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Rescue of dead MnO2 for stable electrolytic Zn-Mn redox-flow battery:a metric of mediated and catalytic kinetics

National science Review 2024年第8期11卷 219-228页

作者： Qi Wang Wanhai Zhou Yanyan Zhang Hongrun Jin Xinran Li Tengsheng Zhang Boya Wang Ruizheng Zhao Junwei Zhang Wei Li Yu Qiao Chuankun Jia Dongyuan Zhao Dongliang Chao Laboratory of Advanced Materials Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials State Key Laboratory of Molecular Engineering of Polymers College of Chemistry and Materials Fudan University State Key Laboratory of Physical Chemistry of Solid Surfaces Collaborative Innovation Center of Chemistry for Energy Materials (iChEM)Department of Chemistry College of Chemistry and Chemical EngineeringXiamen University Institute of Energy Storage Technology College of Materials Science and EngineeringChangsha University of Science &Technology

The virtues of electrolytic MnO2aqueous batteries are high theoretical energy density,affordability and ***,the continuous dead MnO2and unstable Mn2+/MnO2electrolysis pose challenges to the practical output energy and ***,we demonstrate bifunctional cationic redox mediation and catalysis kinetics metrics to rescue dead MnO2and construct a stable and fast electrolytic Zn-Mn redox-flow battery（eZMRFB）.Spectroscopic characterizations and electrochemical evaluation reveal the superior mediation kinetics of a cationic Fe2+redox mediator compared with the anionic ones（e.g.I-and Br-）,thus eliminating dead *** intensified oxygen vacancies,density functional theory simulations of the reaction pathways further verify the concomitant Fe-catalys ed Mn2+/MnO2electrolysis kinetics via charge delocalization and activated O 2p electron states,boosting its rate *** a result,the elaborated eZMRF B achieves a coulombic efficiency of nearly 100%,ultra-high areal capacity of 80 mAh cm-2,rate capability of 20 C and a long lifespan of 2500 *** work may advance high-energy aqueous batteries to next-generation scalable energy storage.

关键词： aqueous batteries high areal capacity dead MnO2 redox mediator catalysed kinetics

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A detailed protocol for cell force measurement by traction force microscopy

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Smart materials in Medicine 2024年第1期5卷 106-113页

作者： Zhang, Man Zhang, Yu Wang, Peng Sun, Qian Wang, Xin Cao, Yi Wei, Qiang College of Biomedical Engineering Sichuan University Chengdu610065 China Collaborative Innovation Center of Advanced Microstructures National Laboratory of Solid State Microstructure Department of Physics Nanjing University Nanjing210093 China Jinan Microecological Biomedicine Shandong Laboratory Jinan250021 China College of Polymer Science and Engineering State Key Laboratory of Polymer Materials and Engineering Sichuan University Chengdu610065 China Wenzhou Institute University of Chinese Academy of Sciences Wenzhou325001 China

Cellular traction forces (CTFs) are generated by adherent cells and involved in regulating migration, morphology, and homeostasis. Accurate measurement of CTFs is crucial for understanding fundamental biological processes such as morphogenesis, angiogenesis, and wound healing. However, directly measuring CTFs, which typically range in the nanonewton scale, is challenging. Cellular traction force microscopy (TFM) has been developed to quantify CTFs, but detailed operational procedures and complex data analysis limit its applicability. In this study, hydrogels embedded with fluo-spheres serve as the substrate for TFM measurement under a detailed TFM protocol. Additionally, we designed a user-friendly program for easy parameter setting. An open-source program called Python Fourier transform traction cytometry (pyFTTC) is introduced for data analysis, utilizing particle image velocimetry (PIV) to calculate the traction force from a batch of images. Cross-correlation based PIV and L2-regularized FTTC are applied to all images for data analysis. This article provides a straightforward protocol for quantifying CTFs in standard laboratories, facilitating both cell biology studies and biomaterials development. © 2023 The Authors

关键词： Cells

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S incorporated RuO_(2)-based nanorings for active and stable water oxidation in acid

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Nano Research 2022年第5期15卷 3964-3970页

