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Tailored large-particle quantum dots with high color purity and excellent electroluminescent efficiency

Science Bulletin 2025年第6期70卷 905-913页

作者： Bo-Chen Liu Qizhong Lin Shuang-Qiao Sun Qi Sun Xing Peng Xinyuan Chen Yang Li Yue-Min Xie Shuit-Tong Lee Man-Keung Fung Jiangsu Key Laboratory for Carbon-Based Functional Materials&Devices Institute of Functional Nano&Soft Materials(FUNSOM)Soochow UniversitySuzhou 215123China Macao Institute of Materials Science and Engineering(MIMSE) MUST-SUDA Joint Research Center for Advanced Functional MaterialsZhuhai MUST Science and Technology Research InstituteMacao University of Science and TechnologyMacao 999078China Jiangsu Key Laboratory of Advanced Negative Carbon Technologies Soochow UniversitySuzhou 215123China Institute of Organic Optoelectronics(IOO) Jiangsu Industrial Technology Research Institute(JITRI)Suzhou 215200China Fujian Science&Technology Innovation Laboratory for Optoelectronic Information of China Fuzhou 350108China Poly Optoelectronics Tech.Ltd. Jiangmen 529020China

High-quality quantum dots(QDs)possess superior electroluminescent efficiencies and ultra-narrow emission linewidths are essential for realizing ultra-high definition QD light-emitting diodes(QLEDs).However,the synthesis of such QDs remains *** this study,we present a facile high-temperature successive ion layer adsorption and reaction(HT-SILAR)strategy for the growth of precisely tailored Zn_(1-x)Cd_(x)Se/ZnSe shells,and the consequent production of high-quality,large-particle,alloyed red CdZnSe/Zn_(1-x)Cd_(x)Se/ZnSe/ZnS/CdZnS *** transitional Zn1 xCdxSe/ZnSe shells serve to effectively suppress heavy hole energy level splitting and weaken the exciton-longitudinal optical phonon coupling of QDs,thus facilitating the formation of highly luminescent QDs with a near-unity photoluminescence quantum yield of 97.8%and narrow emission with a full width at half maximum of 17.1 *** addition,the introduction of transitional shells can extend the particle size of QDs to 19.0 nm,which is beneficial for efficient carrier recombination and reduced Joule heating in QD-based *** a result,the fabricated QLEDs can achieve a record external quantum efficiency of 38.2%,luminance over 120,000 cd m^(-2),and exceptional operational stability T95(tested at 1,000 cd m^(-2))of 24,100 *** findings provide new ave-nues for synthesizing high-quality QDs with high color purity.

关键词： Quantum dots Light-emitting diodes High color purity High efficiency Large particles

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Design of deployable bridge using multistable miura-ori structure for emergency rescue

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Automation in Construction 2025年 176卷

作者： Wang, Wei Li, Xu Yan, Peng Huang, Hailin Li, Bing School of Robotics and Advanced Manufacture Harbin Institute of Technology Shenzhen518052 China Guangdong Key Laboratory of Intelligent Morphing Mechanisms and Adaptive Robotics Shenzhen518052 China State Key Laboratory of Robotics and System Harbin Institute of Technology Harbin150001 China

Rapid deployment equipment is crucial in emergency rescue operations during natural disasters such as earthquakes and floods. However, traditional equipment often has limitations such as complex operations, long deployment times, and high manpower requirements. This paper designs a deployable bridge for post-disaster rescue, with its core component being a bistable Miura-ori unit. Bistable characteristics of the Miura-ori unit are shown. Then, finite element model (FEM) and prototype experiments are used to demonstrate the load-bearing capacity and bistable characteristics of the bistable Miura-ori unit. By arranging the bistable Miura-ori units, a deployable bridge with multistable characteristics is achieved, enabling rapid deployment with a single drive. The load-bearing and impact resistance capabilities of the bridge are also tested. This design significantly simplifies system complexity, reduces labor requirements, and ensures high load-bearing capacity and impact resistance, providing a new solution for emergency rescue. © 2025 Elsevier B.V.

