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SSRN 2023年

作者： Li, Zimu Zhu, Min Li, Fang Li, Zhi Zhao, Anqi Haghighatbin, Mohammad A. Cui, Hua Anhui Province Key Laboratory of Advanced Catalytic Materials and Reaction Engineering School of Chemistry and Chemical Engineering Hefei University of Technology Anhui Hefei230009 China CAS Key Laboratory of Soft Matter Chemistry Collaborative Innovation Center of Chemistry for Energy Materials Department of Chemistry University of Science and Technology of China Anhui Hefei230026 China PLA Army Academy of Artillery and Air Defense Anhui Hefei230031 China

The development of chemiluminescence (CL) sensing strategy with multiple-parameters for discrimination of small molecules remains a great challenge. Herein, a multicolor CL sensing strategy for the discrimination of five antioxidants, including dopamine, catechin, cysteine, glutathione, and thioctic acid was presented. Firstly, multilayer paper chips modified with luminol-Co(II), luminol-fluorescein-Co(II), and luminol-rhodamine B-Co(II) that can produce strong blue, green and purple colored light emission, respectively, via CL and CL resonance energy transfer (CRET) reactions were fabricated. The presence of antioxidants exhibits different inhibition or enhancement effect on the CL reactions, creating unique multicolor CL response pattern to each antioxidant. The red (R), green (G), and blue (B) channel split from the purple, green and blue CL image, respectively, generate cross-reactive sensing parameters for the discrimination of the five antioxidants. The distinct R, G, and B values of the CL images to each antioxidant are created as analytical fingerprints to identify five antioxidants by using principal component analysis and hierarchical cluster analysis. Satisfied results were obtained for discrimination antioxidant mixtures and spiked antioxidants in serum samples. Identification of 10 unknown samples resulted in 100% accuracy. This work presents the first example of multicolor CL sensing strategy for the discrimination of small molecules. © 2023, The Authors. All rights reserved.

关键词： Microfluidics

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Multifunctional V3S4-nanowire/graphene composites for high performance Li-S batteries

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science China materials 2020年第10期63卷 1910-1919页

作者： Tianyu Tang Teng Zhang Lina Zhao Biao Zhang Wei Li Junjie Xu Tao Li Long Zhang Hailong Qiu Yanglong Hou Beijing Key Laboratory for Magnetoelectric Materials and Devices(BKLMMD) Beijing Innovation Center for Engineering Science and Advanced Technology(BIC-ESAT)Department of Materials Science and EngineeringCollege of EngineeringPeking UniversityBeijing 100871China Clean Nano Energy Center State Key Laboratory of Metastable Materials Science and TechnologyCollege of Materials Science and EngineeringYanshan UniversityQinhuangdao 066004China

Lithium sulfur(Li-S)batteries have been regarded as a promising next-generation energy storage system with high theoretical specific capacity and energy density,but still facing *** order to make Li-S batteries more competitive,combination of trapping sites and electrocatalytic properties for polysulfides is an effective way to improve the battery *** this study,we prepare a type of multifunctional V3S4-nanowire/graphene composites(V3S4-G)by uniformly dispersing V3S4 nanowires on the graphene *** structure contributes to the sufficient exposure of multifunctional V3S4 active sites which can anchor polysulfides and accelerate reaction ***,the Li-S batteries based on the multifunctional V3S4-G sulfur cathode deliver a stable cycling performance and good rate *** at sulfur loading of 3 mg cm^−2,the V3S4-G sulfur cathode possesses a low capacity decay rate of 0.186%per cycle at 0.5 C.

