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Tunable magnetism and band structure in kagome materials RETi3Bi4 family with weak interlayer interactions

science Bulletin 2024年第17期69卷 2660-2664页

作者： Jingwen Guo Liqin Zhou Jianyang Ding Gexing Qu Zhengtai Liu Yu Du Heng Zhang Jiajun Li Yiying Zhang Fuwei Zhou Wuyi Qi Minghui Cui Yongxin Zhang Fengyi Guo Tianqi Wang Fucong Fei Yaobo Huang Tian Qian Dawei Shen You Song Hongming Weng Fengqi Song national laboratory of solid state microstructures School of PhysicsSchool of Materials Science and Intelligent EngineeringCollaborative Innovation Center of Advanced MicrostructuresNanjing UniversityNanjing 210093China Beijing national laboratory for Condensed Matter Physics Institute of PhysicsChinese Academy of SciencesBeijing 100190China university of Chinese Academy of sciences Beijing 100049China state Key laboratory of Functional materials for Informatics Shanghai Institute of Microsystem and Information Technology(SIMIT)Chinese Academy of SciencesShanghai 200050China Shanghai Synchrotron Radiation Facility Shanghai Advanced Research InstituteChinese Academy of SciencesShanghai 201210China state Key laboratory of Coordination Chemistry School of Chemistry and Chemical EngineeringNanjing UniversityNanjing 210023China Atom Manufacturing Institute Nanjing 211806China national Synchrotron Radiation laboratory University of Science and Technology of ChinaHefei 230029China Songshan Lake materials laboratory Dongguan 523808China

Kagome lattice,characterized by two-dimensional honeycomb network of corner-sharing triangles[1],presents flat bands,Dirac cones,and van Hove singularities(VHSs),which have been theoretically predicted and experimentally observed[2-4].When combined with spin-orbit coupling(SOC)and magnetism,novel properties have *** kagome materials vary,most of their strong interlayer interactions make the synthesized crystals not layered,and the properties deviating from the raw two-dimensional kagome *** crystals are difficult to fabricate into thin devices and to tune the physical properties of the materials using gate voltage.

关键词： network interlayer structure

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Coupling of Adhesion and Anti‑Freezing Properties in Hydrogel Electrolytes for Low‑Temperature Aqueous‑Based Hybrid Capacitors

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Nano-Micro Letters 2024年第2期16卷 15-31页

作者： Jingya Nan Yue Sun Fusheng Yang Yijing Zhang Yuxi Li Zihao Wang Chuchu Wang Dingkun Wang Fuxiang Chu Chunpeng Wang Tianyu Zhu Jianchun Jiang Institute of Chemical Industry of Forest Products Chinese Academy of ForestryKey Laboratory of Biomass Energy and MaterialJiangsu ProvinceNanjing 210042JiangsuPeople’s Republic of China Co‑Innovation Center of Efficient Processing and Utilization of Forest Resources Nanjing Forestry UniversityNanjing 210037JiangsuPeople’s Republic of China Energy Technologies Area Lawrence Berkeley National LaboratoryBerkeleyCA 94720USA department of materials science and engineering Clemson UniversityClemsonSC 29634USA

solid-state zinc-ion capacitors are emerging as promising candidates for large-scale energy storage owing to improved safety,mechanical and thermal stability and easy-to-direct *** electrolytes are appealing solid-state electrolytes because of eco-friendliness,high conductivity and intrinsic ***,the electrolyte/electrode interfacial contact and anti-freezing properties of current hydrogel electrolytes are still challenging for practical applications of zinc-ion ***,we report a class of hydrogel electrolytes that couple high interfacial adhesion and anti-freezing *** synergy of tough hydrogel matrix and chemical anchorage enables a well-adhered interface between hydrogel electrolyte and ***,the cooperative solvation of ZnCl2 and LiCl hybrid salts renders the hydrogel electrolyte high ionic conductivity and mechanical elasticity simultaneously at low *** significantly,the Zn||carbon nanotubes hybrid capacitor based on this hydrogel electrolyte exhibits low-temperature capacitive performance,delivering high-energy density of 39 Wh kg^(-1)at-60°C with capacity retention of 98.7%over 10,000 *** the benefits of the well-adhered electrolyte/electrode interface and the anti-freezing hydrogel electrolyte,the Zn/Li hybrid capacitor is able to accommodate dynamic deformations and function well under 1000 tension cycles even at-60°*** work provides a powerful strategy for enabling stable operation of low-temperature zinc-ion capacitors.

