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Elastic properties of Cu–6wt% Ag alloy wires for pulsed magnets investigated by ultrasonic techniques

Chinese Physics B 2025年第2期34卷 90-95页

作者： Ziyu Li Tianyi Gu Wenqi Wei Yang Yuan Zhuo Wang Kangjian Luo Yupeng Pan Jianfeng Xie Shaozhe Zhang Tao Peng Lin Liu Qi Chen Xiaotao Han Yongkang Luo Liang Li Wuhan National High Magnetic Field Center Huazhong University of Science and TechnologyWuhan 430074China School of Physics Huazhong University of Science and TechnologyWuhan 430074China State Key Laboratory of Advanced Electromagnetic Engineering and Technology Huazhong University of Science and TechnologyWuhan 430074China School of Materials Science and Engineering State Key Laboratory for Materials Processing and Die&Mold TechnologyHuazhong University of Science and TechnologyWuhan 430074China

Conductor materials with good mechanical performance as well as high electrical and thermal conductivities are particularly important to break through the current bottle-neck limit(~ 100 T) of pulsed magnets. Here, we perform systematic studies on the elastic properties of the Cu–6wt% Ag alloy wire, which is a promising candidate material for the new-generation pulsed magnets, by employing two independent ultrasonic techniques, i.e., resonant ultrasound spectroscopy(RUS) and ultrasound pulse-echo experiments. Our RUS measurements manifest that the elastic properties of the Cu–6wt% Ag alloy wires can be improved by an electroplastic drawing procedure as compared with the conventional cold drawing. We also take this opportunity to test the availability of our newly-built ultrasound pulse-echo facility at the Wuhan National High Magnetic Field Center(WHMFC, China), and the results suggest that the elastic performance of the electroplastically-drawn Cu–6wt% Ag alloy wire remains excellent without anomalous softening under extreme conditions,e.g., in ultra-high magnetic field up to 50 T and nitrogen or helium cryogenic liquids.

关键词： high-field magnet Cu–Ag alloy ultrasonic techniques elastic constants

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Fabrication and characterization of GCF/PyC composites by TG-CVI densified porous glassy carbon preform

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Ceramics International 2025年第15期51卷 20776-20785页

作者： Jia, Jiangang You, Xinya Pan, Zikang Zhang, Hongqiang Xiao, Yang Yuan, Zhongtian Liu, Diqiang Guo, Tieming State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals Lanzhou University of Technology Lanzhou730050 China School of Materials Science and Engineering Lanzhou University of Technology Lanzhou730050 China

Carbon foams with adjustable three-dimensional architecture are obtained by template method. This paper describes the effects of template content impact on the porous framework, microstructure and mechanical properties of glassy carbon foams. Then a serious of glassy carbon foam/pyrocarbon (GCF/PyC) composites were fabricated by thermal gradient chemical vapor deposition (TG-CVI) using glassy carbon foam with different porosity as preform. After densification, bulk density of glassy carbon foam was increased and defects in carbon foam framework were repaired, which contributes to mechanical properties and ensures higher thermal conductivity. As the porosity increases, compressive strength of carbon foam gradually decreases from 83.03 MPa to 24.52 MPa. The compressive and flexural strengths of obtained GCF/PyC composites first increased and reached the peak values, then decreased. The maximum compressive and flexural strengths of GCF1/1-C are measured to be 120.5 MPa and 92.21 MPa, which are 135 % and 267 % higher than that of carbon foam GCF1/1. The thermal conductivity of carbon foam decreases from 1.22 W/m·K to 0.75 W/m·K with the porosity increase. For GCF/PyC composites, thermal conductivity first increases to 4.41 W/m·K then decrease, and GCF2/1-C has lowest thermal conductivity of 3.26 W/m·K among all GCF/PyC samples, which is 160 % higher than that of GCF2/1 before densification. © 2025 Elsevier Ltd and Techna Group S.r.l.