关键词： Li-S batteries V3S4-G trapping sites electrocatalytic properties

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Methanol-Facilitated Surface Reconstruction Catalysts for Near 200% Faradaic Efficiency in a Coupled System

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advanced Functional materials 2024年第30期34卷

作者： Xia, Qing Jin, Chengkai Huang, Yu Lun Zhai, Yanjie Han, Wenkai Wu, Jie Xia, Chuan Lin, Chun Che Zhao, Xunhua Zhang, Xiao Department of Mechanical Engineering Research Institute for Advanced Manufacturing The Hong Kong Polytechnic University Hung Hom Kowloon999077 Hong Kong Research Institute for Smart Energy The Hong Kong Polytechnic University Hung Hom Kowloon999077 Hong Kong Key Laboratory of Quantum Materials and Devices of Ministry of Education School of Physics Southeast University Nanjing211189 China Institute of Organic and Polymeric Materials National Taipei University of Technology Taipei106 Taiwan School of Materials and Energy University of Electronic Science and Technology of China Sichuan Chengdu610000 China Research and Development Center for Smart Textile Technology National Taipei University of Technology Taipei106 Taiwan Shenzhen Research Institute The Hong Kong Polytechnic University Shenzhen518057 China

The coupling of the carbon dioxide reduction reaction (CO2RR) and methanol oxidation reaction (MOR) holds great promise for the energy-efficient production of HCOO−. However, anode catalysts' limited selectivity (− production rates. To overcome it, copper-copper(I) oxide-copper(II) oxide nanowires (Cu─CuO─Cu2O NWs) catalysts have been developed, which exhibit exceptional performance in promoting the MOR with a faradic efficiency of nearly 100% at commercially viable current densities, and long stability over 100 h at 100 mA cm−2. Interestingly, the unique structure of the catalysts, when exposed to methanol, facilitates a transition from Cu/CuO to Cu2O. This phenomenon promotes the MOR while inhibiting the competitive oxygen evolution reaction (OER). By coupling the anodic reaction with cathodic CO2 reduction, the system demonstrates exceptional performance in HCOO− production, achieving an overall faradic efficiency of nearly 200% at 100 mA cm−2 with a low cell voltage of 2.382 V. Techno-economic analysis indicates that the production costs of HCOOH are ≈US$0.37 and 0.35 kg−1 at 100 and 150 mA cm−2, respectively, significantly lower than those associated with traditional electrochemical methods. © 2024 The Authors. advanced Functional materials published by Wiley-VCH GmbH.

关键词： Copper oxides

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NIR-Ⅱ Excitation and NIR-I Emission Based Two-photon Fluorescence Lifetime Microscopic Imaging Using Aggregation-induced Emission Dots

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Chemical Research in Chinese Universities 2021年第1期37卷 171-176页

作者： LIU Wen ZHANG Yuhuang QI Jj QIAN Jun TANG Ben Zhong State Key Laboratory of Modern Optical Instrumentations Centre for Optical and Electromagnetic ResearchCollege of Optical Science and EngineeringInternational Research Center for Advanced PhotonicsZhejiang UniversityHangzhou310058P.R.China Guangdong Provincial Key Laboratory of Luminescence from Molecular Aggregates South China University of TechnologyGuangzhou510640P.R.China Department of Chemistry The Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration and ReconstructionInstitute for Advanced Study and Department of Chemical and Biological Engineering and Institute of Molecular Functional MaterialsThe Hong Kong University of Science and TechnologyClear Water BayKowloonHong KongP.R.China

Near-infrared(NIR)lights are powerful tools to conduct deep-tissue imaging since NIR-Ⅰ wavelengths hold less photon absorption and NIR-Ⅱ wavelengths serve low photon scattering in the biological tissues compared with visible ***-photon fluorescence lifetime microscopy(2PFLM)can utilize NIR-Ⅱ excitation and NIR-Ⅰ emission at the same time with the assistance of a well-designed fluorescent *** induced emission(AIE)dyes are famous for unique optical properties and could serve a large two-photon absorption(2PA)cross-section as aggregated ***,we report two-photon fluorescence lifetime microscopic imaging with NIR-Ⅱ excitation and NIR-Ⅰ emission using a novel deep-red AIE *** AIE-gens held a 2PA cross-section as large as 1.61×10^(4)GM at 1040 *** AIE dots had a two-photon fluorescence peak at 790 nm and a stable lifetime of 2.2 ns under the excitation of 1040 nm femtosecond *** brain vessels of a living mouse were vividly reconstructed with the two-photon fluorescence lifetime information obtained by our home-made 2PFLM *** vessels as small as 3.17µm were still observed with a nice signal-background ratio at the depth of 750µ*** work will inspire more insight into the improvement of the working wavelength of fluorescent agents and traditional 2PFLM.

