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Discontinuous phase diagram of amorphous carbons

National science Review 2024年第4期11卷 164-171页

作者： YinBo Zhu ZhouYu Fang ZhongTing Zhang HengAn Wu CAS Key Laboratory of Mechanical Behavior and Design of Materials Department of Modern MechanicsUniversity of Science and Technology of China State Key Laboratory of Nonlinear Mechanics Institute of Mechanics Chinese Academy of Sciences

The short-range order and medium-range order of amorphous carbons demonstrated in experiments allow us to rethink whether there exist intrinsic properties hidden by atomic disordering. Here we presented six representative phases of amorphous carbons（0.1–3.4 g/cm3）, namely, disordered graphene network（DGN）, high-density amorphous carbon（HDAC）, amorphous diaphite（a-DG）, amorphous diamond（a-D）, paracrystalline diamond（p-D）, and nano-polycrystalline diamond（NPD）, respectively, classified by their topological features and microstructural characterizations that are comparable with experiments. To achieve a comprehensive physical landscape for amorphous carbons, a phase diagram was plotted in the sp3/sp2versus density plane, in which the counterintuitive discontinuity originates from the inherent difference in topological microstructures, further guiding us to discover a variety of phase transitions among different amorphous carbons. Intriguingly, the power law, log（sp3/sp2） ∝ ρn, hints at intrinsic topology and hidden order in amorphous carbons, providing an insightful perspective to reacquaint atomic disorder in non-crystalline carbons.

关键词： amorphous carbons disordered carbons phase diagram microstructural topology phase transition

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Manganese-based oxides cathodes for potassium-ion batteries: a review

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Journal of Energy Chemistry 2025年 108卷 1-18页

作者： Yue, Qinggang Xia, Maoting Zhou, Jiang Cheng, Juanjuan Lu, Bingan School of Physics and Electronics Hunan University Hunan Changsha410082 China State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body Hunan University Hunan Changsha410082 China School of Materials Science and Engineering and Key Laboratory of Nonferrous Metal Materials Science and Engineering Ministry of Education Central South University Hunan Changsha410083 China School of Materials Science and Engineering Hunan Provincial Key Lab of Advanced Materials for New Energy Storage and Conversion Hunan University of Science and Technology Hunan Xiangtan411201 China

Potassium-ion batteries (PIBs) were recognized for their natural abundance, high theoretical output voltage, and the availability of commercialized graphite anodes. However, the development of high-performance manganese-based layered oxide cathodes—a leading candidate for PIB systems—has been fundamentally constrained by irreversible phase transitions (PT) during the cycling process, manifesting as severe structural degradation and capacity fading. This review presents a transformative paradigm integrating machine learning (ML) with multiscale characterization to analyse the complex phase transition mechanisms in Mn-based cathodes. Through systematic ML-driven interrogation of structure–property relationships, we establish quantitative descriptors for phase stability and develop predictive models for transition dynamics. Furthermore, we highlight recent breakthroughs in cross-disciplinary approaches, enabling the rational design of PT-mitigated cathode architectures. By consolidating these insights into a unified knowledge framework, this work provides strategic guidelines for developing structurally robust Mn-based cathodes and outlines future research directions for next-generation PIB systems. © 2025 science Press and Dalian Institute of Chemical Physics, Chinese Academy of sciences.

关键词： Setting

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Effect of Cral and Cr Coatings on the Fatigue Behavior of Zr4 Alloy: In-Situ Sem Study and Cpfem Analysis

SSRN

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SSRN 2025年

作者： Zhai, Hailin Ma, Xianfeng Zhang, Wenjie He, Xiujie Jiang, Jishen Yang, Zhengkai Chen, Huan Xiao, Hongxing Pan, Xiaoqiang Laboratory of Science and Technology of Reactor Fuel and Materials United States Sino-French Institute of Nuclear Engineering and Technology Sun Yat-sen University Guangdong Zhuhai519082 China National Key Laboratory of Nuclear Reactor Technology Nuclear Power Institute of China Sichuan Chengdu610000 China

