aerospace Engineering Jilin UniversityChangchun130025China

Numerous arthropods evolve and optimize sensory systems, enabling them to effectively adapt complex and competitive habitats. Typically, scorpions can precisely perceive the prey location with the lowest metabolic rate among invertebrates. This biological phenomenon contrasts sharply with engineered systems, which generally associates high accuracy with substantial energy consumption. Inspired by the Scorpion Compound Slit Sensilla (SCSS) with a stress field modulation strategy, a bionic positioning sensor with superior precision and minimal power consumption is developed for the first time, which utilizes the particular Minimum Positioning Units (MPUs) to efficiently locate vibration signals. The single MPU of the SCSS can recognize the direction of collinear loads by regulating the stress field distribution and further, the coupling action of three MPUs can realize all-angle vibration monitoring in plane. Experiments demonstrate that the bionic positioning sensor achieves 1.43 degrees of angle-error-free accuracy without additional energy supply. As a proof of concept, two bionic positioning sensors and machine learning algorithm are integrated to provide centimeter (cm)-accuracy target localization, ideally suited for the man-machine interaction. The novel design offers a new mechanism for the design of traditional positioning devices, improving precision and efficiency in both the meta-universe and real-world Internet-connected systems.

关键词： Scorpion Compound Slit Sensilla(SCSS) Vibration Source Stress Field Modulation Strategy High-accuracy and low-power Positioning Sensor Minimum Positioning Unit(MPU)

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