作者： Qing Yao Zhiyong Yu Ying-Hao Chu Yu-Hong Lai Ting-Shan Chan Yong Xu Qi Shao Xiaoqing Huang College of Chemistry Chemical Engineering and Materials ScienceSoochow UniversitySuzhou 215123China State Key Laboratory of Physical Chemistry of Solid Surfaces College of Chemistry and Chemical EngineeringXiamen UniversityXiamen 361005China Department of Materials Science and Engineering "National Yang Ming Chiao Tung University"Hsinchu 30010TaiwanChina "National Synchrotron Radiation Research Center" 101 Hsin-Ann RoadHsinchu 30076TaiwanChina Guangzhou Key Laboratory of Low-Dimensional Materials and Energy Storage Devices Collaborative Innovation Center of Advanced Energy MaterialsSchool of Materials and EnergyGuangdong University of TechnologyGuangzhou 510006China

The design of highly active and stable RuO_(2)-based nanostructures for acidic oxygen evolution reaction(OER)is extremely important for the development of water electrolysis technology,yet remains great *** here demonstrate that the incorporation of S into RuCuO nanorings(NRs)can significantly enhance the acidic OER *** investigations show that the incorporation of S can optimize the interaction of Ru and O,and therefore significantly suppresses the dissolution of Ru in acidic *** optimized catalyst(SH-RuCuO NRs)displays superior OER performance to the commercial RuO_(2)/***,the SH-RuCuO NRs can exhibit significantly enhanced stability for 3,000 cycles of cyclic voltammetry test and more than 250 h chronopotentiometry test at 10 mA·cm^(-2)in 0.5 M H_(2)SO_(4).This work highlights a potential strategy for designing active and stable RuO_(2)-based electrocatalysts for acidic OER.

关键词： S incorporation RuCu nanoring stable acidic oxygen evolution reaction

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Transition and tunability of bound states in the continuum in metastructures composed of subwavelength gratings and distributed Bragg reflectors

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Optics Express 2025年第10期33卷 21807-21821页

作者： Yang, Bo Hao, Chenxi Wang, Minglu Yu, Tianci Peng, Chao Zheng, Wanhua Liu, Anjin State Key Laboratory of Optoelectronic Materials and Devices Institute of Semiconductors Chinese Academy of Sciences Beijing100083 China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of Sciences Beijing100049 China School of Electronic Electrical and Communication Engineering University of Chinese Academy of Sciences Beijing100049 China State Key Laboratory of Photonics and Communications School of Electronics & Frontiers Science Center for Nano-optoelectronics Peking University Beijing100871 China Key Laboratory of Solid-State Optoelectronics Information Technology Institute of Semiconductors Chinese Academy of Sciences Beijing100083 China Hangzhou Institute for Advanced Study University of Chinese Academy of Sciences Hangzhou310024 China

Metastructures that are composed of high-contrast gratings (HCGs) and distributed Bragg reflectors (DBRs) exhibit unique optical properties and have potential applications in surface-emitting lasers and sensors. This paper studies the transition and tunability of bound states in the continuum (BICs) in the HCG-DBR metastructure. At the high-symmetry point, the metastructure has a symmetric mode with radiation loss and an antisymmetric mode (BIC) without radiation loss. The bandgap closure and band flipping occur by modulating the filling factor (FF) of the HCG. The band flipping is essentially related to the transition of the BIC. The topological charge characterizing the far-field polarization of the BIC changes during the band flipping. Furthermore, the HCG-DBR metastructure with a dual-period grating is proposed based on the BICs induced by the Brillouin zone folding. BIC can be tuned by applying different perturbations to the dual-period grating. Both single- and dual-band edge quasi-BICs (QBICs) can be realized. Finally, by employing the dramatic phase change of dual QBICs at the resonant wavelength, giant enhancements of both positive and negative Goos-Hänchen (GH) shifts are achieved. This property can be used to design an ultrasensitive refractive index sensor based on the HCG-DBR metastructure with the Bloch surface wave (BSW) and QBIC-enhanced GH shift. This study is useful for the realization of surface-emitting lasers and high-sensitivity optical sensors based on the HCG-DBR metastructure. © 2025 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement.