关键词： Near-infrared Brain imaging Aggregation-induced emission Two-photon fluorescence lifetime microscopic imaging

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Improving open-circuit voltage by a chlorinated polymer donor endows binary organic solar cells efficiencies over 17%

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science China Chemistry 2020年第3期63卷 325-330页

作者： Ruijie Ma Tao Liu Zhenghui Luo Qing Guo Yiqun Xiao Yuzhong Chen Xiaojun Li Siwei Luo Xinhui Lu Maojie Zhang Yongfang Li He Yan Department of Chemistry and Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration&Reconstruction Hong Kong University of Science and Technology(HKUST)Clear Water BayKowloonHong KongChina Hong Kong University of Science and Technology-Shenzhen Research Institute Shenzhen 518057China Laboratory of Advanced Optoelectronic Materials College of ChemistryChemical Engineering and Materials ScienceSoochow UniversitySuzhou 215123China Department of Physics Chinese University of Hong KongNew TerritoriesHong KongChina

Power conversion efficiency(PCE)of single-junction polymer solar cells(PSCs)has made a remarkable breakthrough *** of work was reported to achieve PCEs higher than 16%derived from the PM6:Y6 binary *** further increase the PCEs of binary OSCs incorporating small molecular acceptor(SMA)Y6,we substituted PM6 with PM7 due to the deeper highest occupied molecular orbital(HOMO)of ***,the PM7:Y6 has achieved PCEs as high as 17.0%by the hotcast method,due to the improved open-circuit voltage(VOC).Compared with PM6,the lower HOMO of PM7 increases the gap between ELUMO-donor and EHOMO-acceptor,which is proportional to *** research provides a high PCE for single-junction binary PSCs,which is meaningful for device fabrication related to PM7 and commercialization of PSCs.

关键词： single junction binary system power conversion efficiencies open-circuit voltage

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Photonic Frequency Space Simulation of Tight-Binding Lattices Using Integrated LNOI Ring Resonators

Photonic Frequency Space Simulation of Tight-Binding Lattice...

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

作者： Armandas Balčytis Hiep Dinh Tomoki Ozawa Yasutomo Ota Toshihiko Baba Satoshi Iwamoto Arnan Mitchell Thach G. Nguyen Integrated Photonics and Applications Centre RMIT University Melbourne VIC Australia Advanced Institute for Materials Research Tohoku University Sendai Japan Department of Applied Physics and Physico-Informatics Keio University Yokohama Japan Department of Electrical and Computer Engineering Yokohama National University Hodogaya-ku Yokohama Japan Research Center for Advanced Science and Technology The University of Tokyo Meguro-ku Tokyo Japan

We use electro-optically modulated ring cavities, integrated on thin-film lithium niobate, to model frequency dimension tight-binding lattices with versatile connectivity. Inter-mode coupling range, strength, and hopp... 详细信息

ISBN: (数字)9798350372076

ISBN: (纸本)9798350372083

关键词： Frequency modulation Lithium niobate Resonant frequency Lattices Electro-optic modulators Ring lasers Laser modes

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Quasi-phase-matching-division multiplexing holography in a three-dimensional nonlinear photonic crystal

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Light(science & Applications) 2021年第8期10卷 1520-1526页