关键词： Glassy carbon

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Visible-light-induced controllable transformations of cumulative aryldienes through an energy transfer process

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Science China Chemistry 2025年第3期68卷 987-1001页

作者： Ling Qian Ziqi Yu Jiaxin Liu Yin Wei Min Shi Key Laboratory for Advanced Materials and Institute of Fine Chemicals Key Laboratory for Advanced Materials and Feringa Nobel Prize Scientist Joint Research CenterSchool of Chemistry&Molecular EngineeringEast China University of Science and TechnologyShanghai 200237China State Key Laboratory of Organometallic Chemistry Center for Excellence in Molecular SynthesisUniversity of Chinese Academy of SciencesShanghai Institute of Organic ChemistryChinese Academy of SciencesShanghai 200032China Key Laboratory of Fluorine and Nitrogen Chemistry and Advanced Materials Shanghai Institute of Organic ChemistryUniversity of Chinese Academy of SciencesChinese Academy of SciencesShanghai 200032China

In this work,we report a visible light-induced energy transfer process related photochemical protocol of cumulative diene containing compounds for the construction of benzocyclohexene skeletons or the corresponding aromatized structures through an energy transfer process,1,5-hydrogen atom transfer and a 6πelectrocyclization or demethoxylation in the presence of different photocatalysts such as[Ir(dF(Me)ppy)_(2)(dtbbpy)]PF_(6) or *** newly developed photochemical strategy is characterized by mild conditions,broad substrate applicability,good functional group tolerance and good *** mechanistic paradigm was clarified by deuterium labeling,kinetic,photophysical and electrochemical analyses,control experiments and density functional theory(DFT)*** transformation of the obtained product to the drug-like molecules such as Sertraline and the luminescent conjugated aromatic compounds has also been disclosed.

关键词： visible-light photocatalysis EnT process 1,5-HAT remote C(sp^(3))-H bond activation

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Engineering eg filling of RuO_(2)enables a robust and stable acidic water oxidation

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Chinese Chemical Letters 2025年第3期36卷 444-448页

作者： Qing Li Yumei Feng Yingjie Yu Yazhou Chen Yuhua Xie Fang Luo Zehui Yang State Key Laboratory of New Textile Materials&Advanced Processing Technology College of Materials Science and EngineeringWuhan Textile UniversityWuhan 430200China Faculty of Materials Science and Chemistry China University of Geosciences WuhanWuhan 430074China

Efficient and stable electrocatalyst for oxygen evolution reaction(OER)in acidic environment is vital for polymer electrolyte membrane water electrolysis(PEMWE).In this work,we have devised the formation of heterostructured RuO_(2)/MnO_(2)with nanoflower structure for acidic OER *** to commercial RuO_(2),the overpotential at 50mA/cm^(2)is decreased by 36 mV,corresponding to a 3.7-fold better mass *** boosted acidic OER performance is attributed to the heterostructure inducing more electrons are filled in e_(g)orbital of Ru atom triggering a better deprotonation of bridge oxygen atom in Ru-O_(bri)-Mn structure evidenced by pH-independent cyclic voltammetry ***,RuO_(2)/MnO_(2)sustains its acidic OER activity within 20 h,longer than commercial RuO_(2).The membrane electrode assembly(MEA)test suggests than only 2.18 V is required to achieve a current density of 5 A/cm^(2).The theoretical calculation reveals that the e_(g)filling of Ru atom is increased from 2.18 to 2.39 after MnO_(2)incorporation,reducing the energy for the formation of∗OOH moiety.

