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Nano Research 2023年第7期16卷 10476-10482页

作者： Xiaohan Li Aijun Liu Zhaoyu Wang youchao wei Qun Lin Yameng Chen Yongsheng Liu Maochun Hong College of Chemistry Fuzhou UniversityFuzhou 350116China State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou 350002China Fujian Science&Technology Innovation Laboratory for Optoelectronic Information of China Fuzhou 350108China School of Physical Science and Technology ShanghaiTech UniversityShanghai 201210China

Self-trapped excitons(STEs)emission from halide perovskites with strong exciton-phonon coupling has attracted considerable attention due to the widespread application in optoelectronic ***,the in-depth understanding of the relationship between exciton-phonon coupling and luminescence intensity remains ***,a doping-enhanced exciton-phonon coupling effect is observed in Cs_(3)Cu_(2)I_(5)nanocrystals(NCs),which leads to a remarkable increasement of their STEs emission *** study shows that the hetero-valent substitution of Cu+with alkaline-earth metal ions(AE^(2+))causes a greater degree of Jahn-Teller distortion between the ground state and excited state structures of[Cu_(2)I_(5)]_(3)-clusters as evidenced by our spectral analysis and first-principles *** a consequence,an X-ray detector based on these Cs_(3)Cu_(2)I_(5):AE NCs delivers an X-ray imaging resolution of up to 10 lp·mm^(-1) and a low detection limit of 0.37μGyair·s^(-1),disclosing the potential of doping-enhanced exciton-phonon coupling effect in improving STEs-emission and practical application for X-ray imaging.

关键词： Cs_(3)Cu_(2)I_(5) nanocrystals self-trapped exciton exciton-phonon coupling X-ray image

Achieving Intrinsic Dual-Band Excitonic Luminescence from a Single Three-Dimensional Perovskite Nanoparticle Through Ni^(2+)-Mediated Halide Anion Exchange

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CCS Chemistry 2024年第2期6卷 415-426页

作者： Licheng Yu youchao wei Yuanchao Lei Caiping Liu Yongsheng Liu Maochun Hong State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhouFujian 350002 Fujian Science&Technology Innovation Laboratory for Optoelectronic Information of China FuzhouFujian 350108 School of Physical Science and Technology ShanghaiTech UniversityShanghai 201210

Rapid halide anion exchange easily occurring in metal-halide perovskite nanoparticles(NPs)makes it nearly impossible to create a single three-dimensional(3D)CsPbX_(3)(X=Cl,Br,I)NP that simultaneously comprises two separate perovskite *** circumvent this problem,we first propose a Ni^(2+)-mediated halide anion-exchange strategy in zero-dimensional(0D)Ni^(2+)-doped Cs_(4)PbBr_(6)(Cs_(4)PbBr_(6):Ni)perovskites to achieve ultra-stable 3D CsPbX_(3)NPs with two coexisting different perovskite individuals of CsPbCl_(3)and/or CsPbBr_(3).By combining the experimental results with first-principles calculations,we confirm that the completely isolated[PbBr_(6)]4−octahedra in 0D Cs_(4)PbBr_(6):Ni NPs can restrict rapid halide anion exchange and the anion diffusion preferentially proceeds in the proximity of substitutional NiPb centers,namely[NiBr_(6)]4−octahedra in a meta-stable state,rather than in the 0D Cs_(4)PbBr_(6)and residual 3D CsPbBr_(3)regions,thereby delivering intrinsic dual-band excitonic luminescence from a single 3D CsPbX_(3)NP with a more stable and efficient CsPbCl_(3)component as compared to its counterparts synthesized using conventional *** new insights regarding the precise control of halide anion exchange enable the preparation of a new type of high-efficiency perovskite materials with suppressed anion interdiffusion for prospective optoelectronic devices.

关键词： excitonic luminescence three-dimensional CsPbX_(3) perovskite nanoparticle halide anion exchange impurity doping

Breaking the concentration quenching limit of lanthanide emitter through multi-coupling of confined quasi-0D & 2D energy migration

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Science China Chemistry 2024年

作者： Yuanchao Lei Shanshan Zhou Jianxi Ke Licheng Yu youchao wei Yongsheng Liu Maochun Hong State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences School of Physical Science and Technology Shanghai Tech University Fujian Science & Technology Innovation Laboratory for Optoelectronic Information of China

The widespread applications of lanthanide-doped materials have fuelled a growing demand for precise control over the luminescence characteristics of these materials. However, the limitation imposed by concentration quenching remains a major obstacle in achieving efficient luminescence from lanthanide-doped materials. Herein, a novel strategy utilizing Sc2O3:Ln3+microflowers to enable confined energy migration in both microscopic quasi-zero-dimensional（0D） and mesoscopic twodimensional（2D） multi-coupling systems is proposed to overcome the concentration quenching limit of lanthanide emitters and achieve a remarkable doping amount of 48.14% on a single particle without resorting to complex core/multishell *** studies reveal that the multi-confinement structure effectively restricts the range of energy migration and significantly reduces excitation energy migration to defects. Based on these highly doped Sc2O3microflowers, full spectrum and power-dependent tunable multi-color lanthanide emission in a single particle is successfully achieved. Furthermore, the 2Dencoded patterns derived from these microflowers hold great promise for anti-counterfeiting applications. Our findings emphasize the multi-coupling of confined quasi-0D & 2D energy migration within a well-designed structure, providing valuable insights into concentration quenching mechanisms. This also opens up new opportunities for multi-level anti-counterfeiting systems and information security.