The accident-tolerant fuel (ATF) coating, recognized as one of the most promising nuclear materials for short-term commercial application, still lacks a comprehensive understanding of its influence on the fatigue performance of the Zr4 substrate. In this study, the effects of representative ATF coatings (CrAl and Cr), produced via various methods, on the fatigue life and failure mechanisms of Zr4 alloy were investigated through 400 °C in-situ SEM testing and crystal plasticity finite element model (CPFEM). The results indicated that the CrAl coating reduced the fatigue life of Zr4 alloy, whereas both the magnetron sputtered (MS) Cr coating and the multi-arc ion plated (AIP) Cr coating notably extended it. Under cyclic loading, CrAl, MS Cr, and AIP Cr coatings showed distinct plastic deformation and cracking behaviors, with different mechanisms affecting the substrate's fatigue failure, resulting in varied impacts on the fatigue life of Zr4 alloy. In light of this, the present study innovatively categorized the fatigue life of the coated substrate into four stages: coating initiation life, coating propagation life, substrate initiation life, and substrate propagation life. The discussion focused on the influence of the coating on the fatigue life at different stages to elucidate its effect on the substrate's fatigue performance. The channel cracks resulting from brittle cracking in the CrAl coating accelerated the initiation of fatigue cracks in the interfacial region of the Zr4 substrate. However, the Cr coating effectively constrained the plastic deformation of the Zr4 substrate, and its superior ductility made the coating less prone to crack initiation. Moreover, a unified predictive model was established to assess the fatigue life of various coated substrates, based on CPFEM calculations. © 2025, The Authors. All rights reserved.

关键词： Zirconium alloys

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Modulation of dynamic aggregation in fluorogenic SNAP-tag probes for long-term super-resolution imaging

Aggregate

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Aggregate 2023年第2期4卷 173-182页

作者： Qinglong Qiao Wenjuan Liu Weijie Chi Jie Chen Wei Zhou Ning Xu Jin Li Xiangning Fang Yi Tao Yinchan Zhang Yingzhu Chen Lu Miao Xiaogang Liu Zhaochao Xu CAS Key Laboratory of Separation Science for Analytical Chemistry Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalianChina University of Chinese Academy of Sciences BeijingChina Fluorescence Research Group Singapore University of Technology and DesignSingaporeSingapore

The combination of super-resolution microscopy and synthetic fluorescence probes has emerged as a universal tool to monitor dynamic biological events at the nanometer ***,the limited site-specificity and fluorogenicity of synthetic fluorescent probes make it still difficult to realize long-term super-resolution ***,we introduce a dynamic aggregation mediated SNAP-tag fluorogenic probe,BGAN-Aze,which can specifically bind to various SNAP-tag fusion proteins with 41-fold fluorescence *** equilibrium between the non-fluorescent aggregate/dimer(A–D)and the fluorescent monomer(M)of BGAN-Aze acts as an effective method to reduce the fluorescence background and endow BGAN-Aze with the capability of conducting washing-free super-resolution imaging of various intracellular and extracellular *** this probe,we monitored multiple dynamic biological events,such as MMC,mitophagy,the fusion of nucleolus,and the growth and contact of *** expect that BGAN-Aze will become a widely used SNAP-tag for super-resolution imaging of dynamic biological events and the A-D-M equilibrium can be a general strategy for designing fluorogenic probes.

关键词： aggregation dimer fluorogenic SNAP-tag super-resolution imaging

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Axial creep behavior of FeCrAl nuclear cladding tubes at a temperature of 600 °C

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Journal of Materials Research and technology 2025年 37卷 841-850页

作者： Yuntao Zhong Peinan Du Yong Chen Jingze Zhou Huan Sheng Lai Ruiqian Zhang Science and Technology on Reactor Fuel and Materials Laboratory Nuclear Power Institute of China Chengdu Sichuan 610213 China Sino-French Institute of Nuclear Engineering and Technology Sun Yat-sen University Zhuhai 519082 China

