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2024 Conference on Lasers and Electro-Optics/Pacific Rim, CLEO-PR 2024

作者： Choi, Jieun Kim, Pilhan Graduate School of Medical Science and Engineering Korea Advanced Institute of Science and Technology Daejeon34141 Korea Republic of KI for Health Science and Technology Korea Advanced Institute of Science and Technology Daejeon34141 Korea Republic of Graduate School of Nanoscience and Technology Korea Advanced Institute of Science and Technology Daejeon34141 Korea Republic of

We employs real-time intravital confocal microscopy to investigate real-time blood flow and cellular responses in cerebral microinfarction induced by photo-thrombosis. In vivo longitudinal observations of vascular leakage, reduced flow, and brain edema were achieved, providing insights into cerebrovascular dysfunction. © 2024 The Author(s)

关键词： Macroinvertebrates

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Constructing a 700 Wh kg^(-1)-level rechargeable lithium-sulfur pouch cell

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Journal of Energy Chemistry 2023年第1期76卷 181-186,I0005页

作者： Qian Cheng Zi-Xian Chen Xi-Yao Li Li-Peng Hou Chen-Xi Bi Xue-Qiang Zhang Jia-Qi Huang Bo-Quan Li School of Materials Science and Engineering Beijing Institute of TechnologyBeijing 100081China Advanced Research Institute of Multidisciplinary Science Beijing Institute of TechnologyBeijing 100081China Beijing Key Laboratory of Green Chemical Reaction Engineering and Technology Department of Chemical EngineeringTsinghua UniversityBeijing 100084China

Lithium–sulfur(Li–S)batteries are considered as highly promising energy storage devices because of their ultrahigh theoretical energy density of 2600 Wh kg^(-1).The highest practical energy density of Li–S batteries reported at pouch cell level has exceeded 500 Wh kg^(-1),which significantly surpasses that of lithium-ion ***,a 700 Wh kg^(-1)-level Li–S pouch cell is successfully *** pouch cell is designed at 6 Ah level with high-sulfur-loading cathodes of 7.4 mgScm^(-2),limited anode excess(50μm in thickness),and lean electrolyte(electrolyte to sulfur ratio of 1.7 gelectrolyteg^(-1)S).Accordingly,an ultrahigh specific capacity of 1563 m A h g^(-1)is achieved with the addition of a redox comediator to afford a practical energy density of 695 Wh kg^(-1)based on the total mass of all *** pouch cell can operate stably for three cycles and then failed due to rapidly increased polarization at the second discharge *** to failure analysis,electrolyte exhaustion is suggested as the key limiting *** work achieves a significant breakthrough in constructing high-energy-density Li–S batteries and propels the development of Li–S batteries toward practical working conditions.

关键词： Lithium–sulfur batteries Pouch cell High energy density Lithium polysulfides

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Spin-wave reservoir chips with short-term memory for high-speed estimation of external magnetic fields

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Physical Review Applied 2024年第2期22卷 024072页

作者： Sho Nagase Shoki Nezu Koji Sekiguchi Graduate School of Engineering Science Institute of Advanced Science Institute of Multidisciplinary Sciences Faculty of Engineering

The experimental realization of a spin-wave reservoir chip employing ferromagnetic permalloy thin films is presented. The novel device facilitates the interference of three spherical wave-excited surface mode spin waves within a rectangular waveguide via strategically positioned slits, enabling the detection of electrical signals from surface mode spin waves across all four observation antennas. Through the experiments conducted, it is confirmed that the device functions as a one-input, four-output reservoir capable of estimating external magnetic fields. Notably, the results demonstrate the device’s capacity to retain memory up to one step prior in short-term memory tasks, while confirming the effectiveness of spin-wave interference induced by Huygens slits in enhancing nonlinearity, as observed in parity-check tasks. Furthermore, the inclusion of additional detection antennas contributes to improved learning accuracy, highlighting the significant progress achieved by the spin-wave reservoir chip. These findings underscore substantial progress toward practical implementation, with promising avenues for further development and refinement, showing its remarkable ability to process signals at high speeds, even with 0.8-ns pulse sequences.

