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National science Review 2023年第5期10卷 59-81页

作者： Bo Tao Zeyu Gong Han Ding State Key Laboratory of Digital Manufacturing Equipment and Technology School of Mechanical Science and EngineeringHuazhong University of Science and Technology

Robotized intelligent manufacturing is a growing trend in the manufacturing of large and complex components in aviation,aerospace,marine engineering and other *** their expansive workspaces and flexible deployment,climbing manufacturing robots can create a revolutionary manufacturing paradigm for large and complex *** paper defines the climbing manufacturing robot based on the application status of climbing robots and then analyzes four key technical re quirements:adhesion,locomotion,localization and ***,the current research status of climbing robots in these four areas is classified and reviewed,along with a clarification of the research frontiers and trends in each area,and the applicability of the relevant research to manufacturing-oriented climbing robotic systems is ***,by concluding the development trends of robotized intelligent manufacturing equipment in terms of manufacturing dimension and scale,environmental adaptability and cluster collaboration capability,we clarify the major challenges for climbing manufacturing robots in terms of adhesion principles,motion mechanisms,positioning technology and control methods,and propose future research directions in these fields.

关键词： climbing manufacturing robot climbing robot robotized intelligent manufacturing

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Scalable and Heavy Foam Functionalization by Electrode-Inspired Sticky Jammed Fluids for Efficient Indoor Air-Quality Management

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Energy & Environmental Materials 2023年第2期6卷 175-184页

作者： Yuan Ji Lei Jing Zhuxi Ni Bo Yin Mingbo Yang Wei Yang Yu Wang College of Polymer Science and Engineering State Key Laboratory of Polymer Materials EngineeringSichuan UniversityChengdu 610065China

Functionalization of polymer foams by surface coating is of great interest for advanced flow-interactive materials working with well-controlled 3D open ***,realizing heavy functional coating via a fast and recyclable way remains a big ***,inspired by the battery electrodes,we propose a scalable mechanic-assisted heavy coating strategy based on the design of sticky jammed fluid(SJF)to conquer the above *** to the electrode slurry,the SJF is dominated by a high concentration of active material(≥20 wt%of active carbon,for instance)uniformly dispersed in a protein binder *** to the sticky and solidrich nature of the SJF,one can realize a high coating efficiency of 60 wt%gain per *** critical factors controlling the coating processing and quality are further identified and ***,the functionalized foam is demonstrated as a high-performance shape-customizable toxic gas remover,which can absorb formaldehyde very efficiently at different circumstances,including static adsorption,flow-based filtration,and source ***,the foam skeleton and the active materials are easily recycled by a facile solvent *** study may inspire new scalable way for fast,heavy,and customizable functionalization of polymeric foams.

关键词： air filtration conductive foam catalysis functional polymer foams microadhesion-guided technology surface coating and functionalization

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Regulating the Photoisomerization of Covalent Organic Framework for Enhanced Photocatalytic Hydrogen Evolution

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Chinese Journal of Chemistry 2024年第21期42卷 2621-2626页

作者： Xingye Huang Jia Guo State Key Laboratory of Molecular Engineering of Polymers Department of Macromolecular ScienceFudan UniversityShanghai200438 China

Covalent organic framework(COF)is a desirable platform to tailor electronic properties for improving photocatalytic ***,the study on excited-state configurations that determine photogenerated carrier dynamics has long been ***,we concentrate on the molecular design ofβ-ketoenamine-linked COFs to drive their photoisomerization via the excited-state intra-molecular proton transfer(ESIPT),which can induce the partial keto-to-enol tautomerization and accordingly rearrange the photoinduced charge *** demonstrate that the push-pull electronic effect of functional side groups attached on the framework linkers is directly correlated with the ESIPT *** phenylene linkers modified with electron-withdrawing cyano-groups reinforce the ESIPT-induced tautomerization,leading to the in situ partial enolization for extendedπ-conjugation and rearranged electron-hole *** contrast,the electron-rich linkers limit the photoisomerization of COF and suppress the photoinduced electron ***,the maximum hydrogen evolution rate is achieved by the cyano-modified COF,reaching as high as 162.72 mmol·g^(-1)·h^(-1) with an apparent quantum efficiency of 13.44%at 475 nm,which is almost 11.5-fold higher than those of analogous COFs with electron-rich *** work opens up an avenue to control over the excited-state structure transformation for enhanced photochemical applications.