关键词： Oxygen evolution reaction Polymer electrolyte membrane water electrolysis Deprotonation e_(g)filling Heterostructure

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Spinel ferrite with excellent broadband infrared radiation properties for thermal management of electronics

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Ceramics International 2025年

作者： He, Lintao Zhu, Wanting Wang, Yixin Nie, Xiaolei Zhang, Yu Wei, Ping Zhao, Wenyu Zhang, Qingjie State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China

Electronic equipment faces increasing challenges related to heat dissipation due to miniaturization, high power, and integration advancements. Infrared radiation refrigeration offers numerous advantages, including zero energy consumption and pollution with minimal space occupation, making it highly compatible with the heat dissipation requirements of electronic equipment. However, advancing infrared radiative cooling technology for thermal management requires further research to develop broadband infrared transmitting materials with excellent performance. In this study, the spinel MeFe2O4 (Me = Cu, Mn, Ni, Co, Mg, Zn) powders were prepared through chemical co-precipitation and their emissivity was assessed in various wavebands (3–5, 8–14, 2.5–25, and 1–22 μm). The results showed that spinel ferrite materials displayed outstanding broadband infrared radiative properties. Among them, MnFe2O4 reached the highest emissivity values (0.90, 0.97, 0.96, and 0.97, respectively), suggesting that narrowing the bandgap and improving carrier concentration increases emissivity in the 3–5 μm waveband. Emissivity in the 8–14 μm waveband was also boosted by increasing lattice asymmetry and lattice strain. Furthermore, the MnFe2O4 powder was mixed with PVDF and Graphene, thereby yielding a flexible heat dissipation film. This MnFe2O4/Graphene/PVDF composite film lowered the surface temperature of electronic devices from 90.8 to 83.2 °C at an ambient temperature of 20 °C under operating conditions of approximately 9 W. This study provides an experimental paradigm for designing and optimizing radiative cooling materials for the thermal management of electronic devices. © 2025 Elsevier Ltd and Techna Group S.r.l.

关键词： Ferrite devices

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Protein Immobilization Inspired Lysosomal Disruption for Efficient Nuclear Drug Delivery

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ACS Applied materials and Interfaces 2025年第20期17卷 29407-29423页

作者： Deng, Qiu-Ying Zhang, Lu Zhou, Lei Xia, Zhi-Yu Chen, Si-Lin Peng, Hao-Liang Guo, Xin-Yi Zhang, Chu-Yu Gao, Hai-Yu Cheng, Dong-Bing Fu, Zhengyi School of Chemistry Chemical Engineering & Life Science Wuhan University of Technology No.122 Luoshi Road Wuhan430070 China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology 122 Luoshi Road Wuhan430070 China Hubei Longzhong Laboratory Wuhan University of Technology Xiangyang Demonstration Zone Hubei Xiangyang441000 China

The high metabolism and excessive growth of tumor cells result in the development of a tumor microenvironment (TME) and enhanced lysosomal activity within the cells, which can eliminate chemotherapeutics. Consequently, the design of nanocarriers that respond to TME and target tumor cell lysosomes represents an optimal strategy to enhance drug specificity and utilization efficiency. Herein, inspired by protein immobilization, a dual-responsive supramolecular nanomedicine FPA/DOX is developed for specifically targeting the TME and tumor cell lysosomes. Upon hypoxia and acidic response, FPA/DOX exposes benzaldehyde groups that engage with amino groups on lysosomal proteins by protein covalent immobilization reaction─an imidization condensation reaction, leading to protein denaturation and inactivation and inducing lysosomal membrane permeabilization (LMP). This LMP process not only triggers lysosomal-dependent cell death (LDCD) but also facilitates the rapid translocation of released DOX into the cell nucleus. In vitro experiments have demonstrated that the tumor cell toxicity of FPA/DOX is 4.2 times that of free DOX. Additionally, in vivo studies have verified the high biosafety of FPA/DOX, with a remarkable tumor inhibition rate of 95.27%. In summary, the lysosomal disruption inspired by protein immobilization has pioneered an approach for tumor treatment and holds great potential in biomedical applications. © 2025 American Chemical Society.

