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Combination of methylthio-chemistry with living crystallization-driven self-assembly toward uniformπ-conjugated nanostructures with antibacterial activity,surface tailorability,tunable morphology and dimension

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science China Chemistry 2024年第7期67卷 2341-2352页

作者： Chuyu Duan Binbin Xu Ruru Li Xiaoyu Huang Shaoliang Lin Chun Feng Shanghai Key Laboratory of Advanced Polymeric Materials School of Materials Science and EngineeringEast China University of Science and TechnologyShanghai 200237China School of Chemistry and Materials Science Hangzhou Institute for Advanced StudyUniversity of Chinese Academy of SciencesHangzhou 310024China Key Laboratory of Fluorine and Nitrogen Chemistry and Advanced Materials Shanghai Institute of Organic ChemistryChinese Academy of SciencesShanghai 200032China

Living crystallization-driven self-assembly(CDSA)provides robust access to uniformπ-conjugated nanostructures(CNSs)from block copolymers(BCPs)containing a crystallineπ-conjugated segment with controlled dimension,morphology and composition,which show appealing applications in biomedicine,photocatalysis and *** further expand the application spectrum of these CNSs,the development of facile strategies toward diverse CNSs with varying structures/functionalities is highly ***,BCPs consisting of oligo(p-phenylene ethynylene)-b-poly(polypropyl-3-methanethiol acrylate)(OPE_(9)-bPMTPA35and OPE_(9)-b-PMTPA_(58);the subscript represents the number of repeat unit of each block)consisting of a crystallineπ-conjugated core-forming OPE_(9)segment and a corona-forming PMTPA block are *** efficient“click-type”alkylation of methylthio groups,OPE_(9)-b-PMTPA with varying contents of sulfonium unit is *** ribbon-like micelles with different widths and lengths can then be generated in a controlled manner via the self-seeding approach of living ***,negatively charged polymeric and Ag nanoparticles can be immobilized on sulfonium/methylthio-containing shells by taking advantage of electrostatic attraction and coordination interaction,***,the ribbon-like micelles with positively charged shells exhibit antibacterial activity against *** the ease of modification of PMTPA-based shell and attractive opto-electronic/photocatalytic properties ofπ-conjugated units,the combination of methylthio-chemistry and living CDSA opens a new avenue to generate multi-functional CNSs for widespread applications from biomedicine to photocatalysis.

关键词： crystallization-driven self-assembly block copolymer π-conjugated nanostructure methylthio-chemistry

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advanced high-entropy alloys breaking the property limits of current materials

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Journal of materials science & Technology 2024年第19期186卷 219-230页

作者： Dongyue Li Peter K.Liaw Lu Xie Yong Zhang Wenrui Wang School of Mechanical Engineering University of Science and Technology BeijingBeijing 100083China Department of Materials Science and Engineering The University of TennesseeKnoxvilleTN 37996USA Beijing Advanced Innovation Center of Materials Genome Engineering State Key Laboratory for Advanced Metals and MaterialsUniversity of Science and Technology BeijingBeijing 100083China

The growing need for stronger and more ductile structural materials has spurred an intense search for innovative,high-performance ***,alloys face a pervasive trade-off:high strength often comes at the expense of ductility and vice *** advent of high-entropy alloys(HEAs)offering both high strength and ductility has transformed this *** this work,we discuss the deformation mechanisms of HEAs,examine the foundations of the strength-ductility trade-off,and explore approaches for designing HEAs to surmount this ***,we analyze the factors that govern HEA-deformation performance,which in turn influence the HEA *** also propose a perspective on future research directions concerning the mechanical behavior of HEAs,highlighting potential breakthroughs and novel strategies to advance the field.