关键词： Emergency services

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Direct blood flow velocity measurements of zebrafish cerebral vessels with a dual-mode light-sheet microscope

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Biomedical Optics Express 2025年第7期16卷 2573-2583页

作者： Yifan Zhang Chong Chen Yao Tan Yanjie Lu Xuefei Chen Guang Yang Hui Li School of Biomedical Engineering (Suzhou) University of Science and Technology of China Suzhou 215163 Jiangsu China Jiangsu Key Laboratory of Medical Optics Suzhou Institute of Biomedical Engineering and Technology Chinese Academy of Sciences Suzhou 215163 Jiangsu China Laboratory of Advanced Theranostic Materials and Technology Ningbo Institute of Materials Technology and Engineering Chinese Academy of Sciences Ningbo 315201 China

Characterization of cerebral blood flow is critical to studying brain function and disorders. We report a method for directly measuring zebrafish cerebral blood flow velocity in 3D. A dual-mode light sheet microscopy combined with structured illumination was developed to image zebrafish 3D brain vasculature in structured illumination mode and to trace the blood cells in fast imaging mode at the same region. Evans blue (EB) was injected into the heart of zebrafish to visualize the vessels, while the blood cells appeared to be dark in the vessels. Our approach significantly improves imaging speed to 100 Hz. Algorithms were developed to trace the blood cells and match the flow velocity to vascular structures. The blood flow velocity in the cerebral microvessels at different depths was obtained for zebrafish up to 8 days post-fertilization (dpf). The flow velocity and flux in “Y” shaped and curved vessels were analyzed.

关键词： Fluorescence microscopy Fluorescence spectroscopy Imaging systems Light sheet microscopy Multiphoton microscopy Structured illumination microscopy

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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

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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Intrinsic Pre-Strain Effect in Ti-Ni Based Shape Memory Alloys

SSRN

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SSRN 2025年

作者： Ren, Jinglin Chen, Yulin Gu, Jiawei Zhang, Peng Chen, Chen Zhang, Jian Jiangsu Key Laboratory of Advanced Food Manufacturing Equipment and Technology School of Intelligent Manufacturing Jiangnan University Wuxi214122 China

Shape memory effect (SME) in shape memory alloys (SMAs) results from deformation below Af, accompanying pre-strain effect (PSE) which was usually implicated by dislocations. We systematically investigate the effects o... 详细信息

关键词： Titanium alloys

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Novel Cellulosic Fiber Composites with Integrated Multi-Band Electromagnetic Interference Shielding and Energy Storage Functionalities

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Nano-Micro Letters 2025年第5期17卷 508-524页

作者： Xuewen Han Cheng Hao Yukang Peng Han Yu Tao Zhang Haonan Zhang Kaiwen Chen Heyu Chen Zhenxing Wang Ning Yan Junwen Pu Beijing Key Laboratory of Lignocellulosic Chemistry College of Materials Science and TechnologyBeijing Forestry UniversityBeijing 100083People’s Republic of China Department of Chemical Engineering and Applied Chemistry University of TorontoTorontoON M5S3E5Canada Key Laboratory of Advanced Marine Materials Ningbo Institute of Materials Technology and EngineeringChinese Academy of SciencesNingbo 315201People’s Republic of China College of Mechanical and Electronic Engineering Northwest A&F UniversityYangling 712100ShaanxiPeople’s Republic of China Jiangsu Provincial Key Lab of Sustainable Pulp and Paper Technology and Biomass Materials Nanjing Forestry UniversityNanjing 210037People’s Republic of China Co-Innovation Center of Efficient Processing and Utilization of Forest Resources Nanjing Forestry UniversityNanjing 210037People’s Republic of China