关键词： Interfacial adhesion Anti-freezing Hydrogel electrolytes Low-temperature hybrid capacitors Dynamic deformati

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Strain‑Induced Surface Interface Dual Polarization Constructs PML‑Cu/Bi_(12)O_(17)Br_(2) High‑Density Active Sites for CO_(2) Photoreduction

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Nano-Micro Letters 2024年第5期16卷 169-183页

作者： Yi Zhang Fangyu Guo Jun Di Keke Wang Molly Meng‑Jung Li Jiayu Dai Yuanbin She Jiexiang Xia Huaming Li School of Chemistry and Chemical engineering Institute for Energy ResearchSchool of the Environment and Safety EngineeringJiangsu UniversityZhenjiang 212013People’s Republic of China state Key laboratory Breeding Base of Green Chemistry‑Synthesis Technology College of Chemical EngineeringZhejiang University of TechnologyHangzhou 310014People’s Republic of China College of science and Hunan Key Laboratory of Extreme Matter and ApplicationsNational University of Defense TechnologyChangsha 410073People’s Republic of China department of Applied Physics The Hong Kong Polytechnic UniversityHung HomHong KongPeople’s Republic of China School of Chemistry and Chemical engineering National Special Superfine Powder Engineering Research CenterNanjing University of Science and TechnologyNanjing 210094People’s Republic of China Key laboratory of the Ministry of Education for Advanced Catalysis materials Zhejiang Normal UniversityJinhua 321004People’s Republic of China

The insufficient active sites and slow interfacial charge trans-fer of photocatalysts restrict the efficiency of CO_(2) *** synchronized modulation of the above key issues is demanding and ***,strain-induced strategy is developed to construct the Bi–O-bonded interface in Cu porphyrin-based monoatomic layer(PML-Cu)and Bi_(12)O_(17)Br_(2)(BOB),which triggers the surface interface dual polarization of PML-Cu/BOB(PBOB).In this multi-step polarization,the built-in electric field formed between the interfaces induces the electron transfer from con-duction band(CB)of BOB to CB of PML-Cu and suppresses its reverse ***,the surface polarization of PML-Cu further promotes the electron converge in Cu *** introduction of PML-Cu endows a high density of dispersed Cu active sites on the surface of PBOB,significantly promoting the adsorption and activation of CO_(2) and CO *** conversion rate of CO_(2) photoreduction to CO for PBOB can reach 584.3μmol g-1,which is 7.83 times higher than BOB and 20.01 times than *** work offers valuable insights into multi-step polarization regulation and active site design for catalysts.

关键词： Bi_(12)O_(17)Br_(2) Porphyrin CO_(2)photoreduction Polarization Active sites

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Towards high-strength cold spray additive manufactured metals:Methods,mechanisms,and properties

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Journal of materials science & Technology 2024年第3期170卷 47-64页

作者： Shuo Yin Ningsong Fan Chunjie Huang Yingchun Xie Chao Zhang Rocco Lupoi Wenya Li department of Mechanical Manufacturing&Biomedical EngineeringParsons BuildingTrinity College DublinThe University of DublinDublin 2Ireland Institute of materials Technology Helmut-Schmidt-University/University of the Federal Armed Forces HamburgHamburg 22043Germany The Key Lab of Guangdong for Modern Surface engineering Technology National Engineering Laboratory for Modern Materials Surface Engineering TechnologyInstitute of New MaterialsGuangdong Academy of SciencesGuangzhou 510651China College of Mechanical engineering Yangzhou UniversityYangzhou 225127China state Key laboratory of solidification Processing Shaanxi Key Laboratory of Friction Welding TechnologiesNorthwestern Polytechnical UniversityXi’an 720072China

