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Ferromagnetism triggered by band tripling in ruthenate Sr4Ru3O10

Physical Review B 2024年第15期110卷 155134页

作者： N. Watanabe S. Souma K. Nakayama K. Yamauchi J. F. Ribeiro Y. Wang Miho Kitamura Koji Horiba Hiroshi Kumigashira T. Oguchi Z. Q. Mao Y. P. Chen T. Sato Department of Physics Graduate School of Science Advanced Institute for Materials Research (WPI-AIMR) Center for Science and Innovation in Spintronics (CSIS) Precursory Research for Embryonic Science and Technology (PRESTO) Center for Spintronics Research Network (CSRN) School of Electrical and Computer Engineering and Birck Nanotechnology Center Department of Physics Institute of Materials Structure Science (QST) Sendai 980-8579 Japan Institute of Multidisciplinary Research for Advanced Materials (IMRAM) Department of Physics and Astronomy and Purdue Quantum Science and Engineering Institute International Center for Synchrotron Radiation Innovation Smart (SRIS) Mathematical Science Center for Co-creative Society (MathCCS)

Itinerant ferromagnetism is understood in terms of a quasiparticle picture with renormalized many-body effects. While the ferromagnetic ground state is destabilized by thermal and quantum fluctuations leading to exotic states such as unconventional superconductivity, how the quasiparticles evolve across the ferromagnetic transition is a target of intensive debate. Here, we present a type of ferromagnetic transition that is accompanied by a drastic reconstruction of quasiparticle spectrum in a layered ferromagnetic ruthenate, Sr4Ru3O10. Angle-resolved photoemission spectroscopy uncovered that the three-dimensional coherent states below the ferromagnetic transition temperature (TC) turn into two-dimensional incoherent electronic states slightly above TC characterized by the disappearance of trilayer band splitting, ferromagnetic exchange splitting, and long-lived quasiparticles. Our findings suggest that the electronic coherence strongly modifies the fermiology and magnetic order, pointing to an intriguing coupling between quasiparticles and magnetic properties.

关键词： Electronic structure Fermi surface Ferromagnetism Quasiparticles & collective excitations van Hove singularity Ruddlesden-Popper compounds Angle-resolved photoemission spectroscopy Density functional theory First-principles calculations

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Optimizing Different Methods of Fabricating 3D Printed UV Blocking Sheets for Solar Cells

Optimizing Different Methods of Fabricating 3D Printed UV Bl...

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Renewable Energy Technologies and Modern Communications Systems: Future and Challenges, Conference on

作者： Amjad Fawzi Alhindi Lujain Khalid Baawad Fahad Allam Nazek Elatab Rabab R. Bahabry Smart Advanced Memory Devices and Applications (SAMA) Laboratory Electrical and Computer Engineering Computer Electrical Mathematical Science and Engineering King Abdullah University of Science and Technology (KAUST) Thuwal Saudi Arabia Materials Science and Engineering Department King Fahd University of Petroleum and Minerals Dhahran Saudi Arabia Department of Physical Sciences University of Jeddah (UJ) College of Science Jeddah Saudi Arabia

ISBN: (数字)9798331519445

ISBN: (纸本)9798331519452

This study investigates the fabrication of innovative UV-blocking sheets that effectively transmit visible light while simultaneously obstructing harmful ultraviolet (UV) radiation, utilizing Cerium Oxide (CeO2) and Zinc Oxide (ZnO) nanoparticles as UV-blocking agents. Three distinct fabrication methods were explored: The Powder Method, where nanoparticles were incorporated directly into polydimethylsiloxane (PDMS); the Ball milling Mixture method, which involved mixing nanoparticles through ball milling; and the Solvent-Based Mixture method, where nanoparticles were dissolved, mixed, and dried; before incorporation into PDMS. Samples were produced using a 3D printing technique, which is Direct Ink Writing (DIW) and characterized for their optical properties via UV-Vis spectroscopy. The results indicated CeO2 demonstrated superior UV-blocking capabilities (a maximum blockage of ~99%) compared to ZnO, while maintaining high transmittance for visible light (a maximum of ~90%). Notably, the solvent-based method exhibited better results than the ball milling method; however, the powder method had the best results. Therefore, this investigation offers a promising solution for solar panel protection that aligns with Saudi Arabia's Vision 2030 energy objectives. The relentless exposure of devices, particularly solar cells, to harmful UV radiation poses a formidable challenge and leads to annual degradation rates of between -0.8% and -4.9%, besides other factors. These findings underscore the critical importance of developing effective UV-blocking solutions.