关键词： Distributed Bragg reflectors

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Tuning 2D magnetism in Fe3+XGeTe2 films by element doping

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National science Review 2022年第6期9卷 163-170页

作者： Shanshan Liu Zihan Li Ke Yang Enze Zhang Awadhesh Narayan Xiaoqian Zhang Jiayi Zhu Wenqing Liu Zhiming Liao Masaki Kudo Takaaki Toriyama Yunkun Yang Qiang Li Linfeng Ai Ce Huang Jiabao Sun Xiaojiao Guo Wenzhong Bao Qingsong Deng Yanhui Chen Lifeng Yin Jian Shen Xiaodong Han Syo Matsumura Jin Zou Yongbing Xu Xiaodong Xu Hua Wu Faxian Xiu State Key Laboratory of Surface Physics and Department of Physics Fudan University Institute for Nanoelectronic Devices and Quantum Computing Fudan University College of Science University of Shanghai for Science and Technology Laboratory for Computational Physical Sciences(MOE) Fudan University Solid State and Structural Chemistry Unit Indian Institute of Science School of Electronic Science and Engineering Nanjing University Department of Physics University of Washington Department of Electronic Engineering Royal Holloway University of London Materials Engineering The University of Queensland Beijing Key Laboratory of Microstructure and Property of Advanced Materials Institute of Microstructure and Property of Advanced Materials Beijing University of Technology The Ultramicroscopy Research Center Kyushu University State Key Laboratory of ASIC and System School of Microelectronics Fudan University Collaborative Innovation Center of Advanced Microstructures Department of Applied Quantum Physics and Nuclear Engineering Kyushu University Centre for Microscopy and Microanalysis The University of Queensland Shanghai Research Center for Quantum Sciences

Two-dimensional（2D） ferromagnetic materials have been discovered with tunable magnetism and orbital-driven nodal-line features. Controlling the 2D magnetism in exfoliated nanoflakes via electric/magnetic fields enables a boosted Curie temperature（TC） or phase transitions. One of the challenges, however, is the realization of high TC2D magnets that are tunable, robust and suitable for large scale fabrication. Here, we report molecular-beam epitaxy growth of wafer-scale Fe3+XGeTe2films with TCabove room temperature. By controlling the Fe composition in Fe3+XGeTe2, a continuously modulated TCin a broad range of 185–320 K has been achieved. This widely tunable TCis attributed to the doped interlayer Fe that provides a 40% enhancement around the optimal composition X = 2. We further fabricated magnetic tunneling junction device arrays that exhibit clear tunneling signals. Our results show an effective and reliable approach, i.e. element doping, to producing robust and tunable ferromagnetism beyond room temperature in a large-scale 2D Fe3+XGeTe2fashion.

关键词： 2D ferromagnetic material Fe3+XGeTe2 film element doping above room temperature TC tunability

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Unconventional excitonic states with phonon sidebands in layered silicon diphosphide (Jun, 10.1038/s41563-022-01285-3, 2022)

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NATURE materials 2022年第10期21卷 1212-1212页

作者： Zhou, Ling Huang, Junwei Windgaetter, Lukas Ong, Chin Shen Zhao, Xiaoxu Zhang, Caorong Tang, Ming Li, Zeya Qiu, Caiyu Latini, Simone Lu, Yangfan Wu, Di Gou, Huiyang Wee, Andrew T. S. Hosono, Hideo Louie, Steven G. Tang, Peizhe Rubio, Angel Yuan, Hongtao National Laboratory of Solid State Microstructures Jiangsu Key Laboratory of Artificial Functional Materials College of Engineering and Applied Sciences and Collaborative Innovation Center of Advanced Microstructures Nanjing University Nanjing China Max Planck Institute for the Structure and Dynamics of Matter Center for Free Electron Laser Science Hamburg Germany Department of Physics University of California Berkeley CA USA Materials Sciences Division Lawrence Berkeley National Laboratory Berkeley CA USA School of Materials Science and Engineering Peking University Beijing China Materials Research Center for Element Strategy Tokyo Institute of Technology Yokohama Japan College of Materials Science and Engineering National Engineering Research Center for Magnesium Alloys Chongqing University Chongqing China Center for High Pressure Science and Technology Advanced Research Beijing China Department of Physics National University of Singapore Singapore Singapore School of Materials Science and Engineering Beihang University Beijing China Center for Computational Quantum Physics Simons Foundation Flatiron Institute New York NY USA

Complex correlated states emerging from many-body interactions between quasiparticles (electrons, excitons and phonons) are at the core of condensed matter physics and material science. In low-dimensional materials, quantum confinement affects the electronic, and subsequently, optical properties for these correlated states. Here, by combining photoluminescence, optical reflection measurements and ab initio theoretical calculations, we demonstrate an unconventional excitonic state and its bound phonon sideband in layered silicon diphosphide (SiP2), where the bound electron–hole pair is composed of electrons confined within one-dimensional phosphorus–phosphorus chains and holes extended in two-dimensional SiP2 layers. The excitonic state and emergent phonon sideband show linear dichroism and large energy redshifts with increasing temperature. Our ab initio many-body calculations confirm that the observed phonon sideband results from the correlated interaction between excitons and optical phonons. With these results, we propose layered SiP2 as a platform for the study of excitonic physics and many-particle effects.

