检索结果-内蒙古大学图书馆

SSRN 2022年

作者： Lee, Sungju Kim, Jeong-Gil Yu, Hayoung Lee, Dong-Myung Hong, Seungki Kim, Seung Min Choi, Seon-Jin Kim, Nam Dong Jeong, Hyeon Su Institute of Advanced Composite Materials Korea Institute of Science and Technology 92 Chudong-ro Bongdong-eup Jeollabul-do Wanju-gun55324 Korea Republic of Division of Materials of Science and Engineering Hanyang University 222 Wangsimni-ro Seongdong-gu Seoul04763 Korea Republic of Department of Chemical and Biomolecular Engineering Korea Advanced Institute of Science and Technology 291 Daehak-ro Yuseong-gu Daejeon34141 Korea Republic of

Fiber-shaped supercapacitors (FSSCs) based on next-generation carbon-based fibers are widely studied as the most suitable power supplies for wearable devices;however, achieving high capacitance in weight, volume and length with a single fiber simultaneously, which is necessary to realize practical FSSCs, has rarely been reported. Here, we show that a single ultra-thick carbon nanotube fiber (UCNTF, 10 tex) with high linear density can function as a practical electrode material in FSSCs for the first time. A series of sonochemical treatments is used to modify the internal structure and physical properties of pristine UCNTFs and further synthesize pseudocapacitive active materials (i.e., polyaniline (PANI)) on the pretreated UCNTFs. Notably, the prepared PANI-incorporated UCNTF, when assembled into a symmetric FSSC, exhibits a high specific capacitance of 335 F g−1 at 1 A g−1, an excellent volumetric capacitance of 523.3 F cm−3 and an outstanding length capacitance of 96.5 mF cm−1 without additional fibers being added. In addition, the FSSCs exhibit high flexibility (98.4% at a bending angle of 90°) and stability (80.1% after 20,000 bending cycles). We believe that the first report of a FSSCs made with a single CNTF on an industrial scale opens up a new opportunity for commercializing wearable energy storage. © 2022, The Authors. All rights reserved.

关键词： Supercapacitor

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Realizing Ultrahigh Thermal Conductivity in Bimodal-Diamond/Al Composites Via Interface engineering

SSRN

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SSRN 2022年

作者： Zhao, Li-Dong Li, Ning Zhang, Yongjian Zhang, Yang Wang, Xitao Wu, Haijun Zhang, Hailong State Key Laboratory for Advanced Metals and Materials University of Science and Technology Beijing Beijing100083 China Department of Materials Science and Engineering National University of Singapore Singapore117575 Singapore State Key Laboratory for Manufacturing Systems Engineering China Collaborative Innovation Center of Steel Technology University of Science and Technology Beijing Beijing100083 China Jinan250014 China State Key Laboratory for Mechanical Behavior of Materials Xi’an Jiaotong University Xi’an710049 China School of Materials Science and Engineering Beihang University Beijing100191 China Hangzhou Innovation Institute of Beihang University Hangzhou310051 China

Bulk materials with high thermal conductivity are fundamentally important to heat dissipation of high-power devices. In this study, a record high thermal conductivity of 1021 ± 34 W m-1 K-1 is achieved in the diamond/Al composite reinforced with bimodal diamond particles. Meanwhile, a coefficient of thermal expansion (CTE) of 3.81 × 10-6 K-1 is achieved that is compatible with the semiconductors applied in the high-power devices (~8% lower and ~3% higher than CTE of a-GaN and c-GaN, respectively). The excellent thermal transport properties stem from the increased heat transport channels and well-bonded diamond/Al interfaces. Importantly, the thermal conductivity can also be retained as high as 557 ± 17 W m-1 K-1 at 673 K in the diamond/Al composites, which could greatly widen their applications at high temperatures. This study indicates that concurrently achieving high interfacial thermal conductance, high diamond content, large diamond particle size, and high relative density is the essential way to realize ultrahigh thermal conductivity and diamond/Al composites are promising thermal management materials. © 2022, The Authors. All rights reserved.