关键词： Nanoparticles Powders II-VI semiconductor materials Photovoltaic cells Ink Ball milling Writing Zinc oxide Three-dimensional printing Substrates

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Revealing the Charge Density Wave Caused by Peierls Instability in Two-Dimensional NbSe2

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ACS Materials Letters 2024年第7期6卷 2941-2947页

作者： Lee, Yung-Ting Chen, Po-Tuan Li, Zheng-Hong Wu, Jyun-Yu Kuo, Chia-Nung Lue, Chin Shan Wu, Chien-Te Kuo, Chien-Cheng Chiang, Cheng-Tien Ozaki, Taisuke Lin, Chun-Liang Lee, Chi-Cheng Hsueh, Hung-Chung Chung, Ming-Chiang Department of Electrophysics National Yang Ming Chiao Tung University Hsinchu300093 Taiwan Department of Vehicle Engineering National Taipei University of Technology Taipei10608 Taiwan Department of Physics National Cheng Kung University Tainan City70101 Taiwan Taiwan Consortium of Emergent Crystalline Materials National Science and Technology Council Taipei10601 Taiwan Physics Division National Center for Theoretical Sciences Taipei10617 Taiwan Department of Physics National Sun Yat-sen University Kaohsiung80424 Taiwan Institute of Atomic and Molecular Sciences Academia Sinica Taipei10617 Taiwan Department of Physics Tamkang University Tamsui New Taipei City251301 Taiwan Institute for Solid State Physics The University of Tokyo Kashiwa Chiba277-8581 Japan Center of Advanced Spectroscopy and Smart Inspection for Material Research Tamkang University Tamsui New Taipei City251301 Taiwan Department of Physics National Chung Hsing University Taichung40227 Taiwan Max Planck Institute for the Physics of Complex Systems Nöthnitzer Straße 38 Dresden01187 Germany

The formation of a charge density wave (CDW) in 2D materials caused by Peierls instability is a controversial topic. This study investigates the extensively debated role of Fermi surface nesting in causing the CDW state in 2H-NbSe2 materials. Four NbSe2 structures are identified on the basis of the characteristics in scanning tunneling microscopy images and first-principles simulations. The calculations reveal that an energetically favored filled phase corresponds to Peierls’ description with fully opened gaps at the CDW Brillouin zone boundary, resulting in a drop at the Fermi level in the density of states and scanning tunneling spectroscopy spectra. The electronic susceptibility and phonon instability indicate that the Fermi surface nesting is triggered by two nesting vectors, whereas the involvement of only one nesting vector leads to a so-called stripe phase. This comprehensive study demonstrates that the filled phase of NbSe2 can be categorized as a Peierls instability-induced CDW in two-dimensional systems. © 2024 American Chemical Society.

关键词： Charge density waves

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SCOBY-Cultured Nanocellulose-Chitosan Bioink Reinforced with Kaolin Nanoparticle for Direct 3D Bioprinting of Irregular and Multi-Layered Tissue engineering Scaffolds

SSRN

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SSRN 2023年

作者： Bhattacharyya, Amitava Heo, Junwon Priyajanani, J. Kim, Seon Ho Khatun, Mst Rita Nagarajan, R. Noh, Insup Department of Chemical and Biomolecular Engineering Seoul National University of Science and Technology Seoul01811 Korea Republic of Convergence Institute of Biomedical Engineering and Biomaterials Seoul National University of Science and Technology Seoul01811 Korea Republic of Innovative and Smart Textiles PSG Institute of Advanced Studies Coimbatore641004 India

