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A high-sensitive and self-selective humanoid mechanoreceptor for spatiotemporal tactile stimuli cognition

Nano Research 2024年第5期17卷 4400-4409页

作者： Shuxin Bi xuan Zhao Fangfang Gao Xiaochen xun Bin Zhao liangxu xu Tian Ouyang Qingliang Liao Yue Zhang Academy for Advanced Interdisciplinary Science and Technology Beijing Advanced Innovation Center for Materials Genome EngineeringUniversity of Science and Technology(Beijing)Beijing 100083China Key Laboratory of Advanced Materials and Devices for Post-Moore Chips Ministry of EducationBeijing Key Laboratory for Advanced Energy Materials and TechnologiesSchool of Materials Science and EngineeringUniversity of Science and Technology BeijingBeijing 100083China

The cognition of spatiotemporal tactile stimuli,including fine spatial stimuli and static/dynamic temporal stimuli,is paramount for intelligent robots to feel their surroundings and complete manipulation ***,current tactile sensors have restrictions on simultaneously demonstrating high sensitivity and performing selective responses to static/dynamic stimuli,making it a challenge to effectively cognize spatiotemporal tactile ***,we report a high-sensitive and self-selective humanoid mechanoreceptor(HMR)that can precisely respond to spatiotemporal tactile *** HMR with PDMS/chitosan@CNTs(PDMS:polydimethylsiloxane;CNT:carbon nanotube)graded microstructures and polyurethane hierarchical porous spacer exhibits high sensitivity of 3790.8 kPa^(-1).The HMR demonstrates self-selective responses to static and dynamic stimuli with mono signal through the hybrid of piezoresistive and triboelectric ***,it can respond to spatiotemporal tactile stimuli and generate distinguishable and multi-type characteristic *** the assistance of the convolutional neural network,multiple target objects can be easily identified with a high accuracy of 99.1%.This work shows great potential in object precise identification and dexterous manipulation,which is the basis of intelligent robots and natural human-machine interactions.

关键词： mechanoreceptors self-selective high-sensitive spatiotemporal tactile stimuli cognition sensors

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Effects of Spin Transition and Cation Substitution on the Optical Properties and Iron Partitioning in Carbonate Minerals

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Acta Geologica Sinica(English Edition) 2023年第1期97卷 350-357页

作者： HU Jun xu liangxu LIU Jin YUE Donghui Center for High Pressure Science(CHiPS) State Key Laboratory of Metastable Materials Science and TechnologyYanshan UniversityQinhuangdaoHebei 066004China Center for High Pressure Science and Technology Advanced Research Beijing 100193China Heilongjiang Province Key Laboratory of Superhard Materials Department of PhysicsMudanjiang Normal UniversityMudanjiangHeilongjiang 157012China

The high-pressure behavior of deep carbonate dictates the state and dynamics of oxidized carbon in the Earth's mantle,playing a vital role in the global carbon cycle and potentially influencing long-term climate *** absorption and Raman spectroscopic measurements were carried out on two natural carbonate samples in diamond-anvil cells up to 60 ***-substitution in high-spin siderite FeCO_(3)increases the crystal field absorption band position by approximately 1000 cm^(-1),but such an effect is marginal at>40 GPa when entering the low-spin *** crystal field absorption band of dolomite cannot be recognized upon compression to 45.8 GPa at room temperature but,in contrast,the high-pressure polymorph of dolomite exhibits a strong absorption band at frequencies higher than(Mg,Fe)CO_(3)in the lowspin state by 2000–2500 cm^(-1).Additionally,these carbonate minerals show more complicated features for the absorption edge,decreasing with pressure and undergoing a dramatic change through the spin *** optical and vibrational properties of carbonate minerals are highly correlated with iron content and spin transition,indicating that iron is preferentially partitioned into low-spin *** results shed new light on how carbonate minerals evolve in the mantle,which is crucial to decode the deep carbon cycle.

关键词： carbonate petrology/mineralogy mantle high pressure diamond-anvil cell iron spin transition iron partitioning deep carbon cycle

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Dynamic behavior of tunneling triboelectric charges in two-dimensional materials

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International Journal of Minerals,Metallurgy and Materials 2023年第9期30卷 1801-1808页

作者： xuan Zhao liangxu xu Xiaochen xun Fangfang Gao Qingliang Liao Yue Zhang Academy for Advanced Interdisciplinary Science and Technology School of Materials Science and EngineeringUniversity of Science and Technology BeijingBeijing 100083China Beijing Advanced Innovation Center for Materials Genome Engineering Beijing Key Laboratory for Advanced Energy Materials and TechnologiesUniversity of Science and Technology BeijingBeijing 100083China