关键词： Thermal conductivity

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Effects of Environmental Media on the Growth Rate of Fatigue Crack in TC4 Titanium Alloy: Seawater and Air

SSRN

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SSRN 2023年

作者： Ren, Junqiang Li, Le Qi, Wang Xin, Chao Gao, Qing Li, Wei Li, Junchen Xue, Hongtao Lu, Xuefeng Tang, Fuling State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals Department of Materials Science and Engineering Lanzhou University of Technology Lanzhou730050 China School of Energy Engineering Huanghuai University Zhumadian463000 China Northwest Institute for Non-ferrous Metal Research Xi'An710049 China

The environmental medium significantly influences the fatigue crack growth rate of TC4 titanium alloy, with crack growth occurring faster in seawater than in air. This study employs scanning electron microscopy (SEM) in conjunction with electron back scattering diffraction (EBSD) to investigate the crack propagation path and the mechanisms of dislocation slip or twin deformation in the grains surrounding cracks in TC4 titanium alloy. The paper provides a detailed analysis of the reasons behind the rapid crack propagation of TC4 alloy in seawater while examining the impact of twin types at the crack tip and cyclic plastic zones on crack propagation. © 2023, The Authors. All rights reserved.

关键词： Scanning electron microscopy

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Antiferromagnetism and Ising ground states in the rare-earth garnet Nd3Ga5O12

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Physical Review B 2022年第1期105卷 014441-014441页

作者： N. Zhao H. Ge L. Zhou Z. M. Song J. Yang T. T. Li L. Wang Y. Fu Y. F. Zhang J. B. Xu S. M. Wang J. W. Mei X. Tong L. S. Wu J. M. Sheng Department of Physics Southern University of Science and Technology Shenzhen 518055 China Department of Chemistry Southern University of Science and Technology Shenzhen 518055 China Shenzhen Institute for Quantum Science and Engineering Shenzhen 518055 China Shenzhen Key Laboratory of Advanced Quantum Functional Materials and Devices Southern University of Science and Technology Shenzhen 518055 China Institute of High Energy Physics Chinese Academy of Sciences (CAS) Beijing 100049 China Spallation Neutron Source Science Center Dongguan 523803 China Academy for Advanced Interdisciplinary Studies Southern University of Science and Technology Shenzhen 518055 China

In this paper, we investigate the low temperature magnetic properties of the rare-earth garnet compound Nd3Ga5O12 in detail by means of magnetization, specific heat, and magnetocaloric effect measurements. The magnetic thermal properties along with the crystal field calculations reveal that the Nd3+ ions form into a frustrated hyper-kagome lattice with connected triangles have an Ising-like ground state with the easy axis along the local [100], [010], and [001] directions. Instead of a quantum spin liquid ground state, an antiferromagnetically ordered state is found below TN=0.52K. With applying field in the [111] direction, the antiferromagnetic order is suppressed at the critical field of Bc=0.75T, and enhancement of the critical fluctuations with linear crossover behaviors is observed near the critical point.

关键词： Antiferromagnetism Magnetism Quantum criticality

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Intralayer Negative Poisson’s Ratio in Two-Dimensional Black Arsenic by Strain engineering

arXiv

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arXiv 2023年

作者： Zhang, Jingjing Zhang, Weihan Zhang, Leining Du, Guoshuai Yu, Yunfei Xia, Qinglin Wu, Xu Wang, Yeliang Ji, Wei Qiao, Jingsi Ding, Feng Chen, Yabin Advanced Research Institute of Multidisciplinary Sciences Beijing Institute of Technology Beijing100081 China School of Aerospace Engineering Beijing Institute of Technology Beijing100081 China Beijing Key Laboratory of Optoelectronic Functional Materials & Micro-Nano Devices Department of Physics Renmin University of China Beijing100872 China Beijing Key Laboratory of Construction Tailorable Advanced Functional Materials and Green Applications MOE Key Laboratory of Cluster Science School of Chemistry and Chemical Engineering Beijing Institute of Technology Beijing100081 China School of Physics and Electronics Hunan Key Laboratory of Nanophotonics and Devices Central South University Changsha410083 China MIIT Key Laboratory for Low-Dimensional Quantum Structure and Devices School of Information and Electronics Beijing Institute of Technology Beijing100081 China Faculty of Materials Science and Engineering Institute of Technology for Carbon Neutrality Shenzhen Institute of Advanced Technology Chinese Academy of Sciences Shenzhen518055 China