关键词： Covalent organic framework Hydrogen evolution reaction Photoisomerization Photocatalysis Charge separation Water splitting

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Effect of annealing on the electrical performance of N-polarity GaN Schottky barrier diodes

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Journal of Semiconductors 2024年第4期45卷 48-55页

作者： Nuo Xu Gaoqiang Deng Haotian Ma Shixu Yang Yunfei Niu Jiaqi Yu Yusen Wang Jingkai Zhao Yuantao Zhang State Key Laboratory of Integrated Optoelectronics College of Electronic Science and EngineeringJilin UniversityChangchun 130012China

A nitrogen-polarity(N-polarity)GaN-based high electron mobility transistor(HEMT)shows great potential for high-fre-quency solid-state power amplifier applications because its two-dimensional electron gas(2DEG)density and mobility are mini-mally affected by device ***,the Schottky barrier height(SBH)of N-polarity GaN is *** leads to a large gate leakage in N-polarity GaN-based *** this work,we investigate the effect of annealing on the electrical characteristics of N-polarity GaN-based Schottky barrier diodes(SBDs)with Ni/Au *** results show that the annealing time and tem-perature have a large influence on the electrical properties of N-polarity GaN *** to the N-polarity SBD without annealing,the SBH and rectification ratio at±5 V of the SBD are increased from 0.51 eV and 30 to 0.77 eV and 7700,respec-tively,and the ideal factor of the SBD is decreased from 1.66 to 1.54 after an optimized annealing *** analysis results suggest that the improvement of the electrical properties of SBDs after annealing is mainly due to the reduction of the inter-face state density between Schottky contact metals and N-polarity GaN and the increase of barrier height for the electron emis-sion from the trap state at low reverse bias.

关键词： nitrogen polarity GaN Schottky barrier diodes annealing interface state

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Multicolor emission from lanthanide ions doped lead-free Cs_(3)Sb_(2)Cl_(9) perovskite nanocrystals

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Journal of Rare Earths 2024年第5期42卷 940-946,I0005页

作者： He Shao Lifang Li Xiufeng Wu Lin Xu Biao Dong Donglei Zhou Xue Bai Hongwei Song State Key Laboratory of Organic Electronics and Information Displays&Institute of Advanced Materials College of Materials Science and EngineeringNanjing University of Posts&TelecommunicationsNanjing210023China State Key Laboratory of Integrated Optoelectronics College of Electronic Science and Engineering Jilin UniversityChangchun130012China

The toxicity of lead ions has become the severe challenge for the all-inorganic lead halide p erovskite materials,although some works have rep orted the lead-free perovskite nanocrystals(NCs),the photoluminescence quantum yield(PLQY)of these materials is still ***,because the halogen ions can be easily exchanged,the controllable multicolor emission in perovskite NCs is difficult to realize in current *** this work,we introduced lanthanide ions into lead-free Cs_(3)Sb_(2)Cl_(9) perovskite *** from the energy transfer between Cs_(3)Sb_(2)Cl_(9) perovskite NC host and lanthanide ions,the multicolor emission was *** on controlling the doping concentration of Tb^(3+)and Eu^(3+)ions,the white light emission under UV excitation would be turned easily in the Tb^(3+)/Eu^(3+)codoped *** addition,efficient energy transfer from perovskite NCs to Tb^(3+)or Eu^(3+)ions is beneficial to improving the optical properties of lead-free perovskite NCs,resulting in maximum PLQYs of red,green and white light emission of 22.6%,19.7%and 28.5%,***,a white light emitting device(WLED)was fabricated with a power efficiency of 18.5 lm/W,which presents the Commission Internationale de l'Eclairage(CIE)of(0.33,0.35).

关键词： Perovskite nanocrystals Lead free Lanthanide ions Energy transfer White light emitting device Rare earths

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Effect of Fluorocarbon Side Chain on the Microphase Morphology and Rheological Behavior of Thermoplastic Polyurethanes

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Chinese Journal of Polymer science 2023年第6期41卷 933-941,I0009页

作者： Ao Wang Shu-Ren Shao He-Cheng Wu Chen-Xu Tian Feng Luo Jie-Hua Li Zhen Li Hong Tan College of Polymer Science and Engineering State Key Laboratory of Polymer Materials EngineeringSichuan UniversityChengdu 610065China