关键词： Electronic properties and materials Electronic structure Optical spectroscopy Two-dimensional materials

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Perspective:Acoustic Metamaterials in Future engineering

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engineering 2022年第10期17卷 22-30页

作者： Qiangbing Lu Xin Li Xiujuan Zhang Minghui Lu Yanfeng Chen National Laboratory of Solid State Microstructures&Department of Materials Science and Engineering Nanjing UniversityNanjing 210093China Jiangsu Key Laboratory of Artificial Functional Materials Nanjing UniversityNanjing 210093China Collaborative Innovation Center of Advanced Microstructures Nanjing UniversityNanjing 210093China

Acoustic metamaterials(AMMs)are a type of artificial materials that make use of appropriate structural designs and exhibit exotic properties not found in natural materials,such as negative effective material parameters(e.g.,bulk modulus,mass density,and refractive index).These interesting properties offer novel means for sound manipulation and thus have drawn a great deal of *** the past two decades,tremendous progress has been made in the fundamental research of AMMs,which has not only promoted the development of modern acoustics but also shown the potential of AMMs for engineering ***,we review recent developments in AMMs with a focus on their future engineering,especially in the most promising fields of sound absorption/isolation,acoustic imaging,cloaking,and so on,furthermore,we outline the opportunities and challenges they are encountering.

关键词： Acoustic metamaterials Sound absorption/isolation Acoustic imaging engineering application

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Five-user quantum virtual local area network with an AlGaAs entangled photon source

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science China(Physics,Mechanics & Astronomy) 2025年第3期68卷 61-73页

作者： Cheng Qian Hongkai Tian Xu Jing Yichen Liu Zhe Chen Huiran Luo Yuan Du Xiaodong Zheng Tangsheng Chen Yuechan Kong Hua-Lei Yin Dong Jiang Bin Niu Liangliang Lu Key Laboratory of State Manipulation and Advanced Materials in Provincial Universities School of Physical Science and TechnologyNanjing Normal UniversityNanjing210023China School of Internet Anhui UniversityHefei230039China National Key Laboratory of Solid-State Microwave Devices and Circuits Nanjing Chip Valley Industrial Technology InstituteNanjing Electronic Devices InstituteNanjing210016China Research Center for Quantum Optics and Quantum Communication School of ScienceQingdao University of TechnologyQingdao266520China Department of Physics and Beijing Key Laboratory of Opto-electronic Functional Materials and Micro-nano Devices Key Laboratory of Quantum State Construction and Manipulation(Ministry of Education)Renmin University of ChinaBeijing100872China Beijing Academy of Quantum Information Sciences Beijing100193China National Engineering Research Center of Agro-Ecological Big Data Analysis and Application Anhui UniversityHefei230601China National Laboratory of Solid-State Microstructures and School of Physics Nanjing UniversityNanjing210093China Hefei National Laboratory Hefei230088China

The promotion of quantum network applications demands the scalable connection of quantum *** is preferable to set up multiple logical networks coexisting on a single physical network infrastructure to accommodate a larger number of *** we present a quantum virtual network architecture that offers this level of scalability,without being constrained to a fixed physical-layer network relying solely on passive multiplexing *** architecture can be understood as arising from the superposition of a fully connected entanglement distribution network and port-based virtual local area network,which group multiusers by access *** terms of hardware,we leverage a semiconductor chip with a high figure-of-merit modal overlap to directly generate high-quality polarization entanglement,and a streamlined polarization analysis module,which requires only one single-photon detector for each end *** experimentally perform the BBM92 QKD protocol on the five-user quantum virtual network and demonstrate voice and image encryption on a campus area *** results may provide insights into the realization of large-scale quantum networks with integrated and cost-efficient photonic architecture.