关键词： Magnetometry Physics of computation Spin waves Devices for digital logic, storage & processing Ferromagnets Nonlinear waves Transition metal alloys Spin wave spectroscopy

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Boosting sulfur redox kinetics by a pentacenetetrone redox mediator for high-energy-density lithium-sulfur batteries

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Nano Research 2023年第6期16卷 8253-8259页

作者： Yan-Qi Peng Meng Zhao Zi-Xian Chen Qian Cheng Yiran Liu Xi-Yao Li Yun-Wei Song Bo-Quan Li Jia-Qi Huang School of Materials Science and Engineering Beijing Institute of TechnologyBeijing 100081China Advanced Research Institute of Multidisciplinary Science Beijing Institute of TechnologyBeijing 100081China Beijing Key Laboratory of Green Chemical Reaction Engineering and Technology Department of Chemical EngineeringTsinghua UniversityBeijing 100084China

Lithium-sulfur(Li-S)battery is considered as a promising energy storage system due to its ultrahigh theoretical energy density of 2,600 Wh·kg^(−1).Redox mediation strategies have been proposed to promote the sluggish sulfur redox ***,the applicability of redox mediators in practical high-energy-density Li-S batteries has seldomly been *** this work,5,7,12,14-pentacenetetrone(PT)is proposed as an effective redox mediator to promote the sulfur redox kinetics under practical working conditions.A high initial specific discharge capacity of 993 mAh·g^(−1) is achieved at 0.1 C with high-sulfur-loading cathodes of 4.0 mgS·cm^(−2)and low electrolyte/sulfur(E/S)ratio of 5μL·mg_(S)^(−1).More importantly,practical Li-S pouch cells with the PT mediator realize an actual initial energy density of 344 Wh·kg^(−1)and cycle stably for 20 cycles wih a high capacity retention of 88%.This work proposes an effective redox mediator and further verifies the redox mediation strategy for practical high-energydensity Li-S batteries.

关键词： lithium-sulfur batteries lithium polysulfides redox mediation sulfur redox kinetics pouch cells

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Enhanced signal-to-noise ratio in magnonic logic gates via dipole coupling

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Physical Review Applied 2024年第3期22卷 034037页

作者： Ryunosuke Hayashi Shoki Nezu Koji Sekiguchi Graduate School of Engineering Science Institute of Advanced Science Institute of Multidisciplinary Sciences Faculty of Engineering

This work presents a significant advancement in spin-wave computing devices utilizing magnetostatic surface spin waves. We demonstrate a micro-Y-shaped waveguide fabricated from yttrium iron garnet with a nanometer thickness. This intricately engineered design enables a novel logic device with two inputs and one output, enabling future cascading of such elements. Electrical measurements on the Y-shaped structure reveal that strategically introduced gaps effectively manipulate spin-wave propagation, as corroborated by detailed micromagnetic simulations. Notably, we achieve robust diagonal spin-wave transmission across 1.2 µm gaps, covering a distance of 120 µm. Furthermore, the gapped device exhibits clear phase-dependent spin-wave interference, surpassing the performance of a conventional Y-shaped design. This phenomenon, confirmed by mapping simulated magnetization components, signifies the potential of dipole-coupled devices for realizing efficient 2-input-1-output magnonic logic elements, laying the groundwork for future development in this field.

关键词： Dipolar interaction Interference & diffraction of light Magnetic coupling Magnons Spin waves Devices for digital logic, storage & processing Magnetic insulators Waveguides

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Spontaneous grain refinement effect of rare earth zinc alloy anodes enables stable zinc batteries

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National science Review 2024年第7期11卷 252-262页

作者： Manjing Chen Yuxiang Gong Yunxiang Zhao Yexin Song Yan Tang Zhiyuan Zeng Shuquan Liang Peng Zhou Bingan Lu Xiaotan Zhang Jiang Zhou School of Materials Science&Engineering Hunan Provincial Key Laboratory of Electronic Packaging and Advanced Functional MaterialsCentral South University Institute of Materials Research Tsinghua Shenzhen International Graduate School Tsinghua University Department of Materials Science and Engineering City University of Hong Kong Hunan Provincial Key Defense Laboratory of High Temperature Wear-Resisting Materials and Preparation Technology Hunan University of Science and Technology School of Physics and Electronics Hunan University School of Chemistry and Materials Science University of Science and Technology of China Suzhou Institute for Advanced Research University of Science and Technology of China

