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arXiv 2024年

作者： Chen, Xiaowen Adam, Roman Bürgler, Daniel E. Wang, Fangzhou Lu, Zhenyan Pan, Lining Heidtfeld, Sarah Greb, Christian Liu, Meihong Liu, Qingfang Wang, Jianbo Schneider, Claus M. Cao, Derang College of Physics Qingdao University Qingdao266071 China National Demonstration Center for Experimental Applied Physics Education Qingdao University Qingdao266071 China Spin-X Institute South China University of Technology Guangzhou511442 China Peter Grünberg Institute Forschungszentrum Jülich Jülich52425 Germany Hunan Provincial Key Laboratory of Intelligent Sensors and Advanced Sensor Materials School of Physics and Electronics Hunan University of Science and Technology Xiangtan411201 China CAS Key Laboratory of Magnetic Materials and Devices Ningbo Institute of Materials Technology and Engineering Chinese Academy of Sciences Ningbo315201 China Key Laboratory for Magnetism and Magnetic Materials of Ministry of Education Lanzhou University Lanzhou730000 China Key Laboratory of Special Functional Materials and Structural Design Ministry of Education Lanzhou University Lanzhou730000 China Faculty of Physics University of Duisburg-Essen Duisburg47057 Germany Department of Physics University of California Davis DavisCA95616-5270 United States

Since the discovery of ultrafast demagnetization in Ni thin films in 1996, laser-induced ultrafast spin dynamics have become a prominent research topic in the field of magnetism and spintronics. This development offers new possibilities for the advancement of spintronics and magnetic storage technology. The subject has drawn a substantial number of researchers, leading to a series of research endeavors. Various models have been proposed to elucidate the physical processes underlying laser-induced ultrafast spin dynamics in ferromagnetic materials. However, the potential origins of these processes across different material systems and the true contributions of these different origins remain challenging in the realm of ultrafast spin dynamics. This predicament also hinders the development of spintronic terahertz emitters. In this review, we initially introduce the different experimental methods used in laser-induced ultrafast spin dynamics. We then systematically explore the magnetization precession process and present seven models of ultrafast demagnetization in ferromagnetic materials. Subsequently, we discuss the physical processes and research status of four ultrafast demagnetization origins (including spin-flipping, spin transport, non-thermal electronic distribution, and laser-induced lattice strain). Since attosecond laser technique and antiferromagnetic materials exhibit promising applications in ultrahigh-frequency spintronics, we acknowledge the emerging studies used by attosecond pules and studies on ultrafast spin dynamics in antiferromagnets, noting the significant challenges that need to be addressed in these burgeoning field. © 2024, CC BY.

关键词： Spin dynamics

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Atomic-Scale Tracking Phase Transition Dynamics of Berezinskii-Kosterlitz-Thouless Polar Vortex-Antivortex

arXiv

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arXiv 2023年

作者： Zhu, Ruixue Zheng, Sizheng Li, Xiaomei Wang, Tao Tan, Congbing Yu, Tiancheng Liu, Zhetong Wang, Xinqiang Li, Jiangyu Wang, Jie Gao, Peng Electron Microscopy Laboratory School of Physics Peking University Beijing100871 China International Center for Quantum Materials School of Physics Peking University Beijing100871 China Department of Engineering Mechanics Zhejiang University Zhejiang Hangzhou310027 China Hunan Provincial Key Laboratory of Intelligent Sensors and Advanced Sensor Materials School of Physics and Electronics Hunan University of Science and Technology Hunan Xiangtan411201 China State Key Laboratory of Artificial Microstructure and Mesoscopic Physics School of Physics Peking University Beijing100871 China Guangdong Provincial Key Laboratory of Functional Oxide Materials and Devices Southern University of Science and Technology Guangdong Shenzhen518055 China School of Integrated Circuits East China Normal University Shanghai200241 China Zhejiang Laboratory Hangzhou311100 China Collaborative Innovation Centre of Quantum Matter Beijing100871 China

Particle-like topologies, such as vortex-antivortex (V-AV) pairs, have garnered significant attention in the field of condensed matter. However, the detailed phase transition dynamics of V-AV pairs, as exemplified by self-annihilation, motion, and dissociation, have yet to be verified in real space due to the lack of suitable experimental techniques. Here, we employ polar V-AV pairs as a model system and track their transition pathways at atomic resolution with the aid of in situ (scanning) transmission electron microscopy and phase field simulations. We demonstrate the absence of a Berezinskii-Kosterlitz-Thouless phase transition between the room-temperature quasi-long-range ordered ground phase and the high-temperature disordered phase. Instead, we observe polarization suppression in bound V-AV pairs as the temperature increases. Furthermore, electric fields can promote the vortex and antivortex to approach each other and annihilate near the interface. The elucidated intermediate dynamic behaviors of polar V-AV pairs under thermal- and electrical-fields lay the foundation for their potential applications in electronic devices. Moreover, the dynamic behaviors revealed at atomic scale provide us new insights into understanding topological phase of matter and their topological phase transitions. © 2023, CC BY.