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某高强钢轻量化副车架的动刚度优化

时代汽车 2021年第17期 151-154页

作者：韦友超周思伍马志上汽通用五菱汽车股份有限公司广西柳州市545007 柳州孔辉汽车科技有限公司广西柳州市545007

由于前副车架通过发动机后悬置与发动机相连,为了避免结构共振和降低轰鸣声,提升NVH性能,必须进行副车架的动态响应分析,其中动刚度是极为重要的指标。本文以某公司SUV的前副车架为例,采用FB780高强钢减薄并结构优化得到第一轮轻量化模... 详细信息

由于前副车架通过发动机后悬置与发动机相连,为了避免结构共振和降低轰鸣声,提升NVH性能,必须进行副车架的动态响应分析,其中动刚度是极为重要的指标。本文以某公司SUV的前副车架为例,采用FB780高强钢减薄并结构优化得到第一轮轻量化模型,运用有限元软件Optistruct对轻量化模型进行动刚度分析,并通过调整子级零件板材的厚度分析其对动刚度的敏感性,同时结合重量敏感性得出不同板材厚度的最优组合。最终得到最优的轻量化方案,比原量产副车架减重3.8KG,减重20%,而动刚度性能指标并不降低。为乘用车前副车架的设计和优化提供了动刚度分析依据。

关键词：副车架动刚度轻量化敏感性 Optistruct

基于ABAQUS软件的乘用车前副车架模态分析

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汽车实用技术 2021年第15期46卷 113-116页

作者：韦友超周磊周思潘嵩上汽通用五菱汽车股份有限公司广西柳州545007 柳州孔辉汽车科技有限公司广西柳州545007

由于前副车架通过发动机后悬置与发动机相连,在设计时不仅要考虑到其强度,同时为了避免振动放大和噪声,提升NVH性能,必须将模态特征作为对前副车架设计的必要约束条件,避开发动机在各转速下的激振频率(中频:25 Hz~400 Hz),也要避开路面... 详细信息

由于前副车架通过发动机后悬置与发动机相连,在设计时不仅要考虑到其强度,同时为了避免振动放大和噪声,提升NVH性能,必须将模态特征作为对前副车架设计的必要约束条件,避开发动机在各转速下的激振频率(中频:25 Hz~400 Hz),也要避开路面的激励频率(低频:25 Hz以下)。文章以某公司某款全新MPV的前副车架为例,运用有限元软件ABAQUS对前副车架进行模态分析,并结合试验数据验证CAE模型的准确性,为乘用车前副车架的设计和改进提供了CAE分析依据。

关键词：副车架模态分析模态特征 ABAQUS

Record-breaking bifunctional oxygen electrocatalyst accomplished by a data-driven approach for zinc-air batteries

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Journal of Energy Chemistry 2025年第1期100卷 144-145页

作者： Deviprasath Chinnadurai Zhi wei Seh Institute of Materials Research and Engineering (IMRE) Agency for Science Technology and Research (A*STAR)

Rechargeable zinc-air batteries(ZABs) have recently drawn great attention in energy research due to their high theoretical capacity,low costs, and inherently safe nature [1–3]. However, the sluggish cathode reactions necessitate the development of bifunctional oxygen electrocatalysts with lower ΔE indicator values. The ΔE indicator is commonly employed to quantitatively evaluate the electrocatalytic activity of a bifunctional oxygen electrocatalyst,representing the overall overpotential from oxygen reduction reaction(ORR) to oxygen evolution reaction(OER).

关键词： Data-driven approach Bifunctional oxygen electrocatalyst Record breaking performance Zinc-air batteries

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汽车扭转梁焊缝数值模拟分析

汽车实用技术 2019年第11期45卷 96-99页

作者：纪浩李小珊韦友超韦进光秦再武上汽通用五菱汽车股份有限公司技术中心

通过对某车型扭转梁路试易开裂焊缝进行焊接热应力场数值模拟分析,对比不同焊接工艺参数对焊接残余应力的影响,研究表明:(1)不同的焊接电流电压,残余应力值在热影响区域发生突变,且峰值有显著差异。扭转横梁侧的残余应力峰值大于加强板... 详细信息

通过对某车型扭转梁路试易开裂焊缝进行焊接热应力场数值模拟分析,对比不同焊接工艺参数对焊接残余应力的影响,研究表明:(1)不同的焊接电流电压,残余应力值在热影响区域发生突变,且峰值有显著差异。扭转横梁侧的残余应力峰值大于加强板一侧。热影响区残余应力峰值表现出随电流增大应力值减小的趋势,当焊接电流达到240A时应力峰值突增;(2)在焊缝的起弧与收弧端部,残余应力值有波动,峰值大于中部的稳定应力值。(3)采用焊接电流220A、电压24V、速度10mm/s、起收弧长度15mm的焊接工艺参数,残余应力分布最优,该焊接工艺焊接的扭转梁通过多轮耐久路试验证,解决了焊缝开裂问题。

