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Understanding excitonic behavior and electroluminescence light emitting diode application of carbon dots

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Chinese Chemical Letters 2025年第2期36卷 201-206页

作者： Yuan Liu Boyang Wang Yaxin Li Weidong Li Siyu lu School of Chemistry and Chemical Engineering Henan University of Technology College of Chemistry Zhengzhou University College of Material Engineering Henan International Joint Laboratory of Rare Earth Composite MaterialsHenan University of Engineering

Carbon dots (CDs),due to their low cost,high stability,and high luminous efficiency,have emerged as an excellent material for the emissive layer in next-generation electroluminescent light-emitting diodes(ELEDs).However,improving the efficiency of fluorescent CDs-based ELEDs remains challenging,primarily because it is difficult to utilize triplet excitons in the electroluminescence ***,enhancing the exciton utilization efficiency of CDs during electroluminescence is *** on this,we exploited the characteristic large exciton binding energy commonly found in CDs to develop exciton-emitting *** CDs facilitate the radiative recombination of excitons during electroluminescence,thereby improving the electroluminescent *** rationally selecting precursors,we developed high quantum efficiency CDs and subsequently constructed CDs-based *** blue-light device exhibited an external quantum efficiency of over 4%.This study introduces a novel design concept for CDs,providing a new strategy for developing high-performance blue ELEDs based on CDs.

关键词： Carbon dots Controllable preparation Electroluminescence Exciton emission Light-emitting diodes

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论新质生产方式

当代经济研究 2025年第1期 66-74,F0003页

作者：鲁保林谢辉福建师范大学经济学院福州350117

生产方式既是保存和发展生产力的具体形式和方式方法,也是生产关系的基本载体,表现一定的社会生产关系的特殊性质。马克思考察了资本主义生产方式从协作到工场手工业分工再到机器大工业的转变过程,表明生产方式的突破性变革是发展先进... 详细信息

生产方式既是保存和发展生产力的具体形式和方式方法,也是生产关系的基本载体,表现一定的社会生产关系的特殊性质。马克思考察了资本主义生产方式从协作到工场手工业分工再到机器大工业的转变过程,表明生产方式的突破性变革是发展先进生产力的基础。培育和发展新质生产力,必须重塑生产方式的基本形态。作为后发国家,中国只有在坚持社会主义基本经济制度的前提下,发展出具有原创性的高质量物质生产方式,才能实现真正意义上的赶超。

关键词：新质生产力生产方式资本主义生产方式高质量物质生产方式

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High quantum yield yellow emission carbon dots for the construction of blue light blocking films

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Chinese Chemical Letters 2025年第2期36卷 244-249页

作者： Liwen Wang Boyang Wang Siyu lu Shubo Lv Xiaoli Qu Neonatal Disease Screening Unit The Third Affiliated Hospital of Zhengzhou University College of Chemistry Pingyuan Laboratory Zhengzhou University Erythrocyte Biology Laboratory School of Life Sciences Zhengzhou University

White light illumination is essential in daily life, however, the substantial amount of blue light it contains can damage human eyes. Therefore, it is important to block this high-energy blue light to protect visual health. In this study, yellow-emitting carbon dots(CDs) with a quantum yield exceeding 94% were synthesized using citric acid and urea. These CDs effectively absorb blue light. By incorporating them into polystyrene, multiple films termed CDs-based blue light blocking films(CBFs) were developed, each offering different levels of blue light absorption. These CBFs exhibited excellent transparency and efficient blue light filtering capabilities. This study highlights the potential of high quantum yield CDs, which specifically absorb blue light, as foundational materials for developing light-blocking solutions against highenergy short-wavelength light.

关键词： Blue light blocking Carbon dots Composite film Controllable preparation High quantum yield

Interface compatibility between sulfide solid electrolytes and Ni-rich oxide cathode materials:Factors,modification,perspectives

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Journal of Energy Chemistry 2025年第2期101卷 233-262页

作者： Tianwen Yang Haijuan Pei Haijian Lv Shijie lu Qi Liu Daobin Mu Beijing Key Laboratory of Environmental Science and Engineering School of Materials Science an Engineering Beijing Institute of Technology State Key Laboratory of Space Power-Sources Technology Shanghai Institute of Space Power-Sources

All-solid-state batteries(ASSBs) assembled with sulfide solid electrolytes(SSEs) and nickel(Ni)-rich oxide cathode materials are expected to achieve high energy density and safety,representing potential candidates for the next-generation energy storage ***,interfacial issues between SSEs and Nirich oxide cathode materials,attributed to space charge layer,interfacial side reactions,and mechanical contact failure,significantly restrict the performances of *** interface degradation is closely related to the components of the composite cathode and the process of electrode *** on the influencing factors of interface compatibility between SSEs and Ni-rich oxide cathode,this article systematically discusses how cathode active materials(CAMs),electrolytes,conductive additives,binders,and electrode fabrication impact the interface *** addition,the strategies for the compatibility modification are ***,the challenges and prospects of intensive research on the degradation and modification of the SSE/Ni-rich cathode material interface are *** review is intended to inspire the development of high-energy-density and high-safety all-solid-state batteries.