作者： Pengcheng Chen Chaowei Wang Dunzhao Wei Yanlei Hu Xiaoyi Xu Jiawen Li Dong Wu Jianan Ma Shengyun Ji Leran Zhang Liqun Xu Tianxin Wang Chuan Xu Jiaru Chu Shining Zhu Min Xiao Yong Zhang National Laboratory of Solid State Microstructures College of Engineering and Applied SciencesSchool of Physicsand Collaborative Innovation Center of Advanced MicrostruauresNanjing UniversityNanjing 210093China. Hefei National Laboratory for Physical Sciences at the Microscale and CAS Key Laboratory of Mechanical Behavior and Design of Materials Department of Precision Machinery and Precision InstrumentationUniversity of Science and Technology of ChinaHefei 230026China. Department of Physics University of ArkansasFayettevilleAR 72701USA

Nonlinear holography has recently emerged as a novel tool to reconstruct the encoded information at a new wavelength,which has important applications in optical display and optical ***,this scheme still struggles with low conversion efficiency and ineffective *** this work,we demonstrate a quasi-phasematching(QPM)-division multiplexing holography in a three-dimensional(3D)nonlinear photonic crystal(NPC).3D NPC works as a nonlinear hologram,in which multiple images are distributed into different Ewald spheres in reciprocal *** reciprocal vectors locating in a given Ewald sphere are capable of fulfilling the complete QPM conditions for the high-efficiency reconstruction of the target image at the second-harmonic(SH)*** can easily switch the reconstructed SH images by changing the QPM *** multiplexing capacity is scalable with the period number of 3D *** work provides a promising strategy to achieve highly efficient nonlinear multiplexing holography for high-security and high-density storage of optical information.

关键词： wave nonlinear matching

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Raman Linewidth Contributions from Four-Phonon and Electron-Phonon Interactions in Graphene

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Physical Review Letters 2022年第4期128卷 045901-045901页

作者： Zherui Han Xiaolong Yang Sean E. Sullivan Tianli Feng Li Shi Wu Li Xiulin Ruan School of Mechanical Engineering and the Birck Nanotechnology Center Purdue University West Lafayette Indiana 47907-2088 USA Institute for Advanced Study Shenzhen University Shenzhen 518060 China College of Physics and Center of Quantum Materials and Devices Chongqing University Chongqing 401331 China Materials Science and Engineering Program The University of Texas at Austin Austin Texas 78712 USA Department of Mechanical Engineering The University of Utah Salt Lake City Utah 84112 USA

The Raman peak position and linewidth provide insight into phonon anharmonicity and electron-phonon interactions in materials. For monolayer graphene, prior first-principles calculations have yielded decreasing linewidth with increasing temperature, which is opposite to measurement results. Here, we explicitly consider four-phonon anharmonicity, phonon renormalization, and electron-phonon coupling, and find all to be important to successfully explain both the G peak frequency shift and linewidths in our suspended graphene sample over a wide temperature range. Four-phonon scattering contributes a prominent linewidth that increases with temperature, while temperature dependence from electron-phonon interactions is found to be reversed above a doping threshold (ℏωG/2, with ωG being the frequency of the G phonon).

关键词： Lattice dynamics Phonons Graphene First-principles calculations Raman spectroscopy

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Possible gapless quantum spin liquid behavior in the triangular-lattice Ising antiferromagnet PrMgAl11O19

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Physical Review B 2024年第16期109卷 165143-165143页

作者： Zhen Ma Shuhan Zheng Yingqi Chen Ruokai Xu Zhao-Yang Dong Jinghui Wang Hong Du Jan Peter Embs Shuaiwei Li Yao Li Yongjun Zhang Meifeng Liu Ruidan Zhong Jun-Ming Liu Jinsheng Wen Hubei Key Laboratory of Photoelectric Materials and Devices School of Materials Science and Engineering Hubei Normal University Huangshi 435002 China State Key Laboratory of Surface Physics and Department of Physics Fudan University Shanghai 200433 China Department of Applied Physics Nanjing University of Science and Technology Nanjing 210094 China ShanghaiTech Laboratory for Topological Physics and School of Physical Science and Technology ShanghaiTech University Shanghai 200031 China Tsung-Dao Lee Institute & School of Physics and Astronomy Shanghai Jiao Tong University Shanghai 200240 China Laboratory for Neutron Scattering and Imaging Paul Scherrer Institut 5232 Villigen Switzerland National Laboratory of Solid State Microstructures and Department of Physics Nanjing University Nanjing 210093 China Collaborative Innovation Center of Advanced Microstructures Nanjing University Nanjing 210093 China