关键词： High-entropy alloy Strength-ductility Trade-off Microstructure Deformation mechanism

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Fabrication and characterization of mullite fiber-based porous ceramics with mixed fiber lengths for high-temperature gas filtration

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Ceramics International 2025年第17期51卷 23214-23223页

作者： Zheng, Dazhi Zhu, Ruijian Hu, Yuwen Liang, Shiou Sun, Huiying Wang, Zengmei State Key Laboratory of Engineering Materials for Major Infrastructure Jiangsu Key Lab. of Construction Materials School of Materials Science and Engineering Southeast University Nanjing211189 China School of Materials Science and Engineering Jiangsu Key Laboratory of Advanced Structural Materials and Application Technology Nanjing Institute of Technology Nanjing211167 China

The emissions and particulate pollutants (PM) from industrialization and other human activities have become a significant threat to human health. Researchers have experimented with various fiber-bonded filters, but there are still relatively few products with good high-temperature resistance. In this paper, a fiber-bonded porous ceramic with high porosity was prepared by vacuum filtration combined with freeze-drying using two homemade mullite fibers with different length-to-diameter ratios as raw materials and mullite sol as binder. When the content of fine fibers is 40 %, the product has a better overall performance, its density is 0.63g/cm3, porosity is 74 %, strength is 0.77 MPa, thermal conductivity is 0.153 W m−1 K−1. When the airflow rate of 2 L/min, the pressure drop is 80 Pa, the filtration efficiency of about 99 %, the QF is 0.08 pa−1, The mullite fiber-bonded porous ceramics prepared through a simple process exhibit excellent filtration performance, offering a wide range of potential applications. © 2025

关键词： Thermal conductivity of gases

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Mainchain conformation ordering self-assembly tailored room temperature phosphorescence emission

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science China Chemistry 2025年第1期68卷 329-336页

作者： Yuzhu Li Yumeng Gao Feng Tian Yu Wang Yuan Yao Shaoliang Lin Xiang Ma Binbin Xu Shanghai Key Laboratory of Advanced Polymeric Materials Key Laboratory for Ultrafine Materials of Ministry of EducationSchool of Materials Science and EngineeringEast China University of Science and TechnologyShanghai 200237China Key Laboratory for Advance Materials and Feringa Noble Prize Scientist Joint Research Centre Frontiers Science for Materiobiology and Dynamic ChemistrySchool of Chemistry and Molecular EngineeringEast China University of Science&TechnologyShanghai 200237China Shanghai Synchrotron Radiation Facility Shanghai Advanced Research InstituteChinese Academy of SciencesShanghai 201204China

Developing organic room-temperature phosphorescence(RTP)materials with a wide range of tunable-emission is significant in expanding the applications of RTP ***,we rationally designed amphiphilic alternating copolymers poly(1,2-bis(4-alkoxyphenyl)ethane-1,2-dione-alt-(ethylene glycol)x)(P(Bz-alt-EGx))that combined the advantage of alternating benzil and EGxskeleton,and tunable mainchain *** a mainchain conformation ordering assembly(COA)process,P(Bz-alt-EGx)self-assembled into well-defined platelets,and such assemblies emitted blue RTP at ca.425 nm due to the ordered folded-chain conformation and confined *** contrast,traditional self-assembly(TA)of P(Bz-alt-EGx)obtained less ordered aggregates,such as asymmetric worms,vesicles,and rod-like *** resultant less ordered aggregates exhibited yellow-green RTP at ca.550 *** wide-tuning RTP emission in solution(between blue and yellow-green,over125 nm)is realized using the P(Bz-alt-EG_(x))alternating copolymers under the treatment of different self-assembly *** study uncovers a new strategy to tailor the RTP emission through different self-assembly pathways and holds great promise for the fabrication of advanced optical materials.