Negative Poisson’s ratio as the anomalous characteristic generally exists in artificial architectures, such as re-entrant and honeycomb structures. The structures with negative Poisson’s ratio have attracted intensive attention due to their unique auxetic effect and many promising applications in shear resistant and energy absorption fields. However, experimental observation of negative Poisson’s ratio in natural materials barely happened, although various two-dimensional layered materials are predicted in theory. Herein, we report the anisotropic Raman response and the intrinsic intralayer negative Poisson’s ratio of two-dimensional natural black arsenic (b-As) via strain engineering strategy. The results were evident by the detailed Raman spectrum of b-As under uniaxial strain together with density functional theory calculations. It is found that b-As was softer along the armchair than zigzag direction. The anisotropic mechanical features and van der Waals interactions play essential roles in strain-dependent Raman shifts and negative Poisson’s ratio in the natural b-As along zigzag direction. This work may shed a light on the mechanical properties and potential applications of two-dimensional puckered materials. © 2023, CC BY-NC-SA.

关键词： Arsenic

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A fully integrated electronic fabric-enabled multimodal flexible sensors for real-time wireless pressure-humidity-temperature monitoring

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International Journal of Extreme Manufacturing 2024年第6期6卷 548-560页

作者： Yunlong Zhao Yangbo Yuan Haiyan Zhang Zijian Chen Haitao Zhao Guirong Wu Weihao Zheng Chenyang Xue Zongyou Yin Libo Gao Pen-Tung Sah Institute of Micro-Nano Science and Technology and Discipline of Intelligent Instrument and EquipmentXiamen UniversityXiamen 361102People's Republic of China Department of Engineering Science and Mechanics The Pennsylvania State UniversityUniversity ParkPA 16802United States of America Science and Technology on Vacuum Technology and Physics Laboratory Lanzhou Institute of PhysicsChinese Academy of Space TechnologyLanzhou 730000People's Republic of China Center for Intelligent and Biomimetic Systems Shenzhen Institute of Advanced TechnologyChinese Academy of SciencesShenzhen 518055GuangdongPeople's Republic of China School of Mechano-Electronic Engineering Xidian UniversityXian 710071People's Republic of China Key Laboratory of Instrumentation Science and Dynamic Measurement Ministry of Education North University of ChinaTaiyuan 030051People's Republic of China Innovation Laboratory for Sciences and Technologies of Energy Materials of Fujian Province(IKKEM) Xiamen 361005People's Republic of China Research School of Chemistry Australian National UniversityCanberraACT 2601Australia

Real-time physiological information monitoring can predict and prevent disease, or improve treatment by early diagnosis. A comprehensive and continuous monitoring of human health requires highly integrated wearable and comfortable sensing devices. To address this need, we propose a low-cost electronic fabric-enabled multifunctional flexible sensing integration platform that includes a flexible pressure sensor for monitoring postural pressure, a humidity sensor for monitoring the humidity of the skin surface, and a flexible temperature sensor for visualizing the ambient temperature around the human body. Thanks to the unique rough surface texture, hierarchical structure, and robust electromechanical features of the MXene-modified nonwoven fabrics, the flexible pressure sensor can achieve a monitoring sensitivity of 1529.1 kPa~(-1) and a pressure range of 150 kPa, which meets the demand for human pressure detection. In addition, the unique porous structure of the fabric and the stacked multilayer structure of MXene enable the humidity sensor to exhibit extremely high monitoring sensitivity, even through clothing, and still be able to detect the humidity on the skin *** sensors based on screen-printed thermochromic liquid crystals enable visual monitoring in the range of 0℃–65℃. Through further integration with flexible printed circuit board circuits, we demonstrate a proof-of-concept device that enables real-time monitoring of human physiological information such as physical pressure, humidity, and ambient temperature environment, suggesting that the device provides an excellent platform for the development of commercially viable wearable healthcare monitors.

关键词： wearable sensor non-invasive physiological monitoring MXene(Ti_3C_2T_x) thermochromic liquid crystals(TLCs) integrated sensor patch

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Recent progress of integrated circuits and optoelectronic chips

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science China(Information sciences) 2021年第10期64卷 103-135页