关键词： All–solid–state batteries Influencing factors Interface compatibility Ni–rich oxide cathode Sulfide solid electrolyte

Status analysis on sputtering and erosion evaluation methods of ion optic systems

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Chinese Journal of Aeronautics 2025年第1期38卷 254-270页

作者： Long MIAO Tongxun YANG Zhengxi ZHU Chang lu Zhiwen WU Ningfei WANG School of Aerospace Engineering Beijing Institute of TechnologyBeijing 100081China Chongqing Innovation Center Beijing Institute of TechnologyChongqing 404100China Advanced Aerospace Power and Energy Research Center Beijing Institute of TechnologyZhuhai 519088China

In the past few decades,ion engines have been widely used in deep-space propulsion and satellite *** aim of extending the thruster lifetime is still one of the most important parts during the design stage of ion *** one of the core components of ion engine,the grid assembly of ion optic systems may experience long-term ion sputtering in extreme electro-thermal environments,which will eventually lead to its structural and electron-backstreaming *** this paper,the current studies of the grid assembly erosion process are systematically analyzed from the aspects of sputtering damage process of grid materials,numerical simulations,and measurements of erosion characteristics of grid *** advantages and disadvantages of various erosion prediction models are highlighted,and the key factors and processes affecting the prediction accuracy of grid assembly erosion patterns are *** different types of experimental methods of grid assembly erosion patterns are *** analysis in this paper is of great importance for selecting the sputter-resistant grid materials,as well as establishing the erosion models and measurement methods to accurately determine the erosion rate and failure modes of grid ***,the working conditions and structure parameters of ion optic systems could be optimized based on erosion models to promote the ion engine lifetime.

关键词： Electric propulsion Ion optic systems Sputtering yield Erosion characteristics Erosion pattern measurement Lifetime evaluation

基于泊松噪声和优化极限学习机的多因素混合学习方法及应用

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统计与决策 2025年第1期41卷 52-57页

作者：蒋锋路畅王辉中南财经政法大学统计与数学学院武汉430073 中国科学院武汉文献情报中心武汉430071 中国科学院科技大数据湖北省重点实验室武汉430071

针对风电功率数据高波动性和间歇性的特点,文章提出了一种基于泊松噪声的互补集合经验模态分解(CEEMDPN)和改进的蛇优化算法(MSO)优化极限学习机的多因素混合学习方法。首先,利用CEEMDPN将风电功率序列分解为子序列;然后,引入曲线自适... 详细信息

针对风电功率数据高波动性和间歇性的特点,文章提出了一种基于泊松噪声的互补集合经验模态分解(CEEMDPN)和改进的蛇优化算法(MSO)优化极限学习机的多因素混合学习方法。首先,利用CEEMDPN将风电功率序列分解为子序列;然后,引入曲线自适应调整参数改进蛇优化算法;最后,运用MSO优化的极限学习机(ELM)对每个子序列进行预测并集成。为了验证CEEMDPN-MSO-ELM模型的有效性,采用龙源电力集团的风电功率数据进行超短期预测,实证结果表明,CEEMDPN算法能够加强风电功率序列的主频率部分并提高分解精度,MSO算法能够很好地平衡算法的寻优速度与收敛精度,从而有效提升ELM模型的预测性能,所提模型的预测精度和稳健性均优于其他对比模型。

关键词：超短期风电功率预测互补集合经验模态分解蛇优化算法极限学习机

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Nanocarrier-mediated siRNA delivery:a new approach for the treatment of traumatic brain injury-related Alzheimer's disease

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Neural Regeneration Research 2025年第9期20卷 2538-2555页

作者： Jie Jin Huajing Zhang Qianying lu Linqiang Tian Sanqiao Yao Feng Lai Yangfan Liang Chuanchuan Liu Yujia lu Sijia Tian Yanmei Zhao Wenjie Ren Institute of Disaster and Emergency Medicine Tianjin UniversityTianjinChina Key Laboratory for Disaster Medicine Technology TianjinChina Henan Medical Key Laboratory for Research of Trauma and Orthopedics The Third Affiliated Hospital of Xinxiang Medical UniversityXinxiangHenan ProvinceChina Clinical Medical Center of Tissue Engineering and Regeneration Xinxiang Medical UniversityXinxiangHenan ProvinceChina Institutes of Health Central Plain Xinxiang Medical UniversityXinxiangHenan ProvinceChina School of Public Health Xinxiang Medical UniversityXinxiangHenan ProvinceChina