关键词： Controlled drug delivery

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Modulation of the octahedral structure and potential superconductivity of La_(3)Ni_(2)O_(7)through strain engineering

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Science China(Physics,Mechanics & Astronomy) 2025年第3期68卷 145-152页

作者： Zihao Huo Zhihui Luo Peng Zhang Aiqin Yang Zhengtao Liu Xiangru Tao Zihan Zhang Shumin Guo Qiwen Jiang Wenxuan Chen Dao-Xin Yao Defang Duan Tian Cui Key Laboratory of Material Simulation Methods&Software of Ministry of Education State Key Laboratory of Superhard MaterialsCollege of PhysicsJilin UniversityChangchun130012China Center for Neutron Science and Technology Guangdong Provincial Key Laboratory of Magnetoelectric Physics and DevicesState Key Laboratory of Optoelectronic Materials and TechnologiesSchool of PhysicsSun Yat-sen UniversityGuangzhou510275China MOE Key Laboratory for Non-equilibrium Synthesis and Modulation of Condensed Matter Shaanxi Province Key Laboratory of Advanced Functional Materials and Mesoscopic PhysicsSchool of PhysicsXi’an Jiaotong UniversityXi’an710049China Institute of High Pressure Physics School of Physical Science and TechnologyNingbo UniversityNingbo315211China

The recent transport measurements of La_(3)Ni_(2)O_(7)uncovered a“right-triangle”shape of the superconducting dome in the pressure-temperature(P-T)phase *** by this,we perform theoretical first-principles studies of La_(3)Ni_(2)O_(7)with the pressure ranging from 0 to 100 ***,we reveal a pressure dependence of the Ni-d_(z^(2))electron density at the Fermi energy(n_(z)^(E_(F)))that highly coincides with such *** this basis,we further explore the electronic structure under uniaxial *** tracking the stress response of n_(z)^(E_(F)),we propose that superconductivity can be achieved by applying only ~2GPa of compression along the c *** idea is further exemplified from the perspectives of lattice distortion,band structure,Fermi surface and superconducting phase *** also discuss the possible charge modulation under the stress and provide an insight into the relation between nz E Fand the superconducting T_(c)in La_(3)Ni_(2)O_(7)*** study provides new routes to the search of high-T_(c)superconductors in future experiments.

关键词： nickelate superconductors density functional theory strong correlated systems strain engineering

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Enhanced room temperature CO2 photoreduction on gas-solid interfaces using nanocrystals integrated with ZIF-8 wrapping design

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材料科学技术（英文版） 2025年第6期209卷 55-63页

作者： Xiaoxiong Hou Zhuangzhuang Ma Zhilei Zhang Xiaotong Gao Hongqiang Wang Lichao Jia Key Laboratory of Applied Surface and Colloid Chemistry Shaanxi Key Laboratory for Advanced Energy DevicesShaanxi Engineering Lab for Advanced Energy TechnologySchool of Materials Science and EngineeringNational Ministry of EducationShaanxi Normal UniversityXi'an 710119China Beijing National Laboratory for Molecular Sciences Key Laboratory of Organic SolidsInstitute of ChemistryChinese Academy of SciencesBeijing 100190China University of the Chinese Academy of Sciences Beijing 100049China State Key Laboratory of Solidification Processing Center for Nano Energy MaterialsSchool of Materials Science and EngineeringNorthwestern Polytechnical University and Shaanxi Joint Laboratory of GrapheneXi'an 710072China

Composites derived from metal-organic frameworks(MOFs)show promise as catalysts for the photocat-alytic reduction of ***,their potential is hindered by constraints such as limited light absorp-tion and sluggish electron transfer and separation,impacting the overall efficiency of the photocatalytic *** this study,TiO2 nanocrystals,modified with Ptx+,underwent laser etching were encapsulated within the traditional MOF-ZIF-8 *** enhanced the adsorption capabilities for CO2 reactants and solar light,while also facilitating directed electron transfer and the separation of photogenerated *** finely-tuned catalyst demonstrates impressive CH4 selectivity at 9.5％,with yields of 250.24 μmol g-1 h-1 for CO and 25.43 μmol g-1 h-1 for CH4,utilizing water as a hole trap and H+*** study demonstrates the viability of achieving characteristics related to the separation of photogen-erated charges in TiO2 nanocrystals through laser etching and MOF composite *** offers novel perspectives for designing MOF-based catalysts with enhanced performance in artificial photosynthesis.