The impacts of axial creep behavior and alloy composition on the design of safe and effective FeCrAl nuclear fuel cladding tubes remain inadequately investigated. The present work addresses these issues by evaluating the axial creep behavior of FeCrAl nuclear fuel cladding tubes in air at a temperature of 600 °C. While the creep test results represent an expected steady state creep behavior under low applied stress, the tubes are mainly in a tertiary creep state at high stress levels. Therefore, the creep test results in the steady state creep stage are fit using a power-law creep constitutive model and the Kachanov-Rabotnov model is applied for the tertiary creep stage. Comparisons between the creep test results obtained for alloys with a variety of compositions and detailed microstructural analysis of the FeCrAl nuclear fuel cladding tube specimens demonstrate that composite Laves phase particles containing Mo, Nb, and Ta are key factors generally in improving the creep properties of Fe-based alloy cladding tube specimens because the composite particles effectively restrict the motion of dislocations. However, the existence of relatively coarse secondary phase particles contributes to the formation of voids via two distinct mechanisms. Therefore, the secondary phases generated during tube fabrication must be of uniform particle sizes and be uniformly dispersed within the alloy matrix to improve creep properties while minimizing void formation.

关键词： FeCrAl Creep Axial creep Cladding tube

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Mapping the antiparallel aligned domain rotation by microwave excitation

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Chinese Physics B 2024年第9期33卷 599-605页

作者： Jing Zhang Yuanzhi Cui Xiaoyu Wang Chuang Wang Mengchen Liu Jie Xu Kai Li Yunhe Zhao Zhenyan Lu Lining Pan Chendong Jin Qingfang Liu Jianbo Wang Derang Cao College of Physics Qingdao UniversityQingdao 266071China National Demonstration Center for Experimental Applied Physics Education Qingdao UniversityQingdao 266071China SKLSM Institute of SemiconductorsChinese Academy of SciencesBeijing 100083China College of Chemistry Chemical Engineering and Resource UtilizationNortheast Forestry UniversityHarbin 150040China Hunan Provincial Key Laboratory of Intelligent Sensors and Advanced Sensor Materials School of Physics and ElectronicsHunan University of Science and TechnologyXiangtan 411201China CAS Key Laboratory of Magnetic Materials and Devices Ningbo Institute of Materials Technology and EngineeringChinese Academy of SciencesNingbo 315201China Key Laboratory of Optic-Electronic Information and Materials of Hebei Province Research Center for Computational PhysicsCollege of Physics Science and TechnologyHebei UniversityBaoding 071002China Key Laboratory for Magnetism and Magnetic Materials of Ministry of Education Lanzhou UniversityLanzhou 730000China Key Laboratory of Special Functional Materials and Structural Design Ministry of EducationLanzhou UniversityLanzhou 730000China

The evolution process of magnetic domains in response to external fields is crucial for the modern understanding and application of *** this study,we investigated the domain rotation in stripe domain films of varying thicknesses by examining their response to microwave excitation in four different *** resonance spectra indicate that the rotation field of stripe domain film under an applied magnetic field approaches the field where the resonance mode of sample *** saturation field of the stripe domain film corresponds to the field where the resonance mode disappears when measured in the stripe direction parallel to the microwave magnetic *** results are reproducible and consistent with micromagnetic simulations,providing additional approaches and techniques for comprehending the microscopic mechanisms of magnetic domains and characterizing their rotation.

关键词： stripe domain magnetic film microwave excitation micromagnetic simulation

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Stackelberg-Game Computation Offloading Scheme for Parked Vehicle-Assisted VEC and Experiment Analysis

IEEE Transactions on Intelligent Vehicles

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IEEE Transactions on Intelligent Vehicles 2024年第9期9卷 1-12页

作者： Liu, Chunhong Zhao, Mengdi Wang, Huaichen Cheng, Bo Liu, Jialei Yuan, Peiyan Engineering Lab of Intelligence Business & Internet of Things and School of Computer and Information Engineering Henan Normal University Xinxiang China State Key Laboratory of Networking and Switching Technology Beijing University of Posts and Telecommunications Beijing China Hubei Key Laboratory of Power System Design and Test for Electrical Vehicle and School of Computer Engineering Hubei University of Arts and Science Xiangyang China