Cold spray,as a solid-state additive manufacturing process,has been attracting increasing attention from both scientific and industrial ***,cold-sprayed deposits generally have unfavorable mechanical properties in their as-fabricated state compared to conventionally manufactured and fusion-based additive-manufactured counterparts due to the inherent microstructural defects in the deposits(e.g.,porosity and incomplete interparticle bonding).This downside reduces its competitiveness and limits its wide applications as an additive manufacturing *** the past years,many strengthening technologies have been developed or introduced to adjust the microstructure and improve the mechanical properties of cold-sprayed *** term“strengthening”in this work specifically refers to improving the mechanical strength,particularly the tensile strength of the cold-sprayed bulk *** to the stage that the strengthening technologies are used in the cold spray process,they can be classified into three categories:pre-process(e.g.,powder heat treatment),in-process(e.g.,powder heating,in-situ micro-forging,laser-assisted cold spray),and post-process(e.g.,post heat treatment,hot isostatic pressing,hot rolling,friction stir processing).Therefore,a comprehensive review of these strengthening technolo-gies is conducted to illuminate the possible correlations between the strengthening mechanisms and the resultant deposit microstructures and mechanical *** review paper aims to help researchers and engineers well understand the different strengthening methods and provide guidance for the cold spray community to develop new strengthening strategies for future high-quality mass production.

关键词： Cold spray Additive manufacturing Strengthening Microstructure Ductility Tensile strength

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Experimental study of solid-liquid origami composite structures with improved impact resistance

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Theoretical & Applied Mechanics Letters 2024年第2期14卷 118-123页

作者： Shuheng Wang Zhanyu Wang Bei Wang Zhi Liu Yunzhu Ni Wuxing Lai Shan Jiang Yong An Huang AML Department of Engineering MechanicsLaboratory of Flexible Electronics TechnologyTsinghua UniversityBeijing 100084China Institute of Advanced Structure Technology Beijing Key Laboratory of Lightweight Multi-functional Composite Materials and StructuresBeijing Institute of TechnologyBeijing 100081China Hangzhou Institute of Technology Xidian UniversityHangzhou 311200China nanjing Research Institude of Electronics Technology Nanjing 210039China The Institute of engineering Thermophysics Chinese Academy of SciencesBeijing 100190China state Key laboratory of Intelligent Manufacturing Equipment and Technology Huazhong University of Science and TechnologyWuhan 430074China

In this paper,a liquid-solid origami composite design is proposed for the improvement of impact *** this design strategy,Kresling origami composite structures with different fillings were designed and fabricated,namely air,water,and shear thickening fluid(STF).Quasi-static compression and drop-weight impact experiments were carried out to compare and reveal the static and dynamic mechanical behavior of these *** results from drop-weight impact experiments demonstrated that the solid-liquid Kresling origami composite structures exhibited superior yield strength and reduced peak force when compared to their empty ***,the Kresling origami structures filled with STF exhibited significantly heightened yield strength and reduced peak *** example,at an impact velocity of 3 m/s,the yield strength of single-layer STF-filled Kresling origami structures increased by 772.7%and the peak force decreased by 68.6%.This liquid-solid origami composite design holds the potential to advance the application of origami structures in critical areas such as aerospace,intelligent protection and other important *** demonstrated improvements in impact resistance underscore the practical viability of this approach in enhancing structural performance for a range of applications.

关键词： solid-liquid design Origami structure Impact resistance Shear thickening fluid

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利用两种兼容的M系列受体材料提升有机光伏共混相激子扩散常数从而增强器件效率（英文）

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science China materials 2024年

作者：李祎欧阳焱妮付慧婷马云龙张春峰郑庆东 state Key laboratory of Coordination Chemistry College of Engineering and Applied Sciences Nanjing University national laboratory of solid state microstructures School of Physics and Collaborative Innovation Center for Advanced Microstructures Nanjing University Shenzhen Research Institute of nanjing university state Key laboratory of Structural Chemistry Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences

M系列受体材料因其优异的光电性能和简便的合成方法,在有机太阳能电池(OSC)中展现出广阔的应用前景.为了进一步提升其光伏性能,我们选择了两种化学结构相似但带隙不同的M系列受体材料(M36和M13),将其用于构建双受体三元OSC.研究结果表明...