关键词：扭转梁数值模拟残余应力工艺参数

Recent progress in constructing fluorinated solid-electrolyte interphases for stable lithium metal anodes

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International Journal of Minerals,Metallurgy and Materials 2025年第2期32卷 270-291页

作者： Di Zhang Pengfei Lv wei Qin Xin He Yuanhua He Civil Aircraft Fire Science and Safety Engineering Key Laboratory of Sichuan Province College of Civil Aviation Safety EngineeringCivil Aviation Flight University of ChinaGuanghan 618307China School of Chemical Engineering Sichuan UniversityChengdu 610065China

Lithium metal batteries(LMBs)are emerging as a promising energy storage solution owing to their high energy density and specific ***,the non-uniform plating of lithium and the potential rupture of the solid-electrolyte interphase(SEI)during extended cycling use may result in dendrite growth,which can penetrate the separator and pose significant short-circuit *** a stable SEI is essential for the long-term operation of the ***-rich SEI has garnered significant attention for its ability to effectively passivate electrodes,regulate lithium deposition,and inhibit electrolyte *** the structural components and preparation methods of existing fluorinated SEI is crucial for optimizing lithium metal anode *** paper reviews the research on optimizing LiF passivation interfaces to protect lithium metal *** focuses on four types of compositions in fluorinated SEI that work synergistically to enhance SEI *** instance,combining compounds with LiF can further enhance the mechanical strength and ionic conductivity of the *** metals with LiF significantly improves electrochemical performance at the SEI/anode interface,with a necessary focus on reducing electron tunneling ***,incorporating polymers with LiF offers balanced improvements in interfacial toughness and ionic conductivity,though maintaining structural stability over long cycles remains a critical area for future *** alloys combined with LiF increase surface energy and lithium affinity,challenges such as dendrite growth and volume expansion *** summary,this paper emphasizes the crucial role of interfacial structures in LMBs and offers comprehensive guidance for future design and development efforts in battery technology.

关键词： LiF lithium metal anodes solid-electrolyte interphase interface cycling stability

Brain region-specific roles of brain-derived neurotrophic factor in social stress-induced depressive-like behavior

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Neural Regeneration Research 2025年第1期20卷 159-173页

作者： Man Han Deyang Zeng wei Tan Xingxing Chen Shuyuan Bai Qiong Wu Yushan Chen Zhen wei Yufei Mei Yan Zeng Brain Science and Advanced Technology Institute Wuhan University of Science and TechnologyWuhanHubei ProvinceChina Geriatric Hospital Affiliated to Wuhan University of Science and Technology WuhanHubei ProvinceChina School of Public Health Wuhan University of Science and TechnologyWuhanHubei ProvinceChina

Brain-derived neurotrophic factor is a key factor in stress adaptation and avoidance of a social stress behavioral *** studies have shown that brain-derived neurotrophic factor expression in stressed mice is brain region–specific,particularly involving the corticolimbic system,including the ventral tegmental area,nucleus accumbens,prefrontal cortex,amygdala,and *** how brain-derived neurotrophic factor participates in stress processing in different brain regions will deepen our understanding of social stress *** this review,we discuss the expression and regulation of brain-derived neurotrophic factor in stress-sensitive brain regions closely related to the pathophysiology of *** focused on associated molecular pathways and neural circuits,with special attention to the brain-derived neurotrophic factor–tropomyosin receptor kinase B signaling pathway and the ventral tegmental area–nucleus accumbens dopamine *** determined that stress-induced alterations in brain-derived neurotrophic factor levels are likely related to the nature,severity,and duration of stress,especially in the above-mentioned brain regions of the corticolimbic ***,BDNF might be a biological indicator regulating stress-related processes in various brain regions.

关键词： amygdala chronic mild stress chronic social defeat stress corticolimbic system depression hippocampus medial prefrontal cortex nucleus accumbens social stress models ventral tegmental area

From text to image:challenges in integrating vision into ChatGPT for medical image interpretation

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Neural Regeneration Research 2025年第2期20卷 487-488页

作者： Shunsuke Koga wei Du Department of Pathology and Laboratory Medicine Hospital of the University of PennsylvaniaPhiladelphiaPAUSA

Large language models(LLMs),such as ChatGPT developed by OpenAI,represent a significant advancement in artificial intelligence(AI),designed to understand,generate,and interpret human language by analyzing extensive text *** potential integration into clinical settings offers a promising avenue that could transform clinical diagnosis and decision-making processes in the future(Thirunavukarasu et al.,2023).This article aims to provide an in-depth analysis of LLMs’current and potential impact on clinical *** ability to generate differential diagnosis lists underscores their potential as invaluable tools in medical practice and education(Hirosawa et al.,2023;Koga et al.,2023).

关键词： image diagnosis text