Quantum spin liquids (QSLs) represent a novel state where spins are highly entangled but do not order even at zero temperature due to strong quantum fluctuations. Such a state is mostly studied in Heisenberg models defined on geometrically frustrated lattices. Here, we turn to a new triangular-lattice antiferromagnet PrMgAl11O19, in which the interactions are believed to be of Ising type. Magnetic susceptibility measured with an external field along the c axis is two orders of magnitude larger than that with a field in the ab plane, displaying an ideal easy-axis behavior. Meanwhile, there is no magnetic phase transition or spin freezing observed down to 1.8 K. Ultralow-temperature specific heat measured down to 50 mK does not capture any phase transition either, but a hump at 4.5 K, below which the magnetic specific heat exhibits a quasiquadratic temperature dependence that is consistent with a Dirac QSL state. The inelastic neutron scattering technique is also employed to elucidate the nature of its ground state. In the magnetic excitation spectra, there is a gapless broad continuum at the base temperature 55 mK, in favor of the realization of a gapless QSL. Our results provide a scarce example for the QSL behaviors observed in an Ising-type magnet, which can serve as a promising platform for future research on QSL physics based on an Ising model.

关键词： Frustrated magnetism Magnetic anisotropy Magnetism Quantum spin liquid Spin-orbit coupling Spinon Antiferromagnets Inelastic neutron scattering Specific heat measurements Susceptibility measurements

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Effect of Current on the Tribological Behavior of Cu-Fe-P Immiscible Alloy Produced by Laser Powder Bed Fusion

SSRN

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SSRN 2024年

作者： Zeng, Delong Zhou, Shengfeng Yi, Yanliang Lu, Yang Qiu, Yating Sun, Daxiang Shi, Changliang Institute of Advanced Wear & Erosion Resistance and Functional Materials Jinan University Guangzhou510632 China Huazhong University of Science and Technology Wuhan430074 China Centre for Industrial Analysis and Testing Guangdong Academy of Sciences Guangzhou510650 China Department of Mechanical Engineering The University of Hong Kong Pokfulam Hong Kong

Cu-based immiscible alloys have significant potential application value in the field of electrical contacts. This study investigated the tribological behavior of Cu-Fe-P immiscible alloys produced via laser powder bed fusion (LPBF) under current-carrying conditions. The alloys consist of softer Ε-Cu phase and harder Fe-rich phases. The Fe-rich phase acts as a protective reinforcement during current-carrying friction and wear tests, improving the wear resistance of the alloy. With the increasing current, the coefficient of friction exhibited a trend of initial rise and then fall, whereas the wear rate showed a gradual increase. When the low current is adopted (0, 2, 3 and 5 A), the wear mechanism is mainly mechanical wear. As the current increases, the mechanical wear gradually transitions from adhesive wear to abrasive wear, accompanied by weak oxidative wear. At higher currents (7 A and 10 A), the wear mechanism is dominated by arc erosion wear and oxidative wear. Notably, when the current exceeded 2A, an oxide film composed of CuO, Fe2O3, and Fe3O4 was formed to enhance the frictional properties of the alloy. As the current surpassed 5 A, the arc discharge occurred at high currents, forming molten phases and arc erosion pits on the worn surface of the Cu-Fe-P immiscible alloy. © 2024, The Authors. All rights reserved.

关键词： Oxide films

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