The nanocellulosic pellicle derived from symbiotic culture of bacteria and yeast (Kombucha SCOBY) is an important biomaterial in tissue engineering. However, this nanocellulosic hydrogel has a highly entangled gel network that needs to be partially modified to improve its processability and extrusion ability for its applications in 3D bioprinting area. To control its mechanical and biological properties for direct 3D bioprinting applications, uniform reinforcement of nanocellulose-interacting polymer and nanoparticles in such prefabricated gel network is essential. In this study, it is partially hydrolyzed with organic acid, and then transformed into 3D bioprintable polyelectrolyte complex with chitosan and kaolin nanoparticle without any chemical cross-linker using a counter-rotating twin screw-driven mobile 3D bioprinter. This bioprinter ensures homogeneity in biomixing of chitosan and kaolin inside the modified nanocellulose network for multi-layered bioprinted scaffolds using extensional shear mechanism. The mixing simulation, mechanical (static, dynamic, and cyclic), 3D bioprinting, and cellular studies support the hypothesis of homogeneous biomixing of kaolin nanoparticle and live cells in this nanocellulose-chitosan polyelectrolyte hydrogel, leading to significant increase in mechanical and biological properties. Combination of SCOBY-cultured nanocellulose-chitosan bioink with kaolin nanoparticle and screw-driven portable extrusion bioprinter demonstrates a new platform for layer-by-layer regeneration of complex tissues with homogeneous cells/particles distribution. © 2023, The Authors. All rights reserved.

关键词： Chitosan

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GUEST EDITORIAL

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China Communications 2023年第2期 3-6页

作者： Yuan Wu Xu Chen Feng Lyu Xianfu Chen Xumin Huang Jie Gao Yueyue Dai Tony Q.S.Quek Yan Zhang the State Key Laboratory of Internet of Things for Smart City University of Macau the Department of Computer and Information Science University of Macau Sun Yat-sen University Sun Yat-sen University Institute of Advanced Networking and Computing Systems Sun Yat-sen University National and Local Joint Engineering Laboratory the School of Computer Science and Engineering Central South University the VTT Technical Research Centre of Finland the School of Automation Guangdong University of Technology the School of Information Technology Carleton University Huazhong University of Science and Technology Singapore University of Technology and Design(SUTD) the IEEE Communications Society Technical Committee on Green Communications and Computing(TCGCC)

With the growing maturity of the advanced edge-cloud collaboration and integrated sensing-communication-computing systems, edge intelligence has been envisioned as one of the enabling technologies for ubiquitous and l...

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Enhanced Adsorbed Proton Supply at Cu-Bi Heterometallic Interfaces for Intermediate Activation in Efficient Electrocatalytic Acetylene Semihydrogenation

SSRN

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SSRN 2025年

作者： Gao, Xing Wang, Shuyue Bai, Rui Zhang, Jian Li, Zhongjian Hou, Yang Lei, Lecheng Yang, Bin Key Laboratory of Biomass Chemical Engineering of Ministry of Education College of Chemical and Biological Engineering Zhejiang University Hangzhou310058 China Institute of Zhejiang University Quzhou Quzhou324000 China Key Laboratory of Special Functional and Smart Polymer Materials Ministry of Industry and Information Technology Department of Advanced Chemical Engineering School of Chemistry and Chemical Engineering Northwestern Polytechnical University Xi’an710072 China