Although the research history of triboelectrification has been more than 2000 years, there are still many problems to be solved so *** use of scanning probe microscopy provides an important way to quantitatively study the transfer, accumulation, and dissipation of triboelectric charges in the process of triboelectrification. Two-dimensional materials are considered to be key materials for new electronic devices in the post-Moore era due to their atomic-scale size advantages. If the electrostatic field generated by triboelectrification can be used to replace the traditional gate electrostatic field, it is expected to simplify the structure of two-dimensional electronic devices and reconfigure them at any time according to actual needs. Here, we investigate the triboelectrification process of various two-dimensional materials such as MoS_(2), WSe_(2),and ZnO. Different from traditional bulk materials, after two-dimensional materials are rubbed, the triboelectric charges generated may tunnel through the two-dimensional materials to the underlying substrate surface. Because the tunneling triboelectric charge is protected by the twodimensional material, its stable residence time on the substrate surface can reach more than 7 days, which is more than tens of minutes for the traditional triboelectric charge. In addition, the electrostatic field generated by the tunneling triboelectric charge can effectively regulate the carrier transport performance of two-dimensional materials, and the source–drain current of the field effect device regulated by the triboelectric floating gate is increased by nearly 60 times. The triboelectric charge tunneling phenomenon in two-dimensional materials is expected to be applied in the fields of new two-dimensional electronic devices and reconfigurable functional circuits.

关键词： two-dimensional materials triboelectric charge dynamic behavior reconfigurable electronics

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Architecture Design and Interface Engineering of Self-assembly VS_(4)/rGO Heterostructures for Ultrathin Absorbent

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Nano-Micro Letters 2022年第4期14卷 222-237页

作者： Qi Li xuan Zhao Zheng Zhang Xiaochen xun Bin Zhao liangxu xu Zhuo Kang Qingliang Liao Yue Zhang Academy for Advanced Interdisciplinary Science and Technology Beijing Advanced Innovation Center for Materials Genome EngineeringBeijing Key Laboratory for Advanced Energy Materials and TechnologiesSchool of Materials Science and EngineeringUniversity of Science

The employment of microwave absorbents is highly desirable to address the increasing threats of electromagnetic ***,developing ultrathin absorbent is acknowledged as a linchpin in the design of lightweight and flexible electronic devices,but there are remaining unprecedented ***,the self-assembly VS_(4)/rGO heterostructure is constructed to be engineered as ultrathin microwave absorbent through the strategies of architecture design and interface *** microarchitecture and heterointerface of VS_(4)/rGO heterostructure can be regulated by the generation of VS_(4) nanorods anchored on rGO,which can effectively modulate the impedance matching and attenuation *** maximum reflection loss of 2VS_(4)/rGO40 heterostructure can reach−43.5 dB at 14 GHz with the impedance matching and attenuation constant approaching 0.98 and 187,*** effective absorption bandwidth of 4.8 GHz can be achieved with an ultrathin thickness of 1.4 *** far-reaching comprehension of the heterointerface on microwave absorption performance is explicitly unveiled by experimental results and theoretical *** and heterointerface synergistically inspire multi-dimensional advantages to enhance dipole polarization,interfacial polarization,and multiple reflections and scatterings of ***,the strategies of architecture design and interface engineering pave the way for achieving ultrathin and enhanced microwave absorption materials.

关键词： Architecture design Interface Self-assembly Microwave absorption

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Service behavior of triboelectric nanogenerators:Bridging the gap between prototypes and applications

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Nano Research 2023年第9期16卷 11731-11752页

作者： Fangfang Gao Xiaochen xun xuan Zhao liangxu xu Qi Li Bin Zhao Tian Ouyang Qingliang Liao Yue Zhang Academy for Advanced Interdisciplinary Science and Technology Beijing Advanced Innovation Center for Materials Genome EngineeringUniversity of Science and Technology BeijingBeijing 100083China Beijing Key Laboratory for Advanced Energy Materials and Technologies School of Materials Science and EngineeringUniversity of Science and Technology BeijingBeijing 100083China

The triboelectric nanogenerators(TENGs),suppling power for freely mobile and distributed electronic equipment from Internet of Things,have been considered as“the energy for the new era”.Research on the service behavior has become increasingly important for achieving the reliability evaluation and life prediction of TENGs,as TENGs advance from prototypes to practical *** to the wide selection of materials,the diversity of device structures,and the complexity of working environment,TENGs show unique characteristics in the service *** dilemmas lead to the fact that systematical summary of service behavior for TENGs is still in its ***,the progresses of the service behavior for TENGs are comprehensively reviewed from the influence of environmental factors on the service performance of TENGs to the impact of TENGs during the service on their *** summed up the performance evolution of TENGs in the real environment and the reproducibility of TENGs of which the electrical output will be restored after ***,the service adaptability of TENG is systematically discussed,including the biological and environmental ***,the challenges and opportunities that the related research faced are proposed to promote the emerging technology from laboratory to factory.