Fluorinated diols(FDO)with dangling chain were introduced into polyether urethanes(PEUs)as chain extender in order to achieve internal *** on temperature dependent Fourier transform infrared(FTIR)spectroscopy results,the fluorinated polyether urethanes(FPEUs)exhibited weaker hydrogen bonding between C=O and N―H groups with addition of *** crystallinity of hard domain was destroyed determined by thermal *** with the results of dynamic mechanical analysis(DMA)and dissipative particle dynamics(DPD)simulation,it was proved that more loosely aggregated hard domains with weakened interaction separated from soft segment were *** analysis indicated that FDO reduced the complex viscosity and viscous flow activation energy which endowed the polymer with more *** the loss of hydrogen bonds,there was no significant decline in mechanical property resulting from the decrease of hard segment dissolved in soft segment *** presence of fluorinated carbon side chain could function as internal plasticizer and contribute to the processability of polyurethane.

关键词： carbon bonds destroyed

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Mechanical Response and Superelastic Properties of Cu-11.85Al-3.2Mn-0.1Ti TPMS Structures Printed by Laser Powder Bed Fusion

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Chinese Journal of Mechanical engineering 2025年第1期38卷 17-30页

作者： Mingzhu Dang Honghao Xiang Jingjing Li Chunsheng Ye Chao Cai Qingsong Wei State Key Laboratory of Material Processing and Die&Mould Technology School of Materials Science and EngineeringHuazhong University of Science and TechnologyWuhan 430074HubeiChina

Triply periodic minimal surfaces(TPMS)are structures with smooth surfaces and excellent energy absorption *** new functional materials,such as shape memory alloys,with TPMS structures provides a novel and promising research *** this study,three TPMS structures(Gyroid,Diamond,and Primitive)of Cu-11.85Al-3.2Mn-0.1Ti alloy were printed by laser powder bed fusion,which is favorable for the fabrication of complex *** manufacturing fidelity,mechanical response,and superelastic properties of the three structures were *** distributions in the three structures during compression were analyzed by finite element(FE)*** three structures were equipped with high-quality,glossy surfaces and uniform ***,due to powder adhesion and forming steps,there were volumetric errors and dimensional deviations between the samples and the CAD *** errors were within 1.6%for the Gyroid and Diamond *** dimensional deviations at the nodes in the three structures were less than 0.09 *** microstructures of all structures wereβ1´martensite,consistent with the cubic *** results of compression showed that the structures underwent a layer-by-layer compression failure mode,and the Primitive structures exhibited a more pronounced oscillatory *** Diamond structures showed the highest first fracture stress and strain of 164.67 MPa and 13.89%,*** also possessed the lowest yield strength(61.97 MPa)and the best energy absorption properties(7.6 MJ/m3).Through the deformation analysis,the Gyroid and Diamond structures were found to fracture at a 45°direction,while the Primitive structures fractured *** findings were consistent with the results obtained from the FE simulation,which showed equivalent stress *** applying various pre-strains,the Diamond structures displayed the highest superelastic strain of up to 3.53%.The superelastic recovery of all samples r

关键词： Laser powder bed fusion Shape memory alloy Triply periodic minimal surfaces Mechanical response Energy absorption

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Superior triethylamine-sensing properties based on SnO2 hollow nanospheres synthesized via one-step process

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Progress in Natural science:Materials International 2024年第4期34卷 682-689页

作者： Mingyue Xu Shu Yan Zia Ur Rehman Jianhua Hou Liangyun Zhai Shengjie Zhu Chuanbao Cao Wanfeng Xie Junyu Zhong Jun Yang State Key Laboratory of Bio-fibers and Eco-textiles School of Electronics and Information College of Materials Science and Engineering College of Chemistry and Chemical Engineering Qingdao University College of Environmental Science and Engineering Yangzhou University State Key Laboratory of Chemical Safety SINOPEC Research Institute of Safety Engineering Co. Ltd. National Registration Center for Chemicals Ministry of Emergency Management Research Center of Materials Science Beijing Institute of Technology State Key Laboratory of Multiphase Complex Systems Institute of Process Engineering Chinese Academy of Sciences

Due to serious harm of triethylamine（TEA） to environmental safety and human health, it is significant to synthesize gas-sensitive materials with high performance for TEA detection. However, it is still a challenge to achieve high-sensitivity detection of TEA at low temperature for a sensor synthesized through an economical and efficient method. In this work, hollow-structured SnO2（HS-SnO2） nanospheres have been fabricated by a facile, low-cost hydrothermal method in one step, which exhibit superior TEA-sensing properties, including not only ultrahigh response（127.75） for 100 ppm TEA, good selectivity, but also fast response and recovery time（17/28 s）, low detection threshold（1 ppm） and robust stability at a relatively low optimum operational temperature of 225°*** excellent gas-sensitizing performances are ascribed to porous hollow structures with rich oxygen vacancies that provide abundant active sites for raising O2adsorption and reaction of TEA and oxygen species. This work offers an effective and economical strategy for fabricating high-performance TEA sensors for industrial applications.