Electrocatalytic semihydrogenation of acetylene to ethylene (ESAE) provides a sustainable approach to remove acetylene impurity from crude ethylene under ambient conditions. However, the key challenge lies in the difficulty of effectively controlling the intermediates states due to competitive hydrogen evolution reaction (HER), which hinders the achievement of a breakthrough in selectivity of ethylene. Herein, we present a bimetallic composite catalyst named CuBiOx, which obtains high selectivity towards ethylene production with a Faradaic efficiency (FE) reaching 97.4% with a current density of 200 mA cm-2. Notably, even in crude ethylene streams, CuBiOx achieves an acetylene conversion rate of 99.8%, underscoring the practical application potential. Through in-situ electrochemical measurements, we demonstrate that the introduction of Bi atoms facilitates easier dissociation of H2O and production of abundant active protons, thereby promoting the formation of key *C2H3 intermediate. Theoretical calculations further reveal that the adsorption of active protons is energetically more favorable at the Cu-Bi heterometallic interface, and the energy barrier for the conversion of *C2H2 to *C2H3 on CuBiOx is significantly lower, promoting the acetylene conversion efficiency. This work showcases the design and application of heterometallic composite catalysts in broader electrocatalytic hydrogenation processes, indicating their transformative potential in various industrial and research contexts. © 2025, The Authors. All rights reserved.

关键词： Acetylene

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Recent development of sustainable self-healable electronic skin applications, a review with insight

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Chemical engineering Journal 2023年 466卷

作者： Benas, Jean-Sébastien Liang, Fang-Cheng Venkatesan, Manikandan Yan, Zhen-Li Chen, Wei-Cheng Han, Su-Ting Zhou, Ye Kuo, Chi-Ching Institute of Organic and Polymeric Materials Research and Development Center of Smart Textile Technology National Taipei University of Technology Taipei10608 Taiwan Institute of Polymer Science and Engineering and Advanced Research Center for Green Materials Science and Technology National Taiwan University Taipei10617 Taiwan Department of Chemical Engineering and Advanced Research Center for Green Materials Science and Technology National Taiwan University Taipei10617 Taiwan College of Electronics and Information Engineering Shenzhen University Shenzhen518060 China Institute for Advanced Study Shenzhen University Shenzhen518060 China

The development of wearable soft electronic skins requires the production of materials with high mechanical flexibility, an inherent self-healing mechanism, and high breathability. Autonomous self-healing mechanisms have been widely investigated to produce materials that can continue operating in hostile environments or after sustaining damage. However, mimicking the functions of natural human skin requires breathability. Given the thermodynamic considerations of the self-healing process and self-healing polymers, achieving porosity in such materials is a major challenge. Electronic skins fabricated through electrospinning have mechanical flexibility, breathability, and high overall performance;however, most electrospun self-healing fibrous materials have an extrinsic healing mechanism. Therefore, the further development of intrinsic healing methods is essential for the maturation of fibrous electronic skin technology. Several challenges must be addressed before the next generation of electronic skin devices can be developed. This review aims to discuss the shortcomings of current electronic skins and suggests several paths for developing fully self-healing and breathable electronic skins for future soft robotics and human–machine interfaces. © 2023 Elsevier B.V.

关键词： Electrospinning

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Epitaxial growth and transport properties of compressively-strained Ba_(2)IrO_(4) films

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Chinese Physics B 2021年第8期30卷 492-495页

作者： Yun-Qi Zhao Heng Zhang Xiang-Bin Cai Wei Guo Dian-Xiang Ji Ting-Ting Zhang Zheng-Bin Gu Jian Zhou Ye Zhu Yue-Feng Nie National Laboratory of Solid State Microstructures College of Engineering and Applied Sciencesand Collaborative Innovation Center of Advanced MicrostructuresNanjing UniversityNanjing 210093China Department of Physics The Hong Kong University of Science and TechnologyClear Water BayKowloonHong KongChina Department of Applied Physics Research Institute for Smart EnergyThe Hong Kong Polytechnic UniversityHung HomKowloonHong KongChina

Ba_(2)IrO_(4) is a sister compound of the widely investigated Sr_(2)IrO_(4) and has no IrO_(6) octahedral rotation nor net canted antiferromagnetic moment,thus it acts as a system more similar to the high-T_(c) *** this work,we synthesize the Ba_(2)IrO_(4) epitaxial films by reactive molecular beam epitaxy and study their crystalline structure and transport properties under biaxial compressive *** resolution scanning transmission electron microscopy and x-ray diffraction confirm the high quality of films with partial strain *** compressive epitaxial strain,the Ba_(2)IrO_(4) exhibits the strain-driven enhancement of the conductivity,consistent with the band gap narrowing and the stronger hybridization of Ir-t_(2g) and O-2p orbitals predicted in the first-principles calculations.