In an era where technological advancement and sustainability converge,developing renewable materials with multifunctional integration is increasingly in *** study filled a crucial gap by integrating energy storage,multi-band electromagnetic interference(EMI)shielding,and structural design into bio-based ***,conductive polymer layers were formed within the 2,2,6,6-tetramethylpiperidine-1-oxide(TEMPO)-oxidized cellulose fiber skeleton,where a mild TEMPO-mediated oxidation system was applied to endow it with abundant macropores that could be utilized as active sites(specific surface area of 105.6 m2 g-1).Benefiting from the special hierarchical porous structure of the material,the constructed cellulose fiber-derived composites can realize high areal-specific capacitance of 12.44 F cm^(-2)at 5 m A cm^(-2)and areal energy density of 3.99 m Wh cm^(-2)(2005 m W cm^(-2))with an excellent stability of maintaining 90.23%after 10,000 cycles at 50 m A cm^(-2).Meanwhile,the composites showed a high electrical conductivity of 877.19 S m-1 and excellent EMI efficiency(>99.99%)in multiple wavelength *** composite material’s EMI values exceed 100 d B across the L,S,C,and X bands,effectively shielding electromagnetic waves in daily *** proposed strategy paves the way for utilizing bio-based materials in applications like energy storage and EMI shielding,contributing to a more sustainable future.

关键词： Cellulose fiber skeleton TEMPO mediated oxidation In-situ polymerization Multi-band EMI shielding Energy storage

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Symmetric high-performance transport in n- and p-type HfSnS3 nanowire gate-all-around transistors toward sub-5-nm electronics

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Physical Review Applied 2025年第4期23卷 044002-044002页

作者： Chuyao Chen Jialin Yang Hengze Qu Wenhan Zhou Tingting Guo Weicong Sun Xiufeng Song MIIT Key Laboratory of Advanced Display Materials & Devices Jiangsu Engineering Research Center for Quantum Dot Display College of Materials Science and Engineering Institute of Optoelectronics & Nanomaterials Nanjing University of Science and Technology Nanjing Jiangsu 210094 China

Gate-all-around (GAA) configurations with superior electrostatics and scaling potential are recognized as an ultimate solution for the post-Moore complementary metal oxide semiconductor (CMOS) circuits. In this case, nanowires (NWs) with a natural dangling-bond-free surface are one of the most promising channel candidates for the ultrascaled GAA field-effect transistors (FETs). Herein, we propose that the HfSnS3 NWs are very attractive channel materials for sub-5-nm GAA FETs, exhibiting excellent n- and p-type symmetric behaviors. In particular, holding ultrahigh phonon-limited carrier mobilities, the sub-5-nm HfSnS3 NW n- and p-FETs far surpass the International technology Roadmap for Semiconductors high-performance requirements. The on-current can exceed 1000 µA μm−1 even for 3-nm nodes while maintaining an excellent n- and p-type performance ratio close to 1. Furthermore, we reveal that the superior subthreshold swing control capability of the HfSnS3 NW p-FETs is attributed to the px-orbital-induced heavy-hole effective mass. This advantage can be attractive, especially for the further scaling of CMOS technology. Meanwhile, the power and delay of the HfSnS3 NW FETs are assessed to ensure their fast-switching and energy-efficient behaviors. Our results suggest that HfSnS3 NW FETs with superior and symmetric transport performance possess promising prospects for future sub-5-nm GAA complementary transistors.

关键词： III-V semiconductors

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Target Defense with Multiple Defenders and an Agile Attacker via Residual Policy Learning

arXiv

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arXiv 2025年

作者： Tao, Jiyue Shen, Tongsheng Zhao, Dexin Zhang, Feitian Robotics and Control Laboratory Department of Advanced Manufacturing and Robotics College of Engineering and the State Key Laboratory of Turbulence and Complex Systems Peking University Beijing100871 China National Innovation Institute of Defense Technology Beijing100071 China

The target defense problem involves intercepting an attacker before it reaches a designated target region using one or more defenders. This letter focuses on a particularly challenging scenario in which the attacker is more agile than the defenders, significantly increasing the difficulty of effective interception. To address this challenge, we propose a novel residual policy framework that integrates deep reinforcement learning (DRL) with the force-based Boids model. In this framework, the Boids model serves as a baseline policy, while DRL learns a residual policy to refine and optimize the defenders’ actions. Simulation experiments demonstrate that the proposed method consistently outperforms traditional interception policies, whether learned via vanilla DRL or fine-tuned from force-based methods. Moreover, the learned policy exhibits strong scalability and adaptability, effectively handling scenarios with varying numbers of defenders and attackers with different agility levels. Copyright © 2025, The Authors. All rights reserved.