Traumatic brain injury and Alzheimer's disease share pathological similarities,including neuronal loss,amyloid-βdeposition,tau hyperphosphorylation,blood-brain barrier dysfunction,neuroinflammation,and cognitive ***,traumatic brain injury can exacerbate Alzheimer's disease-like pathologies,potentially leading to the development of Alzheimer's *** offer a potential solution by facilitating the delive ry of small interfering RNAs across the blood-brain barrier for the targeted silencing of key pathological genes implicated in traumatic brain injury and Alzheimer's disease.U nlike traditional approaches to neuro regeneration,this is a molecula r-targeted strategy,thus avoiding non-specific drug *** review focuses on the use of nanocarrier systems for the efficient and precise delive ry of siRNAs,discussing the advantages,challenges,and future *** principle,siRNAs have the potential to target all genes and non-targetable protein s,holding significant promise for treating various *** the various therapeutic approaches currently available for neurological diseases,siRNA gene silencing can precisely"turn off"the expression of any gene at the genetic level,thus radically inhibiting disease progression;however,a significant challenge lies in delivering siRNAs across the blood-brain *** have received increasing attention as an innovative drug delive ry tool fo r the treatment of brain *** are considered a potential therapeutic strategy with the advantages of being able to cross the blood-brain barrier,targeted drug delivery,enhanced drug stability,and multifunctional *** use of nanoparticles to deliver specific modified siRNAs to the injured brain is gradually being recognized as a feasible and effective *** this strategy is still in the preclinical exploration stage,it is expected to achieve clinical translation in the future,creating a new field of molecular tar

关键词： blood-brain barrier cognitive dysfunction exosomes gene silencing immunotherapy inorganic nanomaterials liposome nanoparticles neuroinflammation polymer nanoparticles stem cells

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Dual-Mode Colorimetric and Fluorescent Detection of Tumor Cells Based on Gold Nanoparticles-Loaded Phosphine Covalent Organic Frameworks

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Journal of Analysis and Testing 2025年第01期 21-31页

作者： Bilian Li Min Zhou Chun Zhao Lin Xiao Tianle Qi Hanbin Xu Linjiang Guo Guobao Ning Xiaokang lu Keming Zhu hui Zhao Can-Peng Li School of Chemical Science and Technology Yunnan University Affiliated Hospital of Yunnan University School of Life Science Yunnan University Laboratory for Conservation and Utilization of Bioresource Yunnan University

Circulating tumor cells(CTCs) are important markers for cancer. The part of tumor cells that are detached from the primary tumor or metastatic tumor and enter the blood circulation is called CTCs. It is crucial to develop a rapid, accurate, and easy-to-implement diagnostic system for CTCs for early tumor diagnosis and for monitoring progression of the disease. In this work, we reported a colorimetric and fluorescent dual-mode assay for the detection of CTCs. Our assay used magnetic nanoparticles and aptamer for CTCs capture and gold nanoparticles-loaded covalent organic frameworks(Au@COFs) for signal amplification, respectively. The magnetic nanoparticles were modified with folic acid to capture CTCs by interaction between folic acid and the folate receptor overexpressed on the surface of tumor cells. The covalent organic frameworks were engineered to have both nitro-reductase-like and glucose–oxidase-like activities. The nitro-reductase-like activity converted the substrate p-nitrophenol to p-nitroaniline for colorimetric detection, and the glucose-oxidase-like activity enabled fluorescence detection. Specifically, Au@COFs catalyzed glucose oxidation and generated hydrogen peroxide to oxidize Fe 2+to Fe 3+, which converted MIL(Al)-MOF to MIL(Fe)-MOF through ion exchange, resulting in the fluorescence quenching of MIL(Al)-MOF. Our assay showed high sensitivity with a detection limit of 17 cells/mL using MCF-7 cells as model cancer cells. This work provided an e fficient and ultrasensitive strategy for CTCs detection and has potential applications in cancer identification and diagnosis. Dual-mode detection system, combining colorimetric and fluorescent signals, integration of magnetic nanoparticles and aptamers for CTC capture, and utilization of covalent organic frameworks loaded with gold nanoparticles for signal amplification can improve sensitivity and accuracy.

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Supply Chain Disruption and Import Strategy:Evidence from the Great East Japan Earthquake

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China & World Economy 2025年第1期33卷 132-161页

作者： Fan lu Zhicong Li Xinrong Cai School of Public Finance and Taxation Central University of Finance and EconomicsChina School of Finance and Taxation Zhongnan University of Economics and LawChina

Global supply chain networks foster collaboration but accelerate cross-border risk *** study investigates the effect of the 2011 East Japan earthquake on Chinese firms'import *** findings reveal that the disruption led to a shift toward supply chain concentration,with firms reducing the diversification of import *** was a slight increase in the number of countries from which firms sourced imports but import shares became more concentrated,reflecting a reliance on fewer,centralized *** affected by the earthquake prioritized long-term partnerships and sought suppliers in regions with lower natural disaster risks,aiming to mitigate supply chain vulnerabilities and reduce switching *** findings also show that state-owned enterprises,private firms,and research and development-intensive firms were more inclined to centralize their import *** suggests that these firms,leveraging their larger scale,substantial resources,and robust risk management strategies,favored a more concentrated sourcing approach in order to better control their supply chains and ensure stability in the face of global disruptions.

关键词： firm behavior import strategy natural disaster supply chain