关键词： Scanning electron microscopy

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Mapping the Antiparallel Aligned Stripe Domain Rotation by Microwave Excitation

SSRN

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SSRN 2024年

作者： Zhang, Jing Cui, Yuanzhi Wang, Xiaoyu Wang, Chuang Liu, Mengchen Xu, Jie Li, Kai Zhao, Yunhe Lu, Zhenyan Pan, Lining Jin, Chendong Liu, Qingfang Wang, Jianbo Wang, Fangzhou Adam, Roman Schneider, Claus Michael Cao, Derang College of Physics Qingdao University Qingdao266071 China National Demonstration Center for Experimental Applied Physics Education Qingdao University Qingdao266071 China SKLSM Institute of Semiconductors Chinese Academy of Sciences Beijing100083 China College of Chemistry Chemical Engineering and Resource Utilization Northeast Forestry University Harbin150040 China Hunan Provincial Key Laboratory of Intelligent Sensors and Advanced Sensor Materials School of Physics and Electronics Hunan University of Science and Technology Xiangtan411201 China CAS Key Laboratory of Magnetic Materials and Devices Ningbo Institute of Materials Technology and Engineering Chinese Academy of Sciences Ningbo315201 China Hebei University China Key Laboratory of Special Functional Materials and Structural Design Ministry of Education Lanzhou University Lanzhou730000 China Key Laboratory of Optic-Electronic Information and Materials of Hebei Province Research Center for Computational Physics College of Physics Science and Technology Hebei University Baoding071002 China Peter Grünberg Institute Forschungszentrum Jülich Jülich52425 Germany Faculty of Physics University of Duisburg-Essen Duisburg47057 Germany Department of Physics University of California Davis DavisCA95616-5270 United States

The evolution process of magnetic domains to external fields is crucial for the modern understanding and application of spintronics. In this study, we investigated the domain rotation of antiparallel-aligned stripe domains through their response to microwave excitation. The excitation was conducted in four orientations defined by the microwave field, magnetic field, and stripe direction, allowing for a comprehensive characterization of the domain's evolution. Our results, which are reproducible and consistent with micromagnetic simulations, provide additional approaches and techniques for comprehending the microscopic mechanisms of magnetic domains and characterizing their rotation. © 2024, The Authors. All rights reserved.

关键词： Magnetic domains

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Porous Ti-10Mo alloy fabricated by powder metallurgy for promoting bone regeneration

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Science China Materials 2019年第7期62卷 1053-1064页

作者： Wei Xu Zhuo Liu Xin Lu Jingjing Tian Gang Chen Bowen Liu Zhou Li Xuanhui Qu Cuie Wen Beijing Advanced Innovation Center for Materials Genome Engineering University of Science and Technology Beijing Beijing 100083 China CAS Center for Excellence in Nanoscience Beijing Key Laboratory of Micro-nano Energy and Sensor Beijing Institute of Nanoenergy and Nanosystems Chinese Academy of Sciences Beijing 100083 China Beijing Advanced Innovation Center for Materials Genome Engineering Institute for Advanced Materials and Technology University of Science and Technology Beijing Beijing 100083 China School of Engineering RMIT University Melbourne 3001 Australia

Porous Ti-lOMo alloys were fabricated by powder metallurgy using a space-holder method. The pore characteristics, m icrostructure, mechanical properties, in vitro biocompatibility, and in vivo osseointegration of the fabricated alloys were systematically investigated. The results show that with different weight ratios of the space-holder (NH4- HC03) added, all of the porous Ti-10Mo alloys sintered at 1,300℃ exhibited a typical W idmanstatten microstructure. The porosity and average pore size of the porous structures can be controlled in the range of 50.8%-66.9% and 70.1 -381.4μm , respectively. The Ti-10Mo alloy with 63.4% porosity exhibited the most suitable mechanical properties for implant applications with an elastic modulus of 2.9 GPa and a compressive yield strength of 127.5 MPa. In vitro9 the alloyconditioned medium showed no deleterious effect on the cell proliferation. The cell viability in this medium was higher than that of the reference group, suggesting non-toxicity and good biological characteristics of the alloy specimens. In vivo, after eight weeks* implantation, new bone tissue formed surrounding the alloy implants, and no noticeable inflammation was observed at the implantation site. The bone bonding strength of the porous Ti-10Mo alloy increased over time from 46.6N at two weeks to 176.4 N at eight weeks. Suitable mechanical properties together with excellent biocompatibility in vitro and osteointegration in vivo make the porous Ti-10Mo fabricated by powder metallurgy an attractive orthopedic implant alloy.