作者： Yue HAO Shuiying XIANG Genquan HAN Jincheng ZHANG Xiaohua MA Zhangming ZHU Xingxing GUO Yahui ZHANG Yanan HAN Ziwei SONG Yan LIU Ling YANG Hong ZHOU Jiangyi SHI Wei ZHANG Min XU Weisheng ZHAO Biao PAN Yangqi HUANG Qi LIU Yimao CAI Jian ZHU Xin OU Tiangui YOU Huaqiang WU Bin GAO Zhiyong ZHANG Guoping GUO Yonghua CHEN Yong LIU Xiangfei CHEN Chunlai XUE Xingjun WANG Lixia ZHAO Xihua ZOU Lianshan YAN Ming LI School of Microelectronics Xidian University State Key Laboratory of Integrated Service Networks Xidian University National Integrated Circuit Innovation Center School of Microelectronics Fudan University School of Integrated Circuit Science and Engineering Beihang University China Center for Information Industry Development Frontier Institute of Chip and System Fudan University Institute of Microelectronics Peking University Nanjing Electronic Devices Institute State Key Laboratory of Functional Material for Informatics Shanghai Institute of Microsystem and Information Technology Chinese Academy of Sciences Institute of Microelectronics Tsinghua University Center for Carbon-based Electronics Department of Electronics Peking University CAS Key Laboratory of Quantum Information University of Science and Technology of China CAS Center for Excellence and Synergetic Innovation Center in Quantum Information and Quantum Physics University of Science and Technology of China Origin Quantum Computing Company Limited Key Laboratory of Flexible Electronics & Institute of Advanced Materials Nanjing Tech University State Key Laboratory of Electronic Thin Films and Integrated Devices School of Optoelectronic Science and EngineeringUniversity of Electronic Science and Technology of China National Laboratory of Solid State Microstructures & College of Engineering and Applied Sciences Nanjing University State Key Laboratory on Integrated Optoelectronics Institute of Semiconductors Chinese Academy of Sciences Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of Sciences State Key Laboratory of Advanced Optical Communication Systems and Networks School of Electronics Engineering and Computer Science Peking University School of Electrical and Electronic Engineering Tiangong University Center for Information Photonics and Communications School of Information Science and TechnologySouthwest Jiaotong University School of Electronic Electrical and Communication Engineering

Integrated circuits(ICs) and optoelectronic chips are the foundation stones of the modern information society. The IC industry has been driven by the so-called "Moore's law" in the past 60 years, and now has entered the post Moore's law era. In this paper, we review the recent progress of ICs and optoelectronic chips. The research status, technical challenges and development trend of devices, chips and integrated technologies of typical IC and optoelectronic chips are focused on. The main contents include the development law of IC and optoelectronic chip technology, the IC design and processing technology, emerging memory and chip architecture, brain-like chip structure and its mechanism, heterogeneous integration, quantum chip technology, silicon photonics chip technology, integrated microwave photonic chip, and optoelectronic hybrid integrated chip.

关键词： integrated circuit photonic neural computing semiconductor science and technology optoelectronic device and chip photonic integrated circuit wide bandgap semiconductors silicon photonics hybrid integration quantum chip integrated microwave photonic

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Recent advances in Fenton and Fenton-like reaction mediated nanoparticle in cancer therapy

Biomedical Technology

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Biomedical technology 2023年 3卷 40-51页

作者： Huijie Han Jiachen Li Hélder A. Santos Department of Biomedical Engineering University Medical Center Groningen University of Groningen Groningen 9713 AV the Netherlands W.J. Korf Institute for Biomedical Engineering and Materials Science University Medical Center Groningen University of Groningen Groningen 9713 AV the Netherlands Drug Research Program Division of Pharmaceutical Chemistry and Technology Faculty of Pharmacy FI-00014 Helsinki Finland

Fenton and Fenton like reaction have been well clarified as efficient reactive oxygen species (ROS) sources in tumor, and have been widely developed into a cancer treatment method. Meanwhile, transition metal-based nanomaterials with Fenton or Fenton like reaction characteristics also have been well explored as therapeutic agents for the cancer therapy, mainly in chemo-dynamic and ferroptosis induced cancer therapy. Herein,to summarize recent advances in Fenton and Fenton like reaction mediated nanoparticles for cancer therapy, in this minireview, we first introduced the mechanisms of Fenton and Fenton like reaction and two therapeutic methods based on Fenton and Fenton like reaction, and then we introduced the well-designed nanoparticles with Fenton reaction or Fenton-like reaction characteristics for the cancer therapies. Finally its challenges and perspectives are discussed.