关键词： self-assembly conformation ordering alternating copolymer phosphorescence emission

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Regulating the electromagnetic balance of materials by electron transfer for enhanced electromagnetic wave absorption

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Journal of materials science & Technology 2024年第28期195卷 63-73页

作者： Kunyao Cao Weiping Ye Yue Zhang Lewei Shen Rui Zhao Weidong Xue Xiaoyu Yang School of Materials and Energy University of Electronic Science and Technology of ChinaChengdu 610054China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing&Shenzhen Research Institute&Joint Laboratory for Marine Advanced Materials Shenzhen 518063China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing and International School of Materials Science&Engineeringand School of Materials Science&EngineeringWuhan University of TechnologyWuhan 430070China School of Engineering and Applied Sciences Harvard UniversityCambridgeMassachusetts 02138United States

The fact that single dielectric loss materials have disadvantages of excessive conductivities and impedance mismatches has given rise to a large effort to develop effective strategies to fabricate electromagnetic wave(EMW)absorbing materials comprised of components that bring about a balance between dielectric loss and magnetic ***,little is known about the essential features that regulate EMW absorption *** study focused on the development of a new EMW absorbing material and gaining information about factors that govern EMW absorption *** materials at the center of the effort are light weight and porous cobalt sulfonated phthalocyanine-reduced graphene oxide(CoSPcrGO)aerogels that were synthesized by using a simple hydrothermal method followed by *** properties of these materials that contribute to the electromagnetic balance between dielectric and magnetic loss were elucidated by first formulating a reasonable hypothesis about how the relative orien-tation of the components in CoSPc-rGO govern p-conjugation and electron transfer from rGO to CoSPc,which is proposed to be a key factor contributing to the regulation of the electromagnetic *** relaxation process of materials was analyzed in detail using a variety of approaches including theoretical calculation,spectroscopic measurements,and experimental and simulation *** fabricated CoSPc-rGO aerogels that contain an ultra-low content of 4%were found to exhibit an extraordinary microwave absorption performance associated with a strong reflection loss of-53.23 dB and a broad effective absorption bandwidth of 8.04 *** results of this study should provide an effective guide for new designs of composite materials for EMW absorption.

关键词： Microwave absorption Polarization relaxation Electromagnetic balance Electrons transfer DFT calculation

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Concentrated perchlorate-based electrolyte facilitates Zn anode-compatible in situ solid electrolyte interphase

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稀有金属（英文版） 2025年第2期44卷 950-960页

作者： Yin-Sheng Li Li-Shan Geng Bo-Mian Zhang Zi-He Wei Hao Fan Jing-Hao Li Wen-Cong Feng Liang Zhou Sanya Science and Education Innovation Park Wuhan University of TechnologySanya 572000China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing School of Materials Science and EngineeringWuhan University of TechnologyWuhan 430070China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing School of Materials Science and EngineeringWuhan University of TechnologyWuhan 430070China Sanya Science and Education Innovation Park Wuhan University of TechnologySanya 572000China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing School of Materials Science and EngineeringWuhan University of TechnologyWuhan 430070China Hubei Longzhong Laboratory Wuhan University of Technology(Xiangyang Demonstration Zone)Xiangyang 441000China

Zinc perchlorate(Zn(ClO4)2)electrolytes have demonstrated favorable low-temperature performance in aqueous zinc-ion batteries(AZIBs).However,the Zn anode encounters serious dendrite formation and parasitic reactions in zinc perchlorate electrolytes,which is caused by the fast corrosive kinetics at room ***,a concentrated perchlorate-based electrolyte consisting of 4.0 M Zn(ClO4)2 and saturated NaClO4 solution is devel-oped to achieve dendrite-free and stable AZIBs at room *** ClO4-participates in the primary solva-tion sheath of Zn2+,facilitating the in situ formation of Zn5(OH)8Cl2·H2O-rich solid electrolyte interphase(SEI)to suppress the corrosion effect of ClO4-.The Zn anode protected by the SEI achieves stable Zn plating/stripping over 3000 ***,the MnO2‖Zn full cells manifest a stable specific capacity of 200 mAh·g-1 at 28 ℃ and 101 mAh·g-1 at-20 ℃.This work introduces a promising approach for boosting the room-temperature performance of perchlorate-based electrolytes for AZIBs.