关键词： porosity powder metallurgy structure characterization cell cytotoxicity osteointegration

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Corrigendum to “Scalable molten salt strategy synthesis of large-size 2D MoS 2(1-x) Se 2x alloy for boosting potassium-ion storage performance” [Mater. Today Chem. 38 (2024) 102044]

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Materials Today Chemistry 2024年 39卷

作者： Jing Li Lei Yang Tianxiang Liang Hui Wei Honglin Li Feng Hu Jinpei Hei Yefeng Liu Nannan Wang Hehe Wei Engineering Research Center of High-frequency Soft Magnetic Materials and Ceramic Powder Materials of Anhui Province Engineering Technology Research Center of Preparation and Application of Industrial Ceramics of Anhui Province School of Chemistry and Material Engineering Chaohu University 1 Bantang Road Hefei 238000 PR China Key Laboratory of Biomimetic Sensor and Detecting Technology of Anhui Province School of Materials and Chemical Engineering West Anhui University Lu'an Anhui 237012 PR China Key Laboratory for Advanced Materials Center for Computational Chemistry and Research Institute of Industrial Catalysis East China University of Science and Technology 130 Meilong Road Shanghai 200237 PR China

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Angle Independent Fano Resonances in Bioinspired Nanostructured Fabry-Pérot sensors

Angle Independent Fano Resonances in Bioinspired Nanostructu...

引用

Pacific Rim Conference on Lasers and Electro-Optics (CLEO/Pacific Rim)

作者： Daniel Assumpcao Radwanul Siddique Vinayak Narasimhan Hyuck Choo 1200 E. California Blvd. MC 136-93 California Institute of Technology Pasadena California USA Image Sensor Lab Samsung Advanced Institute of Technology (SAIT) Samsung Semiconductor Inc. 2 N Lake Ave #240Pasadena CA USA Device Lab Device & System Research Center Samsung Advanced Institute of Technology (SAIT) Suwon Republic of Korea

The utility of Fabry-Pérot based optical sensors is limited by their poor readout angle. We numerically demonstrate that adding bioinspired short-range-order nanostructuring to these devices leads to angle-indepe... 详细信息

ISBN: (数字)9781728143330

ISBN: (纸本)9781728152394

关键词： Nanopatterning Interference Lasers and electrooptics Biomembranes Nanoscale devices Fabry-Perot Optical sensors

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Electrochemical formation of ‘synthetic receptors’ based on conducting polymers

Electrochemical formation of ‘synthetic receptors’ based o...

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International Conference on Nanomaterials in Biomedical Application and Biosensors, NAP 2019

作者： Ramanavicius, A. Tereshchenko, A. Plikusiene, I. Ratautaite, V. Deshmukh, M.A. Smyntyna, V. Oztekin, Ya. Bubniene, U. Ramanaviciene, A. Department of Physical Chemistry Faculty of Chemistry and Geosciences Vilnius University Vilnius Lithuania Laboratory of Nanotechnology State Research Institute Center for Physical Sciences and Technology Vilnius Lithuania Faculty of Chemistry and Geosciences NanoTechnas-Centre of Nanotechnology and Material Science Vilnius University Vilnius Lithuania Department of Experimental Physics Faculty of Mathematics Physics and Information Technologies Odesa I.I. Mechnikov National University Odesa Ukraine Department of Physics RUSA-Center for Advanced Sensor Technology Dr. Babasaheb Ambedkar Marathwada University AurangabadMaharashtra431 004 India Faculty of Science Department of Chemistry Selcuk University Konya Turkey

ISBN: (纸本)9789811539954

Analysis of pharmaceuticals and biologically active materials recently can be performed by biosensors, which can be based on conducting polymers. Therefore, in this Mini Review some achievements in the synthesis and application of conducting polymer—polypyrrole (Ppy), which is often used in the design of sensors and biosensors, are overviewed. Some perspective methods of conducting polymer synthesis are outlined. Significant attention has been paid to electrochemical, chemical and biochemical synthesis of conducting polymers (CPs), which were developed by authors. The applicability of polypyrrole based functional layers in the design of electrochemical biosensors is overviewed. The adaptability of enzyme— glucose oxidase (GOx), which can be applied as (i) biological recognition element— in the design of glucose biosensors, (ii) a biocatalyst—in the synthesis of some above mentioned conducting polymers, is discussed. Part of biocompatibility related aspects of some conducting polymers are also discussed and some insights in the application of polypyrrole-based coatings for implantable sensors are outlined. © Springer Nature Singapore Pte Ltd. 2020.