Irreversible interfacial reactions at the anodes pose a significant challenge to the long-term stability and lifespan of zinc（Zn） metal batteries, impeding their practical application as energy storage devices. The plating and stripping behavior of Zn ions on polycrystalline surfaces is inherently influenced by the microscopic structure of Zn anodes, a comprehensive understanding of which is crucial but often overlooked. Herein, commercial Zn foils were remodeled through the incorporation of cerium（Ce）elements via the ‘pinning effect’ during the electrodeposition process. By leveraging the electron-donating effect of Ce atoms segregated at grain boundaries（GBs）, the electronic configuration of Zn is restructured to increase active sites for Zn nucleation. This facilitates continuous nucleation throughout the growth stage,leading to a high-rate instantaneous-progressive composite nucleation model that achieves a spatially uniform distribution of Zn nuclei and induces spontaneous grain refinement. Moreover, the incorporation of Ce elements elevates the site energy of GBs, mitigating detrimental parasitic reactions by enhancing the GB stability. Consequently, the remodeled ZnCe electrode exhibits highly reversible Zn plating/stripping with an accumulated capacity of up to 4.0 Ah cm-2in a Zn symmetric cell over 4000 h without short-circuit behavior. Notably, a ～0.4 Ah Zn||NH4V4O10pouch cell runs over 110 cycles with 83% capacity retention with the high-areal-loading cathode(≈20 mg cm-2). This refining-grains strategy offers new insights into designing dendrite-free metal anodes in rechargeable batteries.

关键词： grain refinement rare earth GB stability zinc metal batteries

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Application of metal-based catalysts for Fenton reaction: from homogeneous to heterogeneous, from nanocrystals to single atom

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Nano Research 2024年第11期17卷 9446-9471页

作者： Shangkun Pei Sheng Wang Yuxin Lu Xiang Li Bo Wang Key Laboratory of Cluster Science Ministry of Education Beijing Key Laboratory of Photoelectronic/Electrophotonic Conversion Materials Advanced Technologies Research Institute (Jinan) Advanced Research Institute of Multidisciplinary Science School of Chemistry and Chemical Engineering Beijing Institute of Technology No. 5 South Street Zhongguancun Haidian District Beijing 100081 China

Nowadays, increasing emissions of hazardous chemicals cause serious environmental pollution. The advanced oxidation processes (AOPs), which produce numbers of reactive oxygen species (ROS), are one of the most widely used technologies for degrading refractory pollutants in aqueous phase. Among these, Fenton reaction including both homogeneous and heterogeneous processes, has received increasing attention for water treatment. In this review, various nanomaterials with different size such as nanocrystals, nanoparticles (e.g., iron-based minerals, bimetallic oxides, zero-valent iron, quantum dots) and metal-based single atom catalysts (SACs) applied in homogeneous and heterogeneous Fenton reactions, as well as the corresponding catalytic mechanisms will be systematically summarized. Several factors including the morphology, chemical composition, geometric/electronic structures influence the catalytical behavior simultaneously. Here, the recent research advancement including the advantages and further challenges in homogeneous and heterogeneous Fenton system will be introduced in detail. Furthermore, developments for different nanomaterials, from nanocrystals, nanoparticles (minerals, bimetallic oxides represented by Fe-based catalysts, and nanosized zero valent iron materials) to SACs will be discussed. Some representative catalysts for Fenton reaction and their applications will be presented. In addition, commonly-used supports (e.g., graphene oxide, g-C3N4, and carbon nanotubes) and metal-organic frameworks (MOFs)/derivatives and metal-support interaction for improving Fenton-like performance will be introduced. Finally, different types of catalysts for Fenton reaction are compared and their practical application and operational costs are summarized.