M系列受体材料因其优异的光电性能和简便的合成方法,在有机太阳能电池(OSC)中展现出广阔的应用前景.为了进一步提升其光伏性能,我们选择了两种化学结构相似但带隙不同的M系列受体材料(M36和M13),将其用于构建双受体三元OSC.研究结果表明,由于M36和M13之间相容性良好,能够在受体混合物中形成均匀的混合相,从而增大激子扩散长度并提升激子分离效率.将聚合物给体PM6与之混合后,形成的三元活性层展现出比基于M36和M13的二元活性层体系更理想的相分离微结构和增强的结晶有序性,从而实现了更好的载流子输运并降低了电荷复合的几率.因此与相应的二元器件相比,该三元器件的填充因子和光电流皆显著提高,最终实现了更高的光电转换效率(17.4%).

关键词：

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三合一设计策略促进超细PtNiW@WOx核壳纳米线氢氧化电催化剂的CO耐受性

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science China materials 2024年第6期67卷 1866-1875页

作者：刘巍杨馥榕孙土来黄晨明赖文川杜佳峰叶进裕曾昱嘉高磊黄宏文 College of materials science and engineering Hunan UniversityChangsha 410082China Center for Electron Microscopy State Key Laboratory Breeding Base of Green Chemistry Synthesis Technology and College of Chemical EngineeringZhejiang University of TechnologyHangzhou 310014China College of Chemistry and materials science Nanjing Normal UniversityNanjing 210023China state Key laboratory for Physical Chemistry of solid Surfaces Collaborative Innovation Center of Chemistry for Energy MaterialsDepartment of ChemistryCollege of Chemistry and Chemical EngineeringXiamen UniversityXiamen 361005China Key laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province College of Physics and Optoelectronic EngineeringShenzhen UniversityShenzhen 518060China Shenzhen Research Institute of Hunan university Shenzhen 518055China

铂(Pt)是质子交换膜燃料电池(PEMFCs)阳极氢氧化反应(HOR)中最先进的电催化剂.然而,Pt催化剂对CO(工业低成本氢燃料中的杂质)极度敏感从而中毒,这会引起器件性能的急剧衰退,导致器件运行成本高.因此,提高Pt催化剂的CO耐受性对PEMFCs的... 详细信息

铂(Pt)是质子交换膜燃料电池(PEMFCs)阳极氢氧化反应(HOR)中最先进的电催化剂.然而,Pt催化剂对CO(工业低成本氢燃料中的杂质)极度敏感从而中毒,这会引起器件性能的急剧衰退,导致器件运行成本高.因此,提高Pt催化剂的CO耐受性对PEMFCs的商业化推广至关重要.在此,我们设计合成了一种独特的PtNiW@WO_(x)核壳纳米线来提高Pt基催化剂对CO的耐受能力.机理研究表明,表面无定形的WO_(x)壳层可以作为分子围栏,在动力学上阻碍CO扩散到达Pt位点.在热力学上,Ni和W元素合金化产生的电子效应可以使Pt的d带中心降低,减弱CO在Pt位点上的化学吸附.此外,亲氧W元素可以加速水的解离,提供更多OH活性物种,促进CO的氧化脱附.因此,在1000ppm CO/H_(2)条件下,所设计的PtNiW@WO_(x)核壳纳米线催化剂表现出优异的HOR抗CO中毒性能,在4000 s后仍能保持超过90%的HOR电流密度,超过了原始的PtNi纳米线和目前报道的绝大多数Pt基催化剂.

关键词： hydrogen oxidation reaction Pt-based electrocatalyst CO tolerant fuel cell catalyst design

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磁有序CoH_(2)SeO_(4)薄片中的室温铁电性

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science China materials 2024年第5期67卷 1654-1660页

作者：陈璐秋余冰沈阳刘逸飞王号南冯光迪朱秋香罗卫东刘俊明万建国赵庆彪田博博褚君浩段纯刚 Key laboratory of Polar materials and Devices(MOE) Shanghai Center of Brain-inspired Intelligent Materials and Devicesand Department of ElectronicsEast China Normal UniversityShanghai200241China Zhejiang Lab Hangzhou310000China laboratory of solid state microstructures and Innovation Center of Advanced microstructures Nanjing UniversityNanjing210093China Key laboratory of Artificial Structures and Quantum Control School of Physics and AstronomyShanghai Jiao Tong UniversityShanghai200240China School of Chemistry and Environmental engineering Wuhan Institute of TechnologyWuhan430205China state Key laboratory of Infrared Physics Shanghai Institute of Technical PhysicsChinese Academy of SciencesShanghai200083China Institute of Optoelectronics Fudan UniversityShanghai200433China Collaborative Innovation Center of Extreme Optics Shanxi UniversityTaiyuan030006China