关键词： Adversarial machine learning

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Advances in human organs-on-chips and applications for drug screening and personalized medicine

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Fundamental Research 2025年第3期5卷 1258-1272页

作者： Zhou, Chenyang Li, Zhangjie Lu, Kangyi Liu, Yijun Xuan, Lian Mao, Hongju Wang, Xiaolin Department of Micro/Nano Electronics School of Electronic Information and Electrical Engineering Shanghai Jiao Tong University Shanghai 200240 China Institute of Medical Robotics Shanghai Jiao Tong University Shanghai 200240 China State Key Laboratory of Transducer Technology Shanghai Institute of Microsystem and Information Technology Chinese Academy of Sciences Shanghai 200050 China National Key Laboratory of Advanced Micro and Nano Manufacture Technology Shanghai Jiao Tong University Shanghai 200240 China National Center for Translational Medicine (Shanghai) SHU Branch Shanghai University Shanghai 200444 China

The limitations of conventional animal tests and two-dimensional cell culture hinder their advancement in fundamental research and clinical/translational applications. As an emerging alternative technology, organ-on-a-chip serves as a platform that faithfully simulates the key phenotypical, physiological, and functional features of human tissues/organs through the accurate regulation of the parameters such as physical and biochemical microenvironment, as well as cellular patterns. In this review, we mainly introduce the recent progress in the organ-on-a-chip field, including lung, gut, heart, liver, vasculature and multiorgan studies. Furthermore, we highlight the potential applications in drug screening and personalized medicine. Finally, we conclude by addressing the current challenges and future perspective in the technology and commercialization of organ-on-chips. We anticipate that the development of organ-on-a-chip technology will revolutionize the studies on biology and medicine by providing new understanding of mechanisms of diseases and insights into clinical therapeutics. © 2024

关键词： Drug screening Microfluidics Organ-on-a-chip Personalized medicine

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Lunar regolith simulant-derived 3D-printed geopolymers with optimized mechanical and thermal management properties

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Composites Part A: Applied Science and Manufacturing 2025年 196卷

作者： Sun, Yifan Ma, Siqi Chen, Qingze Chen, Guoliang He, Peigang Wang, Yaming Qiu, Jun Jia, Dechang School of Energy Science and Engineering Key Laboratory of Aerospace Thermophysics Harbin Institute of Technology Harbin150001 China State Key Laboratory of Robotics and System Harbin Institute of Technology Harbin150001 China Institute for Advanced Ceramics Key Laboratory of Advanced Structure-Function Integrated Materials and Green Manufacturing Technology Harbin Institute of Technology Harbin150080 China Guangdong Provincial Key Laboratory of Mineral Physics and Materials Guangzhou Institute of Geochemistry Chinese Academy of Sciences Guangzhou510460 China

Lunar soil, as an in-situ resource, holds significant potential for constructing bases and habitats on the Moon. However, such constructions face challenges including limited mechanical strength and extreme temperature fluctuations ranging from −170 °C to +133 °C between lunar day and night. In this study, we developed a 3D-printed geopolymer derived from lunar regolith simulant with an optimized zig-zag structure, exhibiting exceptional mechanical performance and thermal stability. The designed structure achieved remarkable damage tolerance, with a compressive strength exceeding 12.6 MPa at ∼ 80 vol% porosity and a fracture strain of 3.8 %. Finite element method (FEM) simulations revealed that the triangular frame and wavy interlayers enhanced both stiffness and toughness. Additionally, by incorporating strategically placed holes and extending the thermal diffusion path, we significantly improved the thermal insulation of the structure, achieving an ultralow thermal conductivity of 0.24 W/(m K). Furthermore, an iron-free geopolymer coating reduced overheating under sunlight by 51.5 °C, underscoring the material's potential for space applications. © 2025 Elsevier Ltd

关键词： Compressive strength

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