关键词： Concentrated perchlorate-based electrolytes Solvation sheath Solid electrolyte interphase Dendrite-free Zn anode Aqueous zinc-ion batteries

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Layer-by-layer enriching active Ni-N_(3)C sites in nickel-nitrogen-carbon electrocatalysts for enhanced CO_(2)-to-CO reduction

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Chinese Chemical Letters 2023年第12期34卷 333-338页

作者： Yongqi Ren Ruopeng Chang Xu Hua Junjie Guo Guangping Hao Anhui Lu State Key Laboratory of Fine Chemicals Frontier Science Center for Smart MaterialsLiaoning Key Laboratory for Catalytic Conversion of Carbon ResourcesSchool of Chemical EngineeringDalian Universityof TechnologyDalian 116024China Key Laboratory of Interface Science and Engineering in Advanced Materials Ministry of EducationTaiyuan University of TechnologyTaiyuan 030024China

Transition metal and nitrogen co-doped carbons(M-N-C)have proven to be promising catalysts for CO_(2)electroreduction into co because of the high activity and *** enrichment of the active transition metal coordinated nitrogen sites is desirable but is challenging for a practical volumetric ***,we report four kinds of model electrocatalysts to unveil this issue,which include the NC structures with surface N-functionalities,Ni-N-CI with one layer of surface Ni-NsC sites,NC@Ni-N-CI with surface N-functionalities and underneath Ni-N3C sites as well as Ni-N-C_II with doubled surface Ni-NsC *** X-ray absorption spectroscopy indicates the coordination configuration of *** NC catalysts,when N-doping level increased from 3.5 at%to 8.4 at%,the CO partial current density increased from below 0.1 mA/cm^(2)to 3 mA/cm^(2).Introducing one layer of Ni-N_(3)C onto the NC structures leads to a 54 times higher CO partial current density than that of NC,in the meantime the FE_(CO) is 66 times ***,doubling the density of surface Ni-N_(3)C sites by a layer-by-layer method doubles the CO partial current density Gco,indicating its potential to achieve a high density of active coordinated sites and current densities.

关键词： Porous carbons Nanocarbons CO_(2)electroreduction M-N_(3)C structure Nonprecious electrocatalysts

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Dual effects of Co on microstructure stability in a Ru-containing Ni-based single crystal superalloys

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Progress in Natural science:materials International 2025年第2期35卷 313-321页

作者： Qinghai Pan Xinbao Zhao Wanshun Xia Quanzhao Yue Yang Song Yuefeng Gu Ze Zhang Institute of Superalloys Science and Technology School of Materials Science and Engineering Zhejiang University State Key Laboratory of Silicon and Advanced Semiconductor Materials School of Materials Science and Engineering Zhejiang University Chengdu Aerospace Superalloy Technology Co. Ltd

The guarantee of microstructure stability of a Ru-containing Ni-based single crystal superalloys（Ni-SXs） is key for prolonging the service life. As a potential substitute for Ru, the effects of Co on microstructures stability of a 4th generation Ni-SXs, including the precipitation of topologically close-packed（TCP） phases, coarsening of γ'phase and surface oxidation after heat exposure at 1100°C, are studied. The results show that Co has dual effects on the precipitation of TCP phases. It is inhibited inside Ni-SXs due to the decrease of concentration in Re, Cr, Mo, and Co in γ matrix. But the inhibition is alleviated to precipitate TCP phase in near-surface microstructures of the Ni-SXs containing 9 wt% Co after consumption of Co addition by the oxide. Therefore, a small amount of TCP phases precipitates in advance at the near-surface of the Ni-SXs. The increase of Co3O4and NiCo2O4with Co addition destroys the barrier of the continuous oxidation layer and goes against oxidation resistance. On the contrary, the increase of Co decelerates the coarsening of γ'phase at internal Ni-SXs, which is conducive to microstructures stability.