本文通过第一性原理计算和实验表征证明了二维CoH_(2)SeO_(4)薄膜的磁有序和滑移铁电性.首先,实验结果证实了粉末CoH_(2)SeO_(4)样品的反铁磁序.同时,第一性原理计算表明单层CoH_(2)SeO_(4)具有反铁磁(AFM-I)基态(TN≈75 K),且预测了二... 详细信息

本文通过第一性原理计算和实验表征证明了二维CoH_(2)SeO_(4)薄膜的磁有序和滑移铁电性.首先,实验结果证实了粉末CoH_(2)SeO_(4)样品的反铁磁序.同时,第一性原理计算表明单层CoH_(2)SeO_(4)具有反铁磁(AFM-I)基态(TN≈75 K),且预测了二维CoH_(2)SeO_(4)薄膜具有以不对称的三重势阱态为特征的滑移铁电性,并在实验中测得了180°压电滞回线、可反转铁电畴和二次谐波信号.此外,在基于二维CoH_(2)SeO_(4)薄膜的电容器中获得铁电材料所特有的电滞回线和蝴蝶状的电容曲线.介电温谱测试表明二维CoH_(2)SeO_(4)薄膜的铁电转变温度约为370 ***_(2)SeO_(4)中滑移铁电性和反铁磁性的出现为获得低维多铁材料指出了一条新的途径.

关键词： two-dimensional materials sliding ferroelectricity multiferroic materials

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A Review on Diverse Silver Nanostructures

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Journal of materials science & Technology 2010年第6期26卷 487-522页

作者： S.Vongehr national laboratory of solid state microstructures Department of Materials Science and EngineeringNanjing University

This article reviews recent advances in the utilization of various water based synthesis routes towards the shape-controlled synthesis of silver nanoparticles and microstructures in a diverse range of shapes and sizes from several nanometers to micrometers. A variety of very simple one-pot methods, at times employing com- mercial microwave ovens, inexpensive low power ultrasound cleaners, or two-electrode electro-chemistry, can be surprisingly effective in the controlled synthesis of a wide range of nanostructured products, if only parameters are carefully chosen. Many approaches which are adopted include synthesis of Ag nanostructures with various shapes in solution, doping of Ag nanoparticles on unmodified silica and on/inside carbon spheres, kinetically controlled growth of Ag micro-particles with novel nanostructures on flat substrates, and galvanic replace- ment towards bimetallic Ag-Au dendrites and carbon composites. Characterizations of shape, composition and microstructure are carried out via scanning and transmission electron microscopy, various spectroscopy methods, N2 absorption measurements and suchlike. The involved growth mechanisms are investigated in order to discover new means towards better control. Size, location and shape control, including micro- and nanostructure features, allows tuning the products properties towards desired applications. We focus on the optical properties and catalytic activities, but also the stability of compounds can be an issue of interest.

关键词： Silver Nanostructures Synthesis Thermal stability Surface plasmon resonance Catalysis

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Collision statistics of clusters:from Poisson model to Poisson mixtures

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Chinese Physics B 2010年第2期19卷 225-233页

作者： Sascha Vongehr 唐少春孟祥康 national laboratory of solid state microstructures Department of Materials Science and EngineeringNanjing University

Clusters traverse a gas and collide with gas particles. The gas particles are absorbed, and the clusters become hosts. If the clusters are size-selected, the number of guests will be Poisson distributed. We review this by showcasing four laboratory procedures that all rely on the validity of the Poisson model. The effects of a statistical distribution of the clusters＇ sizes in a beam of clusters are discussed. We derive the average collision rates. Additionally, we present Poisson mixture models that also involve standard deviations. We derive the collision statistics for common size distributions of hosts and also for some generalizations thereof. The models can be applied to large noble gas clusters traversing doping gas. While outlining how to fit a generalized Poisson to the statistics, we still find even these Poisson models to be often insufficient.

关键词： collision statistics helium droplets clusters Poisson statistics

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