Vehicle edge computing (VEC) offers users low-latency and high-reliability services by using computational resources at the network's edge. Nevertheless, because of inadequate infrastructure and limited resources, computation-intensive and delay-sensitive vehicle applications cannot be performed efficiently at the edge. Therefore, several studies have used the idle resources of parked vehicles to assist in computation offloading. In this paper, we propose a parked vehicle-assisted vehicle edge computing architecture considering multi-agent collaboration, including intelligent vehicles and edge servers. Additionally, we propose a framework for a parallel Internet of Vehicles (IoV) utilizing computational experiment. The service provider is assigned the role of owning VEC resources and recruiting parking vehicle resources. The model was constructed by using the resource consumption-service relationship of both offloading parties to ensure service quality. First, a Stackelberg game model was constructed based on the interaction between requesting vehicles and a service provider. The latter was the leader, and the requesting vehicles were the followers. The Nash equilibrium for optimal pricing and offloading allocations was attained and verified, and a distributed gradient-based equilibrium algorithm was designed to solve the Stackelberg game model and obtain the final decision through mutual communication. The method also protects the privacy of participants and respects the willingness of requesting vehicles to offload. Finally, the simulation experiments confirmed that the proposed algorithm can achieve game equilibrium. Furthermore, it outperformed state-of-the-art algorithms in improving the service provider's utility. IEEE

关键词： Vehicles

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Photothermalprogramming of magnetic soft materials for complex and reconfigurable 3D deformations

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science China Materials 2024年第12期67卷 4031-4039页

作者： Yiwen Bao Jiyu Li Tao Wang Liu Wang Hangxun Xu Collaborative Innovation Center of Chemistry for Energy Materials(iChEM) Key Laboratory of Precision and Intelligent ChemistryDepartment of Polymer Science and EngineeringUniversity of Science and Technology of ChinaHefei 230026China CAS Key Laboratory of Mechanical Behavior and Design of Materials Department of Modern MechanicsUniversity of Science and Technology of ChinaHefei 230026China State Key Laboratory of Nonlinear Mechanics Institute of MechanicsChinese Academy of SciencesBeijing 100190China

Responsive soft materials capable of complex,reversible,and rapid geometric deformations under external stimuli hold significant potential for applications in minimally invasive medicine,wearable devices,and soft *** this study,we present a novel approach for designing reconfigurable three dimensional(3D)deformable magnetic soft materials through photothermal *** embedding hard magnetic particles within a polymer matrix composed of fibrous polypyrrole(PPy)and semi-crystalline polymer,we develop magnetic composites that can be remotely controlled to achieve precise,programmable deformations under an external magnetic *** key innovation lies in utilizing the photothermal effect of PPy,which temporarily alters the viscosity of the composite when irradiated with infrared light,allowing dynamic orientation of the magnetic *** cooling,the magnetic anisotropy is solidified,enabling rapid and reversible geometric *** method allows for intricate control over the magnetization distribution,leading to the development of multifunctional devices with various potential applications such as complex 3D deformations for soft robotics,multimodal electrical switches,rewritable quick response codes,and shape-adaptable *** study not only enhances the understanding of magnetic moment programming in soft materials but also opens new avenues for the design of adaptive and responsive materials for advanced technological applications.

关键词： photothermal reprogramming magnetic soft materials 3D deformation soft robotics responsive materials

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Discovery of a novel polymyxin adjuvant against multidrug-resistant gram-negative bacteria through oxidative stress modulation

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Acta Pharmaceutica Sinica B 2025年第3期15卷 1680-1695页