关键词： Hollow-structured SnO2 nanospheres TEA High response Gas sensors

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Sp/sp^(2)carbon ratio-driven high-throughput screening of electrocatalytic nitrogen reduction performance on transition metal single-atom catalysts

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Rare Metals 2024年第11期43卷 5781-5791页

作者： Ze-Xiang Yin Yu-Dan Li Yu-Huan Ye Yuan Liu Mian-Feng Li Zi-Jun Yang Xue-Rong Zheng Hao-Zhi Wang Yang Wang Yi-Da Deng State Key Laboratory of Marine Resource Utilization in South China Sea School of Materials Science and EngineeringHainan UniversityHaikou 570100China School of Materials Science and Engineering Tianjin Key Laboratory of Composite and Functional MaterialsKey Laboratory of Advanced Ceramics and Machining Technology(Ministry of Education)Tianjin UniversityTianjin 300072China

Single-atom catalysts(SACs)have been widely utilized in electrochemical nitrogen reduction reactions(NRR)due to their high atomic utilization and *** to the unique sp/sp^(2)co-hybridization,graphyne materials can offer stable adsorption sites for single metal *** investigate the influence of the sp/sp^(2)hybrid carbon ratio on the electrocatalytic NRR performance of graphyne,a high-throughput screening of 81 catalysts,with27 transition metals loaded on graphyne(GY1),graphdiyne(GY2),and graphtriyne(GY3),was conducted using firstprinciples *** results of the screening revealed that Ti@GY3 exhibits the lowest energy barrier for the rate-determining step(0.32 eV)in ***,to explore the impact of different sp/sp^(2)-hybridized carbon ratios on the catalytic activity of SACs,the mechanism of nitrogen(N_(2))adsorption,activation,and the comprehensive pathway of NRR on Ti@GY1,Ti@GY2,and Ti@GY3 was systematically *** was found that the ratio of sp/sp^(2)-hybridized carbon can significantly modulate the d-band center of the metal,thus affecting the energy barrier of the rate-determining step in NRR,decreasing from Ti@GY1(0.59 eV)to Ti@GY2(0.49 eV);and further to Ti@GY3(0.32 eV).Additionally,the Hall conductance was found to increase with the bias voltage in the range of 0.4-1 V,as calculated by Nanodcal software,demonstrating an improvement in the conductivity of the *** summary,this work provides theoretical guidance for modulating the electrocatalytic nitrogen reduction activity of SACs by varying the ratio of sp/sp^(2)hybrid carbon,with Ti@GY3 showing potential as an excellent NRR catalyst.

关键词： Nitrogen reduction reactions Single-atom catalysts Graphyne Ratio of sp/sp^(2)hybrid carbon High-throughput screening

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Unraveling the Heterogeneity of Epoxy-amine Networks by Introducing Dynamic Covalent Bonds

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Chinese Journal of Polymer science 2023年第6期41卷 926-932,I0009页

作者： Hu Xu Yao Zhang Hao Wang Jin-Rong Wu State Key Laboratory of Polymer Materials Engineering College of Polymer Science and EngineeringSichuan UniversityChengdu 610065China

Epoxy resins are a kind of universal thermosetting plastics,which are widely used as structural materials in various ***,it is necessary to understand the network structure of epoxy ***,it is challenging to reveal the network heterogeneity of epoxy resins due to the permanent covalent ***,we provide a novel strategy to characterize the network heterogeneity of epoxy resins by using the dynamic covalent bonds to replace the conventional covalent *** dynamic covalent bonds can reorganize under heat stimulus and the network keeps a constant crosslinking density during topological rearrangement,making it convenience to study the heterogeneity of epoxy ***-Williams-Watts(KWW)stretched exponential function is used to fit the stress relaxation data,and the parametersβandσperm/σ0 extracted from KWW equation indicate the network becomes more homogenous with the stoichiometric ratio of epoxy groups and amines decreases from 1/1 to 1/*** method proves that the side reaction between epoxy and hydroxyl is the main origin of the structural heterogeneity in epoxy resins compared to the secondary amines network.

关键词： resins bonds amines

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