关键词： triboelectric nanogenerator self-powered sensor service behavior environmental influence

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The effect of iron on the sound velocities ofδ-AlOOH up to 135 GPa

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Geoscience Frontiers 2021年第2期12卷 937-946页

作者： Xiaowan Su Chaoshuai Zhao Chaojia Lv Yukai Zhuang Nilesh Salke liangxu xu Hu Tang Huiyang Gou Xiaohui Yu Qiang Sun Jin Liu School of Earth and Space Sciences Peking UniversityBeijing100871China Center for High Pressure Science and Technology Advanced Research Beijing100094China Beijing National Laboratory for Condensed Matter Physics Institute of PhysicsChinese Academy of SciencesBeijing100190China

δ-(Al,Fe)OOH is considered to be one of the most important hydrous phases on Earth,remaining stable under the extreme conditions throughout the *** behavior ofδ-(Al,Fe)OOH at high pressure is essential to understanding the deep water cycle.δ-(Al_(0.956)Fe_(0.044))OOH crystals synthesized at 21 GPa and 1473 K were investigated by high-pressure Brillouin light scattering spectroscopy and synchrotron X-ray diffraction up to 135.4 GPa in diamond anvil *** incorporation of 5 mol%FeOOH increases the unit-cell volume ofδ-AlOOH by~1%and decreases the shear-wave velocity(VS)by~5%at 20–135 *** particular,the compressional(V_(P))and shear(VS)wave velocities ofδ-(Al_(0.956)Fe_(0.044))OOH are 7%–16%and 10%–24%greater than all the major minerals in the mantle transition zone including wadsleyite,ringwoodite,and *** distinctly high sound velocities ofδ-(Al_(0.956)Fe_(0.044))OOH at 20–25 GPa may contribute to the seismic anomalies observed at~560–680 km depths in the cold and stagnant slab beneath Izu-Bonin and/or ***,the VS ofδ-(Al_(0.956)Fe_(0.044))OOH is about 10%and 4%–12%lower than iron-bearing bridgmanite Mg_(0.96)Fe_(0.05)Si_(0.99O3)and ferropericlase(Mg_(0.92)Fe_(0.08))O,respectively,under the lowermost mantle conditions,which might partially contribute to the large low-shear-velocity provinces and ultralow velocity zones at the bottom of the lower mantle.

关键词： Deep water cycle Fe-bearing delta phase Seismic anomalies High pressure

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Changes in albedo and its radiative forcing of grasslands in East Asia drylands

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Ecological Processes 2024年第1期13卷 237-251页

作者： Qingsong Zhu Jiquan Chen liangxu Wu Yuting Huang Changliang Shao Gang Dong Zhe xu Xianglan Li State Key Laboratory of Remote Sensing Science College of Global Change and Earth System Science Faculty of Geographical ScienceBeijing Normal University Department of Geography Environment and Spatial Sciences Michigan State University State Key Laboratory of Efficient Utilization of Arid and Semi-Arid Arable Land in Northern China National Hulunber Grassland Ecosystem Observation and Research Station Institute of Agricultural Resources and Regional Planning Chinese Academy of Agricultural Sciences School of Life Science Shanxi University

Background Grasslands in drylands are increasingly influenced by human activities and climate change, leading to alterations in albedo and radiative energy balance among others. Surface biophysical properties and their interactions change greatly following disturbances. However, our understanding of these processes and their climatic impacts remains limited. In this study, we used multi-year observations from satellites and eddy-covariance towers to investigate the response of albedo to variables closely associated with human disturbances, including vegetation greenness（EVI） and surface soil volumetric water content（VWC）, as well as snow cover and clearness index（Ta） for their potential *** EVI and VWC during the growing season were the primary factors influencing albedo. EVI and VWC were negatively correlated with albedo, with VWC's total direct and indirect impacts being slightly smaller than those of EVI. During the non-growing season, snow cover was the most influential factor on albedo. VWC and Ta negatively affected albedo throughout the year. We estimated the impact of variations in EVI and VWC on climate to be in the range of 0.004 to 0.113 kg CO2m-2yr-1in *** This study indicates the significant impacts of climate change and human disturbances on vulnerable grassland ecosystems from the perspective of altered albedo. Changes in vegetation greenness and soil properties induced by climate change and human activities may have a substantial impact on albedo, which in turn feedback on climate change, indicating that future climate policies should take this factor into consideration.

