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Nanostructured steels for advanced structural applications

materials Futures 2022年第1期1卷 97-100页

作者： H J Kong T Yang T L Zhang B X Cao C T Liu Department of Mechanical Engineering Department of Material Science and EngineeringHong Kong Institute for Advanced StudyCity University of Hong KongHong KongPeople’s Republic of China

This vision summarizes the recent advancement of nanostructured steels foradvanced structural applications, foresees possible challenges and pinpoints futuredirections as well as opportunities in this new era of indus... 详细信息

关键词： nanostructured steels extreme environments advanced manufacturing shape memory

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Super-Resolution Displacement Spectroscopic Sensing over a Surface“Rainbow”

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engineering 2022年第10期17卷 75-81页

作者： Lyu Zhou Nan Zhang Chang Chieh Hsu Matthew Singer Xie Zeng Yizheng Li Haomin Song Josep Jornet Yun Wu Qiaoqiang Gan Department of Electrical Engineering The State University of New York at BuffaloBuffaloNY 14260USA Department of Biomedical Engineering The State University of New York at BuffaloBuffaloNY 14260USA Department of Electrical and Computer Engineering Northeastern UniversityBostonMA 02115USA Material Science Engineering Program King Abdullah University of Science and TechnologyThuwal 23955-6900Saudi Arabia

Subwavelength manipulation of light waves with high precision can enable new and exciting applications in spectroscopy,sensing,and medical *** these applications,miniaturized spectrometers are desirable to enable the on-chip analysis of spectral *** particular,for imaging-based spectroscopic sensing mechanisms,the key challenge is to determine the spatial-shift information accurately(i.e.,the spatial displacement introduced by wavelength shift or biological or chemical surface binding),which is similar to the challenge presented by super-resolution ***,we report a unique"rainbow"trapping metasurface for on-chip spectrometers and *** with super-resolution image processing,the low-setting 4×optical microscope system resolves a displacement of the resonant position within 35 nm on the plasmonic rainbow trapping metasurface with a tiny area as small as0.002 *** unique feature of the spatial manipulation of efficiently coupled rainbow plasmonic resonances reveals a new platform for miniaturized on-chip spectroscopic analysis with a spectral resolution of 0.032 nm in wavelength *** this low-setting 4×microscope imaging system,we demonstrate a biosensing resolution of 1.92×109exosomes per milliliter for A549-derived exosomes and distinguish between patient samples and healthy controls using exosomal epidermal growth factor receptor(EGFR)expression values,thereby demonstrating a new on-chip sensing system for personalized accurate bio/chemical sensing applications.

关键词： Rainbow trapping Metasurface Surface plasmon polaritons Super-resolution displacement On-chip biosensing

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Understanding of degradation process by voltage-sweep loop method in exciplex host-based phosphorescent organic light-emitting diodes

Understanding of degradation process by voltage-sweep loop m...

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SID International Symposium Digest of Technical Papers, 2023

作者： Lee, Hakjun Kim, Taekyung Department of Information Display Hongik University Seoul04066 Korea Republic of Department of Material Science and Engineering Hongik University Sejong30016 Korea Republic of

We analyzed the degradation mechanism by deteriorating the exciplex host-based phosphorescent organic light-emitting diodes (PhOLEDs) while repeatedly applying voltages in the range of several nA to mA. To identify the most significant degradation factors represented by bleaching, quenching, and charge imbalance, the degradation process was described from various perspectives by the capacitance (C)-voltage (V) curves (CV), and magneto-electroluminescence (MEL). Comparing the MEL of the non-doped and the doped devices, the bleaching of the dopant was confirmed as degradation progressed. Since the highest occupied molecular orbital (HOMO) of the dopant aligns with that of the hole-transporting layer, the injected holes are easily trapped. As a result, the trap-induced Shockley-Read Hall recombination became dominant. Thus, it was identified that the bleaching of the dopant itself acts as the major degradation factor. © 2023, John Wiley and Sons Inc. All rights reserved.