关键词： quantum network quantum entanglement distribution integrated photonics image and voice encryption

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Critical couplings in topological-insulator waveguide-resonator systems observed in elastic waves

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National science Review 2021年第2期8卷 83-94页

作者： Si-Yuan Yu Cheng He Xiao-Chen Sun Hong-Fei Wang Ji-Qian Wang Zi-Dong Zhang Bi-Ye Xie Yuan Tian Ming-Hui Lu Yan-Feng Chen National Laboratory of Solid State Microstructures and Department of Materials Science and Engineering Nanjing University Collaborative Innovation Center of Advanced Microstructures Nanjing University Jiangsu Key Laboratory of Artificial Functional Materials Nanjing University

Waveguides and resonators are core components in the large-scale integration of electronics, photonics and phononics, both in existing and future scenarios. In certain situations, there is critical coupling of the two components; i.e. no energy passes through the waveguide after the incoming wave couples into the resonator. The transmission spectral characteristics resulting from this phenomenon are highly advantageous for signal filtering, switching, multiplexing and sensing. In the present study, adopting an elastic-wave platform, we introduce topological insulator(TI), a remarkable achievement in condensed matter physics over the past decade, into a classical waveguide-ring-resonator configuration. Along with basic similarities with classical systems, a TI system has important differences and advantages, mostly owing to the spin-momentum locked transmission states at the TI boundaries. As an example, a two-port TI waveguide resonator can fundamentally eliminate upstream reflections while completely retaining useful transmission spectral characteristics, and maximize the energy in the resonator, with possible applications being novel signal processing, gyro/sensing, lasering, energy harvesting and intense wave–matter interactions, using phonons, photons or even electrons. The present work further enhances confidence in using topological protection for practical device performance and functionalities, especially considering the crucial advantage of introducing(pseudo)spins to existing conventional configurations. More in-depth research on advancing phononics/photonics, especially on-chip, is foreseen.

关键词： topological insulators phononic crystals ring resonators waveguide-resonator systems critical couplings

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Phase selection-oriented mechanical properties tailoring forβ-type TiNbZrTaSi alloy fabricated by laser powder bed fusion

Advanced Powder Materials

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Advanced Powder materials 2023年第3期2卷 77-87页

作者： Xuan Luo Tao Song Feng Wang Haizhou Lu Limei Kang Hongwei Ma Dongdong Li Annett Gebert Chao Yang National Engineering Research Center of Near-net-shape Forming for Metallic Materials Guangdong Provincial Key Laboratory for Processing and Forming of Advanced Metallic MaterialsSouth China University of TechnologyGuangzhou 510640China State Key Laboratory of Materials Processing and Die&Mould Technology Huazhong University of Science and TechnologyWuhan 430074China Institute for Complex Materials Leibniz Institute for Solid State and Materials Research Dresden01069DresdenGermany Guangzhou Railway Polytechnic Guangzhou 510430China

The morphology and distribution of silicides inα/αþβtype titanium alloys impress on their ***,the types of silicide precipitates and their formation mechanisms remain unclear inβ-type Ti–Nb–Zr–Ta *** this study,we report the precipitation behavior of silicides formed upon aging treatment of a laser powder bed fusion(LPBF)-fabricatedβ-type Ti–34.5Nb–6.9Zr–4.9Ta–1.4Si(wt%,TNZTS)*** further discuss their underlying formation mechanism and silicide selection-oriented mechanical properties tailoring for LPBF-fabricated TNZTS *** novel silicide precipitates were formed:a supersaturated Si–richβ–Ti matrix in the form of a network that can further transform into the(Ti,Zr)2Si(S2)phase with the increase of aging temperature;and a short,rod-like S2 precipitate adjacent to pre-existing dot-shaped *** former results from the aggregation of Si solute atoms towards to the dislocation walls/microbands and the subsequent precipitation reaction,while the latter arises from the considerable micro-strain around the phase boundary between the dotshaped S2 andβ-Ti owing to the large difference in their thermal expansion coefﬁ*** aging-treated TNZTS alloy exhibits a good combination of tensile strength(10835 MPa)and fracture strain(5.6%1.0%),which is attributed to precipitation strengthening,grain-boundary strengthening,and discontinuous intergranular silicide derived from phase *** obtained results provide a basis for the design and fabrication of biomedical Sicontainingβ-type Ti alloys with excellent mechanical properties.

关键词： Laser powder bed fusion β-type titanium alloys Silicide precipitates Microstructure Mechanical propertie

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