检索结果-南通市图书馆

Dynamic behavior of tunneling triboelectric charges in two-dimensional materials

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 far.The 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

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

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

引用

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 change.Optical absorption and Raman spectroscopic measurements were carried out on two natural carbonate samples in diamond-anvil cells up to 60 GPa.Mg-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 state.The 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 crossover.The 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 carbonates.These 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

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

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

引用

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 pollution.Importantly,developing ultrathin absorbent is acknowledged as a linchpin in the design of lightweight and flexible electronic devices,but there are remaining unprecedented challenges.Herein,the self-assembly VS_(4)/rGO heterostructure is constructed to be engineered as ultrathin microwave absorbent through the strategies of architecture design and interface engineering.The 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 constant.The 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,respectively.The effective absorption bandwidth of 4.8 GHz can be achieved with an ultrathin thickness of 1.4 mm.The far-reaching comprehension of the heterointerface on microwave absorption performance is explicitly unveiled by experimental results and theoretical calculations.Microarchitecture and heterointerface synergistically inspire multi-dimensional advantages to enhance dipole polarization,interfacial polarization,and multiple reflections and scatterings of microwaves.Overall,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

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

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

引用

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 applications.Due to the wide selection of materials,the diversity of device structures,and the complexity of working environment,TENGs show unique characteristics in the service behavior.These dilemmas lead to the fact that systematical summary of service behavior for TENGs is still in its infancy.Here,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 surroundings.We 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 failure.Then,the service adaptability of TENG is systematically discussed,including the biological and environmental compatibility.Finally,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

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

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

引用

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 mantle.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 cells.The 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 GPa.In 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 majorite.The 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 Korea.Furthermore,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

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

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

引用

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 equipment.Thus,the multifunction and high robustness are two important requirements for sensing capability of the e-skin.Here,a fully organic self-powered e-skin(FOSE-skin)based on the triboelectric nanogenerator(TENG)is developed.FOSE-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 electrode.FOSE-skin based on TENG has the multifunctional and highly robust sensing capability and can sense the pressure and temperature simultaneously.The sensing capability of the FOSE-skin based on TENG can be highly robust with no changes after self-healing.FOSE-skin based on TENG can be employed to detect the arm swing,the temperature change of flowing water,and the motion trajectory.This 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

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

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

引用

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 tasks.However,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 stimuli.Here,we report a high-sensitive and self-selective humanoid mechanoreceptor(HMR)that can precisely respond to spatiotemporal tactile stimuli.The 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 mechanisms.Consequently,it can respond to spatiotemporal tactile stimuli and generate distinguishable and multi-type characteristic signals.With 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

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Q235钢表面TIG+激光重熔制备锆基涂层研究

引用

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

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Climatology of Cloud-base Height from Long-term Radiosonde Measurements in China

引用

Advances in Atmospheric Sciences 2018年第2期35卷 158-168页

作者： Yong ZHANG Lejian ZHANG Jianping GUO Jinming FENG Lijuan CAO Yang WANG Qing ZHOU liangxu LI Bai LI Hui xu Lin LIU Ning AN Huan LIU Meteorological Observation Center China Meteorological Administration State Key Laboratory of Severe Weather Chinese Academy of Meteorological Sciences Key Laboratory of Regional Climate-Environment for Temperate East Asia Institute of Atmospheric PhysicsChinese Academy of Sciences National Meteorological Information Center China Meteorological Administration College of Global Change and Earth System Science Beijing Normal University

Clouds are critical to the global radiation budget and hydrological cycle, but knowledge is still poor concerning the observed climatology of cloud-base height （CBH） in China. Based on fine-resolution sounding observations from the China Radiosonde Network （CRN）, the method used to estimate CBH was modified, and uncertainty analyses indicated that the CBH is good enough. The accuracy of CBH estimation is verified by the comparison between the sounding-derived CBHs and those estimated from the micro-pulse lidar and millimeter-wave cloud radar. As such, the CBH climatology was compiled for the period 2006-16. Overall, the CBH exhibits large geographic variability across China, at both 0800 Local Standard Time （LST） and 2000 LST, irrespective of season. In addition, the summertime cloud base tends to be elevated to higher altitudes in dry regions [i.e., Inner Mongolia and the North China Plain （NCP）]. By comparison, the Tibetan Plateau （TP）, Pearl River Delta （PRD） and Sichuan Basin （SCB） have relatively low CBHs （〈 2.4 km above ground level）. In terms of seasonality, the CBH reaches its maximum in summer and minimum in winter. A low cloud base tends to occur frequently （〉 70%） over the TP, PRD and SCB. In contrast, at most sites over the Yangtze River Delta （YRD） and the NCP, about half the cloud belongs to the high-cloud category. The CBH does not exhibit marked diurnal variation in summer, throughout all CRN sites, probably due to the persistent cloud coverage caused by the East Asia Summer Monsson. To the best of our knowledge, this is the first CBH climatology produced from sounding measurements in China, and provides a useful reference for obtaining observational cloud base information.

关键词： cloud base height radiosonde relative humidity China climatology

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

混合动力轿车动力线缆对整车电磁辐射干扰的仿真与试验研究

引用

汽车工程 2014年第6期36卷 734-739页

作者：杜明磊徐中明丁良旭重庆大学机械工程学院重庆400030 重庆通信学院电力工程系重庆400035 重庆市电磁兼容工程技术研究中心重庆401122

通过分析混合动力轿车内动力线缆的电磁耦合路径,分别建立整车车身和动力线缆的电磁仿真模型,采用"场-路"耦合方法推导出线缆电磁辐射强度的计算模型,进而进行动力线缆电磁辐射特性的仿真。结果表明,动力线缆长度的变化会改变其电磁辐... 详细信息

通过分析混合动力轿车内动力线缆的电磁耦合路径,分别建立整车车身和动力线缆的电磁仿真模型,采用"场-路"耦合方法推导出线缆电磁辐射强度的计算模型,进而进行动力线缆电磁辐射特性的仿真。结果表明,动力线缆长度的变化会改变其电磁辐射频谱分布,对辐射强度影响很小;端接电阻和线缆离地距离对线缆的辐射强度影响明显,电阻越大、离地距离越大,则动力线缆辐射越强;最后通过实车测试证实,动力线缆的屏蔽对降低其电磁辐射强度有良好效果。

关键词：混合动力轿车动力线缆电磁辐射强度传输线模型

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：