关键词： CO2 photoreduction Nanocrystals TiO2 ZIF-8 Wrapping structure

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Damage characteristics of low-velocity impact of hybrid laminates made of thick- and thin-plies

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Fuhe Cailiao Xuebao/Acta Materiae Compositae Sinica 2025年第5期42卷 2595-2606页

作者： Zheng, Kaidong Chen, Hongda Cai, Wei Cao, Dongfeng Hu, Haixiao Li, Ruiqi Li, Shuxin National Energy Key Laboratory for New Hydrogen-ammonia Energy Technologies Foshan Xianhu Laboratory Foshan528200 China State Key Laboratory of Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China Hubei Key Laboratory of Theory and Application of Advanced Materials Mechanics Wuhan University of Technology Wuhan430070 China Institute of Advanced Materials and Manufacturing Technology Wuhan University of Technology Wuhan430070 China

The ply level hybridization design employs multiple thin layers instead of a single thick layer, resulting in an increased complexity of the interface. To investigate the hybrid effect between thick and thin plies of laminated composites subjected to low-velocity impact loading, two hybrid laminates were designed based on the quasi-isotropic stacking sequence. The low-velocity impact (LVI) tests including the baseline laminate and hybrid laminates were carried out. The ultrasonic C-scan and de-ply technology were respectively used to make a nondestructive and destructive detection on laminates with impact damages. Impact damages were qualitatively and quantitatively evaluated based on the detection results. Subsequently, the performances and failure modes of compression after impact (CAI) were analyzed. Experimental results show that hybrid design of thick- and thin- plies makes full use of the damage suppression characteristics of thin-ply composite, improves the impact damage resistance of composite structures, reduces the projected delamination area and total interface delamination area, shortens the distance between the largest single delamination and the neutral layer, and significantly improves the CAI strength of composite structures. The outputs of this experimental research serves as an indication for the optimal design and safety evaluation of hybrid structures. © 2025 Beijing University of Aeronautics and Astronautics (BUAA). All rights reserved.

关键词： Delamination

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Plasma-assisted fabrication of multiscale materials for electrochemical energy conversion and storage

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Carbon Energy 2025年第2期7卷 144-171页

作者： Chen Li Tengfei Zhang Zhong Qiu Beirong Ye Xinqi Liang Xin Liu Minghua Chen Xinhui Xia Chen Wang Wangjun Wan Yongqi Zhang Institute of Fundamental and Frontier Sciences University of Electronic Science and Technology of ChinaChengduChina Key Laboratory of Engineering Dielectric and Applications(Ministry of Education) School of Electrical and Electronic EngineeringHarbin University of Science and TechnologyHarbinChina State Key Laboratory of New Textile Materials and Advanced Processing Technology Wuhan Textile UniversityWuhanChina College of Materials Science and Engineering Zhejiang University of TechnologyHangzhouChina School of Materials Science and Engineering Zhejiang UniversityHangzhouChina Zhejiang Academy of Science and Technology for Inspection and Quarantine HangzhouChina

Plasma,the fourth state of matter,is characterized by the presence of charged particles,including ions and *** has been shown to induce unique physical and chemical ***,there have been increased applications of plasma technology in the field of multiscale functional materials'preparation,with a number of interesting *** review will begin by introducing the basic knowledge of plasma,including the definition,typical parameters,and classification of plasma *** this,we will provide a comprehensive review and summary of the applications(phase conversion,doping,deposition,etching,exfoliation,and surface treatment)of plasma in common energy conversion and storage systems,such as electrocatalytic conversion of small molecules,batteries,fuel cells,and *** article summarizes the structure-performance relationships of electrochemical energy conversion and storage materials(ECSMs)that have been prepared or modified by *** also provides an overview of the challenges and perspectives of plasma technology,which could lead to a new approach for designing and modifying electrode materials in ECSMs.

关键词： electrocatalysts energy conversion and storage nanomaterials plasma

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