关键词： Albedo Global warming potential Grassland Disturbance

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Fully Organic Self-Powered Electronic Skin with Multifunctional and Highly Robust Sensing Capability

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Research 2021年第1期2021卷 951-960页

作者： Lijuan Song Zheng Zhang Xiaochen xun liangxu xu Fangfang Gao xuan Zhao Zhuo Kang Qingliang Liao Yue Zhang Beijing Advanced Innovation Center for Materials Genome Engineering Beijing Key Laboratory for Advanced Energy Materials and TechnologiesUniversity of Science and Technology BeijingBeijing 100083China State Key Laboratory for Advanced Metals and Materials School of Materials Science and EngineeringUniversity of Science and Technology BeijingBeijing 100083China

Electronic skin(e-skin)with skin-like flexibility and tactile sensation will promote the great advancements in the fields of wearable ***,the multifunction and high robustness are two important requirements for sensing capability of the ***,a fully organic self-powered e-skin(FOSE-skin)based on the triboelectric nanogenerator(TENG)is ***-skin based on TENG can be fully self-healed within 10 hours after being sheared by employing the self-healing polymer as a triboelectric layer and ionic liquid with the temperature sensitivity as an ***-skin based on TENG has the multifunctional and highly robust sensing capability and can sense the pressure and temperature *** sensing capability of the FOSE-skin based on TENG can be highly robust with no changes after ***-skin based on TENG can be employed to detect the arm swing,the temperature change of flowing water,and the motion *** work provides a new idea for solving the issues of monofunctional and low robust sensing capability for FOSE-skin based on TENG,which can further promote the application of wearable electronics in soft robotics and bionic prosthetics.

关键词： Skin healing Highly

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高压下单晶橄榄石的电导率

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高压物理学报 2019年第6期33卷 20-28页

作者：田浩然徐良旭李娜娜张茜林俊孚刘锦北京高压科学研究中心北京100193 德克萨斯大学奥斯汀分校美国德克萨斯78701

以圣卡洛斯(San Carlos)单晶橄榄石为研究对象,结合交流阻抗谱和金刚石对顶砧(DAC)技术,在300 K、0~19 GPa条件下对其电导率的各向异性进行系统研究。压力标定根据红宝石荧光谱线的漂移以及硅油的拉曼光谱。实验结果表明:在300 K、0~19 ... 详细信息

以圣卡洛斯(San Carlos)单晶橄榄石为研究对象,结合交流阻抗谱和金刚石对顶砧(DAC)技术,在300 K、0~19 GPa条件下对其电导率的各向异性进行系统研究。压力标定根据红宝石荧光谱线的漂移以及硅油的拉曼光谱。实验结果表明:在300 K、0~19 GPa条件下,橄榄石[100]方向上的电导率最大,从3.8×10^–8 S/m增加到9.0×10^–8 S/m,[010]与[001]方向上的电导率接近,约为[100]方向电导率的1/2~1/3;橄榄石电导率随着压力线性增加,其中[100]方向的电导率随着压力变化的斜率最大。在室温条件下,橄榄石主要的导电机制是小极化子导电,且具有负的活化体积。研究结果表明,在含水量较低的上地幔区域,随着深度增加,压力效应可能导致电导率横向和纵向的不均一性增强。

关键词：橄榄石复阻抗谱金刚石压腔电导率各向异性

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Q235钢表面TIG+激光重熔制备锆基涂层研究

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焊接技术 2022年第9期51卷 17-21页

作者：高文杰徐良旭山东科技大学材料科学与工程学院山东青岛266510

为了提高Q235钢的表面耐磨性和耐蚀能力,文中用TIG熔覆+激光重熔方法在Q235钢表面制备了几种不同成分的锆基合金涂层。TIG熔覆有利于涂层与基材良好结合、减少裂纹和气孔,并有利于涂层成分的均匀化,激光重熔还可以提供极快的冷却速度并... 详细信息

为了提高Q235钢的表面耐磨性和耐蚀能力,文中用TIG熔覆+激光重熔方法在Q235钢表面制备了几种不同成分的锆基合金涂层。TIG熔覆有利于涂层与基材良好结合、减少裂纹和气孔,并有利于涂层成分的均匀化,激光重熔还可以提供极快的冷却速度并利于表面细晶的形成。结果表明:采用TIG熔覆与激光重熔工艺成功地制备出了Zr基合金涂层,整个涂层成分均匀,组织致密,孔隙率低,涂层组织晶粒细小,表面具有高硬度和高耐磨性,显微硬度最高达到了HV700.2,锆基涂层较基体腐蚀电位更偏正向,并且自腐蚀电流密度更低,提高了涂层表面的耐蚀性,能够满足实际使用要求。

关键词： TIG熔覆激光重熔锆基合金

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