关键词： nanocrystals water purification nanomaterials single atom catalysts(SACs) heterogeneous reaction

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Designing ferroelectric material microstructure for energy storage performance: insight from phase-field simulation

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science Bulletin 2025年第10期70卷 1550-1553页

作者： Shi, Xiaoming Liu, Jiecheng Huang, Houbing School of Mathematics and Physics University of Science and Technology Beijing Beijing100083 China School of Materials Science and Engineering Beijing Institute of Technology Beijing100081 China Advanced Research Institute of Multidisciplinary Science Beijing Institute of Technology Beijing100081 China

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Coupled FEM-SPH simulation of the protective properties for metal/ceramic composite armor

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International Journal of Lightweight Materials and Manufacture 2023年第4期6卷 543-551页

作者： Pan, Guanchen Su, Hui Li, Xingxing Wang, Junsheng School of Mechanical Engineering Beijing Institute of Technology Beijing100081 China School of Materials Science and Engineering Beijing Institute of Technology Beijing100081 China Advanced Research Institute of Multidisciplinary Science Beijing Institute of Technology Beijing100081 China

To support the structural optimization design of metal-ceramic armor against penetration protection performance, this paper optimizes the armor in terms of protection material, armor structure, and bullet resistance mechanism, and envisages a new metal-constrained ceramic composite armor, which overcomes the disadvantages of ceramic material fragility. A coupled finite element-smooth particle hydrodynamics (FEM-SPH) algorithm is used to simulate the penetration process, and the influence of ceramic unit shape and size on the armor protection performance is investigated by quantitatively comparing the bullet energy loss, velocity change, penetration depth, and other indicators that reflect the ballistic protection mechanism. The results show that metal-confined ceramic armor has repairable performance, and filling ceramic units can reduce armor failure area, save armor repair time, and extend armor service life. When the velocity of the projectile is less than 500 m/s, the damaged area of the armor filled with small-sized unit ceramics (1/4 bullet caliber) is small and easy to repair;when the velocity of the projectile is greater than 500 m/s, the armor filled with large-sized unit ceramics (2 times the bullet caliber) can effectively increase the bullet residence time and improve the armor's resistance to elasticity. The results of this paper can provide a reference for the optimal design of the armor structure. © 2023 The Authors

关键词： Energy dissipation

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180 °-twisted bilayer ReSe2 as an artificial noncentrosymmetric semiconductor

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Physical Review Research 2024年第2期6卷 L022048-L022048页

作者： S. Akatsuka M. Sakano T. Yamamoto T. Nomoto R. Arita R. Murata T. Sasagawa K. Watanabe T. Taniguchi N. Mitsuishi M. Kitamura K. Horiba K. Sugawara S. Souma T. Sato H. Kumigashira K. Shinokita H. Wang K. Matsuda S. Masubuchi T. Machida K. Ishizaka Quantum-Phase Electronics Center and Department of Applied Physics Research Center for Advanced Science and Technology (CEMS) Wako Saitama 351-0198 Japan Materials and Structures Laboratory Research Center for Electronic and Optical Materials Research Center for Materials Nanoarchitectonics Photon Factory Institute of Materials Structure Science Institute for Advanced Synchrotron Light Source Department of Physics Graduate School of Science and Advanced Institute for Materials Research (WPI-AIMR) Precursory Research for Embryonic Science and Technology (PRESTO) Institute of Multidisciplinary Research for Advanced Materials (IMRAM) Institute of Advanced Energy Institute of Industrial Science

We have fabricated a 180 °-twisted bilayer ReSe2 by stacking two centrosymmetric monolayer ReSe2 flakes in opposite directions, which is expected to cause the loss of spatial inversion symmetry. We successfully observed spatial inversion-symmetry breaking, in contrast to the monolayer and natural bilayer ReSe2 by the second harmonic generation. ARPES measurements further revealed emergent band dispersions in the 180 °-twisted bilayer ReSe2, distinct from those of the monolayer ReSe2 used in its fabrication. The band calculation shows the finite lifting of spin degeneracy (∼50 meV) distinct from natural monolayer and bilayer ReSe2, which demonstrates that the spin-momentum locked state leading to Berry curvature related phenomena can be realized even with the stacking of centrosymmetric monolayers.

关键词： Electronic structure First-principles calculations Spin-orbit coupling 2-dimensional systems Nanotechnology Transition metal dichalcogenides High-harmonic generation Photoemission spectroscopy

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