关键词： Degradation

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Role of deformations and orientation effects in binary and ternary decay of the Cf252 nucleus

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Physical Review C 2024年第5期109卷 054607-054607页

作者： Chahat Jindal Manoj K. Sharma Department of Physics and Material Science Thapar Institute of Engineering and Technology Patiala 147004 India

The phenomenon of spontaneous fission, which includes both binary and ternary decay modes, is observed within heavy and superheavy nuclei. Extensive efforts have been made to investigate the binary and ternary decay patterns exhibited by various nuclei belonging to the heavy-mass region. In this context, our study systematically examines the ground-state binary and ternary decay mechanisms of the Cf252 nucleus. To accomplish this, we have used the quantum mechanical fragmentation theory approach. It is known that the orientation angles of the decaying fragments play an important role in mass distribution. Therefore, in the present work probable orientation (both optimum and fixed) effects with deformations (up to quadrupole β2) of nuclei participating in the fragmentation process are taken into account. Further, the fission fragments for binary (A1+A2) and for ternary (A1+A2+A3) decay processes are identified by selecting channels of local minima in the fragmentation potential, with the third fragment A3 being He4 for the ternary fission. The inclusion of hot-compact/(90∘−90∘)/(0∘−90∘)/(90∘−0∘) orientations leads to the emergence of symmetric fission fragments, where shell effects are found to play the key role, whereas the cold-elongated/(0∘−0∘) leads to the participation of highly deformed nuclei with large mass asymmetry. In addition to this, two types of tripartition of the radioactive nucleus are considered: equatorial cluster tripartition and collinear cluster tripartition. Both configurations are studied by considering A3 = Mg30 and Ca48 as fixed fragments. The most probable fragments in the exit channel [Ni72(Z=28, N=44) + Sn132(Z= 50, N= 82)+Ca48(Z=20, N=28)] indicate that the deformations and the proton/neutron shell closure play a vital role in the spontaneous fission analysis of binary and ternary channels. The calculated results are aligned with available experimental data. In addition to this, relative yield for different ternary combinations is calcul

关键词： Alpha decay Fission Heavy-particle decays Models & methods for nuclear reactions Nuclear reactions A ≥ 220

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Preparation and microwave absorption performance study of high-entropy MAX phase (Ti1/4V1/4Zr1/4Nb1/4)2AlC

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Ceramics International 2025年第17期51卷 23760-23771页

作者： Wang, Shuaiqian Miao, Baoji Nadeem, Muhammad Shahid He, Huaizhi Zhao, Yao Yasir, Muhammad Chen, Qiuling Liu, Guoqin Bai, Jinbo Henan International Joint Laboratory of Nano-Photoelectric Magnetic Material School of Materials Science and Engineering Henan University of Technology Zhengzhou450001 China Department of Materials Science & Engineering Institute of Space Technology Islamabad Pakistan LMPS - Laboratoire de Mécanique Paris-Saclay Université Paris-Saclay Centrale Supélec ENS Paris-Saclay CNRS Gif-sur-Yvette 91190 France

This study successfully prepared a novel high-entropy MAX phase (Ti1/4V1/4Zr1/4Nb1/4)2AlC and conducted a comprehensive investigation of its microwave absorption performance. The material was synthesized using a pressure less sintering method, and by optimizing the selection of raw materials and synthesis processes, high purity, and excellent microwave absorption performance were achieved. The composition, structure, morphology, and electromagnetic parameters of the material were analyzed in detail using characterization methods such as XRD, SEM, EDS, TEM, XPS, and vector network analyzer (VNA). Experimental results exhibit that (Ti1/4V1/4Zr1/4Nb1/4)2AlC can achieve a lowest RL of −62.56 dB at a thickness of 2.25 mm with frequency of 13.26 GHz, demonstrating outstanding microwave absorption capabilities. The study also explored the microwave absorption mechanisms of grown material, including conductivity, dipole polarization relaxation processes, internal lattice defects, and magnetic loss. This research not only delivers new approaches and development of effective microwave absorption materials but also lays the foundation for subsequent studies on MXene and more multi-element high-entropy MAX phase materials. © 2025 Elsevier Ltd and Techna Group S.r.l.

关键词： Sintering

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Metal-organic frameworks (MOFs) in aqueous batteries (ABs):unlocking potential through innovative materials design

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science China Chemistry 2025年

作者： Bo Han Erhai Hu Bei-Er Jia Ziyang Liu Shuen Tso Afriyanti Sumboja Ivandini T.Anggraningrum Anne Zulfia Syahrial Qingyu Yan SCARCE Laboratory Energy Research Institute NTU (ERIN) Nanyang Technological University School of Materials Science and Engineering Nanyang Technological University Material Science and Engineering Research Group Faculty of Mechanical and Aerospace Engineering Institut Teknologi Bandung Department of Chemistry University of Indonesia Metallurgical & Materials Engineering Department Fakultas Teknik Universitas Indonesia