关键词： Conducting polymers

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The first technology can compete with piezoelectricity to harvest ultrasound energy for powering medical implants

引用

Science Bulletin 2019年第21期64卷 1565-1566页

作者： Han Ouyang Zhou Li CAS Center for Excellence in Nanoscience Beijing Key Laboratory of Micro-Nano Energy and SensorBeijing Institute of Nanoenergy and NanosystemsChinese Academy of SciencesBeijing 100083China Beijing Advanced Innovation Centre for Biomedical Engineering Key Laboratory for Biomechanics and Mechanobiology of Ministry of EducationSchool of Biological Science and Medical EngineeringBeihang UniversityBeijing 100083China School of Nanoscience and Technology University of Chinese Academy of SciencesBeijing 100049China Center on Nanoenergy Research School of Physical Science and Technology Guangxi UniversityNanning 530004China

Sustainable operation of implanted medical devices is essential for clinic ***,limited battery capacity is a key challenge for most implantable medical electronics[1].Higher-capacity battery is not an ideal choice,because battery capacity is usually linearly dependent on battery volume[2].New energy harvesters have been developed as promising alternative solutions,which extracted energy from the ambient environment and biosystem for powering implantable devices[3],However,the energy reclaimed from body and ambient environment also have power lim让ation,such as thermal gradient and bioelectric *** ultrasound or RF energy into the body and generate electrical power by a converter is a reliable solution.

关键词： battery power ambient

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Development and application of nanogenerators in humanoid robotics

Nano Trends

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Nano Trends 2023年 3卷

作者： Xuecheng Qu Ze Yang Jia Cheng Zhou Li Linhong Ji State Key Laboratory of Tribology in Advanced Equipment Department of Mechanical Engineering Tsinghua University Beijing 100084 China CAS Center for Excellence in Nanoscience Beijing Key Laboratory of Micro-nano Energy and Sensor Beijing Institute of Nonenergy and Nanosystems Chinese Academy of Sciences Beijing 101400 China School of Nanoscience and Technology University of Chinese Academy of Sciences Beijing 100049 China

Nanogenerators have garnered significant attention in the field of robotics due to their high performance, ease of design and fabrication, and lightweight nature. By utilizing such sensing systems, machines can be endowed with specific sentience capabilities. Moreover, sensors that based on nanogenerators can operate continuously without requiring an external power source. The following paper presents a comprehensive review of recent developments and applications of nanogenerator-based sensors in robotics in recent years. These sensors are categorized according to their sensory functions (including tactile, hearing, smell, vision and displacement, etc.), with a focus on their working mechanisms, materials and structures. Furthermore, this review investigates the usage of these devices in flexible manipulators and human-machine interfaces. Finally, the challenges and opportunities pertaining to nanogenerator-based sensors are discussed.

关键词： Nanogenerator Humanoid sensor Robotics Soft finger Human-machine interaction

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Highly sensitive strain sensor using silver nanowire/poly(3,4-ethylenedioxythiophene): Polystyrene sulfonate coated natural rubber

SPE Polymers

引用

SPE Polymers 2021年第3期2卷 224-232页

作者： Thana, Kittiphong Jaisutti, Rawat Petchsang, Nattasamon Department of Physics Faculty of Science and Technology Thammasat University Pathumthani Thailand Research Unit in Innovative Sensor and Nanoelectronic Devices Thammasat University Pathumthani Thailand Department of Materials Science Faculty of Science Kasetsart University Bangkok Thailand Specialized Center of Rubber and Polymer Materials for Agriculture and Industry (RPM) Faculty of Science Kasetsart University Bangkok Thailand Center for Advanced Studies in Nanotechnology for Chemical Food and Agricultural Industries Kasetsart University Bangkok Thailand

Stretchable strain sensors have attracted much attention for health monitoring systems, human-machine interfaces, and robotics. However, there is still a challenge to develop strain sensors with excellent mechanical stretchability and high strain-sensing region as well as cost-effective fabrication process. Herein, a highly sensitive, reliable and low-cost strain sensors are developed using a resistive transduction of poly(3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS) and silver nanowire (Ag NW). Natural rubber was used as a stretchable substrate material, and a gold leaf was used as electrodes placed between PEDOT:PSS and Ag NW. The electrical resistance of this novel strain sensor shows an average value of 74.72 ± 14.65 Ω with a large sensing range up to 50% strain and sensing sensitivity of 418. The sensing response does not deteriorate after 750 stretching-releasing cycles and the sensor exhibits high stability after storage in air for more than 53 days. Concerning finger and joint movement, the wearable strain sensor demonstrates a stable output signal and distinguishes response under different bending and stretching. These advantages make it potential applications in wearable electronic devices and promising development in healthcare management. © 2021 The Authors. SPE Polymers published by Wiley Periodicals LLC on behalf of Society of Plastics Engineers.

关键词： natural rubber PEDOT:PSS plasma treatment silver nanowires strain sensor

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