关键词： molecular beam epitaxy iridate oxides epitaxial strain transport properties

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Privacy Preservation by Intermittent Transmission in Cooperative LQG Control Systems

Privacy Preservation by Intermittent Transmission in Coopera...

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Asian Control Conference

作者： Wenhao Lin Yuqing Ni Wen Yang Chao Yang Department of Automation Key Laboratory of Smart Manufacturing in Energy Chemical Process Ministry of Education East China University of Science and Technology Shanghai China Key Laboratory of Advanced Process Control for Light Industry (Ministry of Education) School of Internet of Things Engineering Jiangnan University Wuxi China

ISBN: (数字)9789887581598

ISBN: (纸本)9798331540845

In this paper, we study a cooperative linear quadratic Gaussian (LQG) control system with a single user and a server. In this system, the user runs a process and employs the server to meet the needs of computation. However, the user regards its state trajectories as privacy. Therefore, we propose a privacy scheme, in which the user sends data to the server intermittently. By this scheme, the server's received information of the user is reduced, and consequently the user's privacy is preserved. In this paper, we consider a periodic transmission scheme. We analyze the performance of privacy preservation and LQG control of different transmission periods. Under the given threshold of the control performance loss, a trade-off optimization problem is proposed. Finally, we give the solution to the optimization problem.

关键词： Measurement Privacy Data privacy Networked control systems Trajectory Servers Optimization

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A New Scheme of Amorphous Wire Based Magnetic Sensor Design and Fabrication

A New Scheme of Amorphous Wire Based Magnetic Sensor Design ...

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China Instrument and Control Society (ACCIS), Academic Conference of

作者： Xiaosheng Liu Jun Ji Dong Hou Jingkai Nie Yubiao Huang Bo Zhang State Key Laboratory of Advanced Power Transmission Technology State Grid Smart Grid ResearchInstitute Co. Ltd Beijing China Department of Electrical Engineering New Materials State Grid Smart Grid Research Institute Co.Ltd Beijing China State Grid Anhui Electric Power Co. Ltd Hefei China School of Mathematics and Physics University of Science and Technology Beijing Beijing China

ISBN: (数字)9798350350326

ISBN: (纸本)9798350350333

Amorphous wire shows extremely high giant magnetoresistance effect (GMI) performance comparing with amorphous ribbon and amorphous multilayer film. Thus it is the ideal material for making GMI magnetic senor. However, there are two problems to be solved. One is the amorphous wire is commonly thin (in the range of dozens of microns) and flexible, which leads to the difficulties in operation when fabricating the sensor. The other is it is hard to control the contact resistance when soldering due to the soldering area can't be accurately controlled, which make the inconsistent problem in mass production. For the purpose of easy to manufacturing, a novel amorphous wire based device structure was proposed in this paper. In this new device design, amorphous wire is fixed on the glass substrate, and electrical interconnection between amorphous wire and package was performed by photoresist pattering and electroplating. By this new scheme, two problems mentioned above were solved. Amorphous wire accurately aligned and fixed on a glass wafer by using Through Glass Via (TGV) used as alignment mark and assistant fixing. The electrical interconnection and bonding pads were performed by microelectronic process. Then the fabricated wafer diced into small pieces, which is a combined structure composing of amorphous wire and supporting glass substrate. The glass substrate provides functions of mechanical support and electrical interconnection between amorphous wire and bonding pads. Finally, the signal pick-up coil is wound with enameled wire, evenly wrapped around the outer surface of the combined structured obtained above. This design avoids the deformation and stress accumulation issues that arise from directly winding the signal pick-up coil on the soft and slender amorphous wire, enhancing the manufacturability of the slender and flexible amorphous wire magnetic sensor. The fabricated device was tested, and the results showed that the sensor has good linearity and stability bet

关键词： Coils Performance evaluation Magnetic sensors Windings Glass Contact resistance Microelectronics Wire Bonding Substrates

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