关键词： Fenton reaction Fenton like reaction Cancer therapy Chemodynamic therapy Ferroptosis

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Hf-Free Low Temperature Synthesis of Mxene for Electrochemical Hydrogen Production

SSRN

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SSRN 2024年

作者： Mohili, Ranjit D. Mahabhari, Kajal Patel, Monika Hemanth, N.R. Chaudhari, Nitin Jadhav, Arvind H. Lee, Kwangyeol Advanced Hybrid Nanomaterial Laboratory Department of Chemistry School of Energy Technology Pandit Deendayal Energy University Gujarat Gandhinagar382426 India Department of Materials Science and Engineering University of Washington SeattleWA98195 United States Jain University Jain Global Campus Bangalore562112 India Department of Chemistry Korea University Seoul02841 Korea Republic of

MXenes are attracting considerable interests as the electrocatalyst for hydrogen evolution reaction owing to their properties such as high conductivity, large surface area, and chemical stability. Synthesis of MXenes has been typically achieved by selectively etching A elements from MAX precursor using direct or in-situ formed of hydrofluoric acid (HF). However, use of HF raises safety and environmental concerns due to its highly corrosive and toxic nature. Additionally, HF introduces fluoride functional groups on the surface of MXenes that can have detrimental effect on electrochemical applications. Here, we report room temperature HF-free synthesis of MXene, where complete and successful etching of A-element is observed. In our approach, the oxidizing hydrogen peroxide acts as catalyst to weaken the bonds between the metal (M) and aluminum (Al) in the parent MAX phases, and then the chromium cation displaces the Al from MAX phase to form MXene. The anions from hydrogen peroxide and chromium chloride attach to the surface of freshly prepared bare MXene resulting in delaminated flaky crystals with hydrophilic functionalities (-Cl, -OH and =O). This process eliminates additional step for delamination and avoids the restacking of MXenes. We also performed structural characterization and electrochemical characterization on our novel synthesized MXenes to study the stability and hydrogen evolution performance in acidic media. Our room temperature etching approach does not require extra delamination or functionalization step and eliminates the use of HF. These advantages will surely accelerate the research on MXene family and exploration of MXenes for various applications. © 2024, The Authors. All rights reserved.

关键词： Hydrofluoric acid

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Strain tunability of perpendicular magnetic anisotropy in van der Waals ferromagnets VI3

arXiv

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arXiv 2022年

作者： Zhang, Xi Wang, Le Su, Huimin Xia, Xiuquan Liu, Cai Lin, Junhao Huang, Mingyuan Cheng, Yingchun Mei, Jia-Wei Dai, Jun-Feng Northwestern Polytechnical University Xi'An710072 China Shenzhen Institute for Quantum Science and Engineering Southern University of Science and Technology Shenzhen518055 China International Quantum Academy Shenzhen518048 China Department of Physics Southern University of Science and Technology Shenzhen518055 China Key Laboratory of Flexible Electronics Institute of Advanced Materials Jiangsu National Synergetic Innovation Center for Advanced Materials Nanjing Tech University Nanjing211816 China Shenzhen Key Laboratory of Advanced Quantum Functional Materials and Devices Southern University of Science and Technology Shenzhen518055 China Shenzhen Key Laboratory of Quantum Science and Engineering Shenzhen518055 China

Layered ferromagnets with high coercivity have special applications in nanoscale memory elements in electronic circuits, such as data storage. Therefore, searching for new hard ferromagnets and effectively tuning or enhancing the coercivity are the hottest topics in layered magnets today. Here, we report a strain tunability of perpendicular magnetic anisotropy in van der Waals (vdW) ferromagnets VI3 using magnetic circular dichroism measurements. For an unstrained flake, the M-H curve shows a rectangular-shaped hysteresis loop with perpendicular magnetic anisotropy and a large coercivity (up to 1.775 T at 10 K). Furthermore, the coercivity can be enhanced to a maximum of 2.6 T at 10 K under a 2.9% in-plane tensile strain. Our DFT calculations show that the magnetic anisotropy energy (MAE) can be dramatically increased after applying an in-plain tensile strain, which contributes to the enhancement of coercivity in the VI3 flake. Meanwhile, the strain tunability on the coercivity of CrI3, with a similar crystal structure, is limited. The main reason is the strong spin-orbital coupling in V3+ in VI6 octahedra in comparison with that in Cr3+. The strain tunability of coercivity in VI3 flakes highlights its potential for integration into vdW heterostructures, paving the way toward nanoscale spintronic devices and applications in the future. Copyright © 2022, The Authors. All rights reserved.

关键词： Coercive force

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