作者： Taotao Lu Hongguang Han Chaohui Wu Qian Li Hongyan Hu Wenwen Liu Donglei Shi Feifei Chen Lefu Lan Jian Li Shihao Song Baoli Li Key Laboratory of Tropical Biological Resources of Ministry of Education and Hainan Engineering Research Center for Drug Screening and Evaluation School of Pharmaceutical SciencesHainan UniversityHaikou 570228China State Key Laboratory of Bioreactor Engineering Shanghai Frontiers Science Center of Optogenetic Techniques for Cell MetabolismFrontiers Science Center for Materiobiology and Dynamic ChemistryShanghai Key Laboratory of New Drug DesignSchool of PharmacyEast China University of Science and TechnologyShanghai 200237China Hainan Hospital of Chinese PLA General Hospital Laboratory Department Sanya 5720225China Shanghai Institute of Materia Medica Chinese Academy of SciencesShanghai 201203China School of Pharmaceutical Science and Technology Hangzhou Institute for Advanced StudyUniversity of Chinese Academy of SciencesHangzhou 310024China Anhui Province Key Laboratory of Infectious Diseases the First Affiliated Hospital of Anhui Medical UniversityHefei 230022China Key Laboratory of Xinjiang Phytomedicine Resource and Utilization Ministry of EducationSchool of PharmacyShihezi UniversityShihezi 832003China

Antibiotic adjuvants offer a promising strategy for restoring antibiotic sensitivity,expanding antibacterial spectra,and reducing required ***,compound 15 was identified as a potential adjuvant for Polymyxin B(PB)against multidrug-resistant(MDR)Pseudomonas aeruginosa DK2;however,its clinical utility was hindered by high cytotoxicity,uncertain in vivo efficacy,and an unclear synergetic *** address these challenges,we synthesized and evaluated a series of novel benzamide derivatives,with A22 emerging as a particularly promising candidate.A22 demonstrated potent synergistic activity to PB,minimal cytotoxicity,improved water solubility,and broad-spectrum synergism of polymyxins against various clinically isolated MDR Gram-negative *** vivo studies using Caenorhabditis elegans and mouse models further confirmed the efficacy of ***,A22 effectively suppressed the development of PB resistance in Pseudomonas aeruginosa *** investigations revealed that A22 enhances polymyxins activity by inducing reactive oxygen species production,reducing ATP levels,increasing NOX activity,and inhibiting biofilm formation,leading to bacterial *** findings position A22 as a highly promising candidate for the development of polymyxin adjuvants,offering a robust approach to combating MDR Gram-negative bacterial infections.

关键词： Multidrug resistance Gram-negative bacteria Niclosamide Drug repurposing Polymyxin B Adjuvant Broad-spectrum synergism Oxidative stress

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Prussian blue analogues-derived nitrogen-doped carboncoated FeO/CoO hollow nanocages as a high-performance anode material for Li storage

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Rare Metals 2023年第12期42卷 4070-4080页

作者： Chen Liu Shuang Yuan Yang Yang Xiao-Xi Zhao Xiao Duan Bin Cao Qiang Wang School of Metallurgy Northeastern UniversityShenyang 110819China Key Laboratory for Ecological Metallurgy of Multimetallic Mineral(Ministry of Education) Northeastern UniversityShenyang 110819China Key Laboratory of Electromagnetic Processing of Materials(Ministry of Education) Northeastern UniversityShenyang 110819China Department of Design and Engineering Faculty of Science and TechnologyBournemouth UniversityPooleDorset BH125BBUK

The design of electrode materials with specific structures is considered a promising approach for improving the performance of lithium-ion batteries(LIBs).In this paper,FeO/CoO hollow nanocages coated with a N-doped carbon layer(FCO@NC)was prepared using Fe-Co-based Prussian blue analogs(PBA)as a *** the synthesis,dopamine was the carbon and nitrogen *** reducing atmosphere was assured via NH_3/Ar,which regulated the vacancies in the structure of FCO@NC as well as increased its *** used as anode materials for LIBs,the FCO@NC nanocages deliver a high reversible capacity of 774.89 mAh·g^(-1)at 0.3 A·g^(-1)after200 cycles with a capacity retention rate of 80.4%and426.76 mAh·g^(-1)after 500 cycles at a high current density of 1 A·g^(-1).It is demonstrated that the hollow nanocage structure can effectively enhance the cycle stability,and the heat treatment in NH_(3)/Ar atmosphere contributes to the oxygen vacancy content of the electrode materials,further facilitating its conductivity and electrochemical performance.

关键词： Prussian blue analogue(PBA) Oxygen vacancy Hollow nanocage Nitrogen doping Lithium ion batteries(LIBs)

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