关键词： Cobalt Microstructural stability Oxidation Single crystal superalloys TCP phases

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Enhanced charge collection of AgNWs-based top electrode to realize high-performance,all-solution processed organic solar cells

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science China Chemistry 2024年第10期67卷 3347-3356页

作者： Juanyong Wan Yang Chen Weijie Chen Jinfeng Xia Guang Zeng Jianlei Cao Chuang Jin Yunxiu Shen Xiaoxiao Wu Haiyang Chen Junyuan Ding Xue-mei Ou Yaowen Li Yongfang Li Laboratory of Advanced Optoelectronic Materials Suzhou Key Laboratory of Novel Semiconductor-Optoelectronics Materials and DevicesCollege of ChemistryChemical Engineering and Materials ScienceSoochow UniversitySuzhou 215123China Jiangsu Key Laboratory of Advanced Negative Carbon Technologies Soochow UniversitySuzhou 215123China State and Local Joint Engineering Laboratory for Novel Functional Polymeric Materials Jiangsu Key Laboratory of Advanced Functional Polymer Design and ApplicationCollege of ChemistryChemical Engineering and Materials ScienceSoochow UniversitySuzhou 215123China Beijing National Laboratory for Molecular Sciences CAS Key Laboratory of Organic SolidsInstitute of ChemistryChinese Academy of SciencesBeijing 100190China Jiangsu Sidike New Materials Science and Technology Co. Ltd.Suqian 215400China

All-solution processed organic solar cells are the ultimate aim of printable photovoltaics,but their electrical losses arising from poor contact of top electrodes greatly limit efficiency *** solve the problem,a solution-processed hybrid top electrode was constructed using silver nanowires(AgNWs)as the skeleton and ZnO nanoparticles(ZnO-NPs)as the *** constructing the skeleton,a spin-rinsing treatment was first used to reduce the amount of the residual insulating polyvinylpyrrolidone wrapped around the AgNWs to promote intimate contact among the AgNWs in the ***,the ZnO-NPs matrix was deposited onto the AgNWs skeleton,bridging the AgNWs skeleton with the underlayer ZnO-NPs electron transporting layer(ETL).The underlayer ZnO-NPs ETL can also induce the growth of the ZnO-NPs matrix to minimize lattice mismatch,which creates additional transport channels from the ETL to the AgNWs skeleton for charge *** a result,the obtained electrode significantly enhances the electrical contact in the device,thus delivering record power conversion efficiencies of 16.04%and 14.54%for rigid and flexible all-solution processed OSCs,respectively.

关键词： solution-processed top electrode organic solar cells AgNWs electrical contact

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Efficient quantum dot sensitized solar cells via improved loading amount management

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Green Energy & Environment 2023年第1期8卷 213-223页

作者： Wei Wang Yiling Xie Fangfang He Yuan Wang Weinan Xue Yan Li Key Laboratory for Advanced Materials Shanghai Key Laboratory of Functional Materials ChemistrySchool of Chemistry and Molecular EngineeringEast China University of Science and TechnologyShanghai200237China

High light-harvesting efficiency and low interfacial charge transfer loss are essential for the fabrication of high-efficiency quantum dot-based solar cells(QDSCs). Increasing the thickness of mesoporous TiO2films can improve the loading of pre-synthesized QDs on the film and enhance the absorbance of photoanode, but commonly accompanied by the increase in the unfavorable charge recombination due to prolonged electron transmission paths. Herein, we systematically studied the influence of the balance between QD loading and TiO2film thickness on the performance of QDSCs. It is found that the relative thin photoanode prepared by the cationic surfactant-assisted multiple deposition procedure has achieved a high QD loading which is comparable to that of the thick photoanode commonly used. Under AM 1.5G illumination, Zn–Cu–In–Se and Zn–Cu–In–S based QDSCs with optimized 11.8 μm photoanodes show the PCE of 10.03% and 8.53%, respectively, which are comparable to the corresponding highest PCE of Zn–Cu–In–Se and Zn–Cu–In–S QDSCs(9.74% and 8.75%) with over 25.0 μm photoanodes. Similarly, an impressive PCE of 6.14% was obtained for the CdSe based QDSCs with a 4.1 μm photoanode, which is slightly lower than the best PCE(7.05%)of reference CdSe QDSCs with 18.1 μm photoanode.

关键词： Quantum dot sensitized solar cell Photoanode Loading amount Surfactant-assisted deposition

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