Metal-organic frameworks (MOFs) represent a revolutionary class of materials in the field of energy storage,particularly for aqueous batteries (ABs).Distinguished by their large surface area,tuneable porosity,and adaptable chemical activity,MOFs offer significant advantages over conventional materials in battery *** article provides a thorough analysis of the crucial role that MOFs play in improving the efficiency of *** includes a concise review of the current research progress,emphasizing the fundamental processes by which MOFs enhance electrochemical ***,the review examines the synthesis and design strategies for the structure of MOFs to maximize ion transport,improve conductivity,and enhance *** structural advantages,chemical versatility,stability,durability and functionalization potential of MOFs are comprehensively ***,we explore the distinct advantages of MOFs in overcoming common challenges encountered in ABs,such as declining capacity,inadequate cycling stability,and limited energy *** paper also highlights the future research directions needed to fully harness their *** goal is to develop a fundamental understanding and stimulate further progress in the use of MOFs for advanced energy storage solutions.

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High-Quality Single Crystal of Kitaev Spin Liquid Candidate material RuBr_(3) Synthesized under High Pressure

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Chinese Physics Letters 2025年第2期42卷 249-254页

作者： Bowen Zhang Xiangjun Li Limin Yan Wenbo Li Nana Li Jianfa Zhao Xiaobing Liu Shun-Li Yu Zhiwei Hu Wenge Yang Runze Yu Center for High-Pressure Science and Technology Advanced Research Beijing 100093China Laboratory of High-Pressure Physics and Material Science School of Physics and Physical EngineeringQufu Normal UniversityQufu 273165China Institute of Physics Chinese Academy of SciencesBeijing 100190China National Laboratory of Solid-State Microstructures and Department of Physics Nanjing UniversityNanjing 210093China Max-Planck Institute for Chemical Physics of Solids Dresden 01187Germany

Kitaev quantum spin liquids have attracted significant attention in condensed matter physics over the past *** understand their emergent quantum phenomena,high-quality single crystals of substantial size are ***,we report the synthesis of single crystals of the Kitaev quantum spin liquid candidate RuBr_(3),achieving millimeter-sized crystals through a self-flux method under high pressure and high temperature *** crystals exhibit well-defined cleavage planes with a lustrous *** characterizations exhibit a narrow band-gap semiconducting behavior with 0.13 eV and 0.11 eV band-gap in ab plane and along𝑐axis,*** measurement shows a transition to antiferromagnetic(AFM)state at approximately 29K both in ab plane and along the c ***,the N′eel temperature increases to 34K with an applied magnetic field of up to 7T in the ab plane,but without any change along𝑐*** large size and high quality of RuBr3 single crystals provide a valuable platform for investigating various interactions,particularly the Kitaev interaction,and for elucidating the intrinsic physical properties of Kitaev quantum spin liquids.

关键词： quantum narrow sized

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Rare earth lanthanum pinning effect for corrosion resistance ultraefficient microwave absorption FeCo@rGO composites

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Journal of materials science & Technology 2024年第10期177卷 181-190页

作者： Junru Yao Jintang Zhou Lu Lu Feng Yang Zhengjun Yao Bo Ouyang Erjun Kan Yuxin Zuo Renchao Che Fan Wu College of Materials Science and Technology Nanjing University of Aeronautics and AstronauticsNanjing 211100China Ministry of Industry and Information Technology Key Laboratory of Material Preparation and Protection for Harsh Environment(Nanjing University of Aeronautics and Astronautics)Nanjing 211100China MIIT Key Laboratory of Semiconductor Microstructure and Quantum Sensing School of ScienceNanjing University of Science and TechnologyNanjing 210094China School of Chemistry and Chemical Engineering Anhui UniversityHefei 230601China Laboratory of Advanced Materials Shanghai Key Lab of Molecular Catalysis and Innovative MaterialsDepartment of Materials ScienceFudan UniversityShanghai 200438China School of Mechanical Engineering Nanjing University of Science and TechnologyNanjing 210094China

Magnetic metal absorbers exhibit remarkable microwave absorption ***,their practical application is severely limited due to their susceptibility to corrosion,particularly in marine *** address this challenge,we propose a novel approach involving the modification and control of FeCo/rGO microwave absorbers using rare earth lanthanum(La).This strategy aims to achieve both high-performance microwave absorption and enhanced resistance to marine *** this study,we employ a La_(2)O_(3) modifying control strategy to refine the FeCo magnetic particles and coat them with CoFe_(2)O_(4) on the surface,leveraging the pinning effect of in situ generated La_(2)O_(3) .This process enhances the interface polarization of the absorbers,thereby improving their electromagnetic performance and ma-rine corrosion ***,the La_(2)O_(3) modified FeCo@rGO composites exhibit broadband ab-sorption,covering a wide frequency range of 6.11 GHz at 1.55 ***,the electromagnetic proper-ties of the La_(2)O_(3) modified FeCo@rGO absorbers remain stable even after prolonged exposure to a 3.5 wt% NaCI solution,simulating marine conditions,for at least 15 ***,we perform first-principle calculations on FeCo and FeCo-O to validate the corrosion resistance of the La_(2)O_(3) modified FeCo@rGO composites at the atomic *** comprehensive investigation explores the control of rare earth lan-thanum modification on the size of magnetic metal particles,enabling efficient electromagnetic wave absorption and marine corrosion *** results of this study provide a novel and facile strategy for the control of microwave absorbers,offering promising prospects for future research and development in this field.

关键词： Rare earth lanthanum FeCo@rGO Microwave absorption Marine corrosion resistance

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CALPHAD coupled phase-field simulation of microstructural evolution during active metal brazing with Ag-Cu-Sn-Ti alloy 28

CALPHAD coupled phase-field simulation of microstructural ev...

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28th Congress of the International Federation for Heat Treatment and Surface engineering, IFHTSE 2023

作者： Morino, Takumi Hirosawa, Shoichi Ode, Machiko Abe, Taichi Mori, Yoichiro Suenaga, Seiichi Department of Mechanical Engineering and Materials Science Yokohama National University 79-5 Tokiwadai Hodogaya-ku Kanagawa Yokohama240-8501 Japan Computational Material Science Center National Institute of Material Science Ibaraki Tsukuba305-0047 Japan Toshiba Materials Corporation Kanagawa Yokohama235-8522 Japan

ISBN: (纸本)9781713889533

In this study, a new CALPHAD database of Ag-Cu-Sn-Ti system has been proposed, followed by a phase-field simulation to predict the solidification microstructure of the quaternary alloy during active metal brazing that joins copper circuits and Si3N4 substrates. From the CALPHAD coupled phase-field simulation, it was revealed that melting of copper circuit and a reaction of Ti with Si3N4 substrate decreases the amount of primary Sn3Ti5, resulting in an increased Sn concentration within Ag-Cu-Sn-Ti liquid and thus a lowering of the temperature at which solidification of the brazing metal is completed. Therefore, the developed phase-field program of our own coding can successfully clarify the effect of copper circuit melting and Ti depletion during active metal brazing, which cannot be experimentally monitored. © 2023 28th IFHTSE 2023 Congress. All rights reserved.

关键词： Tin alloys

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Crown ether interlayer-modulated polyamide membrane with nanoscale structures for efficient desalination

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Nano Research 2023年第5期16卷 6153-6159页

作者： Yanyu Zhao Xiangju Song Minghua Huang Heqing Jiang Arafat Toghan School of Materials Science and Engineering Ocean University of ChinaQingdao 266100China Qingdao Key Laboratory of Functional Membrane Material and Membrane Technology Qingdao Institute of Bioenergy and Bioprocess TechnologyChinese Academy of SciencesQingdao 266101China Chemistry Department College of ScienceImam Mohammad Ibn Saud Islamic University(IMSIU)Riyadh 11623Saudi Arabia Chemistry Department Faculty of ScienceSouth Valley UniversityQena 83523Egypt

Nanoscale thin-film composite(TFC)polyamide membranes are highly desirable for desalination owing to their excellent separation *** is a permanent pursuit to further improve the water flux of membrane without deteriorating the salt ***,we fabricated a high-performance polyamide membrane with nanoscale structures through introducing multifunctional crown ether interlayer on the porous substrate impregnated with *** crown ether interlayer can reduce the diffusion of amine monomers to reaction interface influenced by its interaction with m-phenylenediamine and the spatial shielding effect,leading to a controlled interfacial polymerization(IP)***,crown ether with intrinsic cavity is also favorable to adjust the IP process and the microstructure of polyamide *** the outer surface of the nanocavity is lipophilic,crown ether has good solvency with the organic phase,thus attracting more trimesoyl chloride molecules to the interlayer and promoting the IP reaction in the confined *** a result,a nanoscale polyamide membrane with an ultrathin selective layer of around 50 nm is *** optimal TFC polyamide membrane at crown ether concentration of 0.25 wt.%exhibits a water flux of 61.2 L·m^(−2)·h^(−1),which is 364%of the pristine TFC membrane,while maintaining a rejection of above 97%to *** development of the tailor-made nanoscale polyamide membrane via constructing multifunctional crown ether interlayer provides a straightforward route to fabricate competitive membranes for highly efficient desalination.

关键词： polyamide membrane nanoscale structures crown ether interlayer confined polymerization reverse osmosis

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