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Role of grain boundary character on Bi segregation-induced embrittlement in ultrahigh-purity copper

journal of Materials Science & Technology 2023年第28期159卷 52-61页

作者： Y.X.Hua K.X.Song H.T.Liu j.w.wang C.M.Zhang Y.j.Zhou B.Pang j.T.Song j.L.He H.L.Zhao School of Materials Science and Engineering Henan University of Science and TechnologyLuoyang 471023China Henan Academy of Sciences Zhengzhou 450000China Henan Key Laboratory of Advanced Conductor Materials Zhengzhou 450046China Provincial and Ministerial Co-construction of Collaborative Innovation Center of Nonferrous New Materials and Advanced Processing Technology Luoyang 471023China Center of Electron Microscopy and State Key Laboratory of Silicon Materials School of Materials Science and EngineeringZhejiang UniversityHangzhou 310027China College of Materials Science and Engineering Zhengzhou UniversityZhengzhou 450001China

Bismuth(Bi),as an impurity element in copper and copper-based alloys,usually has a strong tendency of grain boundary(GB)segregation,which depends on the GB ***,the influence of such a segregation on the properties of ultrahigh-purity copper has been rarely reported and the exact structural arrangements of Bi atoms at different GBs remain largely *** this study,we investigated the influ-ence of trace amounts of Bi(50-300 wt ppm)on the ductility of an ultrahigh-purity copper(99.99999%)in the range of room temperature to 900°*** tensile results show that the addition of Bi seriously damages the ductility of the ultrahigh-purity copper at temperatures of 450-900°C,which is due to the GB segregation of *** this basis,such a segregation behavior at different types of GBs,including high and low angle GBs(HAGBs/LAGBs),and twin boundaries(TBs),via the scanning electron microscope-electron backscattered diffraction(SEM-EBSD)and aberration-corrected scanning transmission electron microscope(AC-STEM)investigations,combined with the first-principles calculations were systematically *** atomistic characterizations demonstrate an anisotropic Bi segregation,where severe enrich-ment of Bi atoms typically occurs at the HAGBs,while the absence of Bi adsorption prevails at LAGBs or *** particular,the segregated Bi at random HAGBs exhibited the directional bilayer adsorption,while the special symmetrical7 HAGB presented a unique Bi-rich cluster *** findings pro-vide a comprehensive experimental and computational understanding on the atomic-scale segregation of impurities in metallic materials.

关键词： Grain boundary character Embrittlement Bi segregation Atomic configuration Ultrahigh-purity copper

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Self-healing of hybridly polarized Bessel beam in the atomic vapor with polarization dependent absorption

Self-healing of hybridly polarized Bessel beam in the atomic...

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第十八届全国量子光学学术会议

作者：陈云 j.w.wang X.Yang D.wei H.Gao F.L.Li 西安交通大学 Shaanxi Key Laboratory of Quantum Information and Quantum Optoelectronic Devices Xi'an Jiaotong University

The Bessel beams have attracted extensive research interests in the past decades because of their two remarkable features, non-diffractive propagation and self-healing. On the other hand, as the vector beams with transversely inhomogeneous state of polarization have intensively studied recently, the vector Bessel beams which possess the properties of the Bessel beams and the vector beams were proposed and have been studied on the aspect of self-healing. Previous works mainly investigated the self-healing of the intensities and the spatially inhomogeneous states of polarization of vector Bessel beams after propagation through various thin opaque obstacles. There are limited studies on self-healing of vector Bessel beam in nonlinear medium. In this work, we experimentally measured the self-healing of a hybridly polarized Bessel beam which through a rubidium vapor loaded with external magenetic fields. A hybridly polarized Bessel beam was experimentally generated via a digital version of Durnin’s method. Then, with the effect of external magenetic fields, the rubidium vapor presented polarization dependent absorption. Thus under the different degrees of breaking, the vector Bessel beam show different degrees of self-healing. To make the results more convincing, we simulated the process of self healing in atomic vapor. The numerical simulations agree well with the experimental results. Those studies may have applications in particle trapping and microscopy.

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提出一种基于深度学习的方法改进胸部CT扫描肺结节的诊断准确性

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国际医学放射学杂志 2022年第1期 115-116页

作者： Y.w.wang j.w.wang S.X.Yang L.L.Qi H.L.Lin Z.Zhou 常俊琦

摘要目的比较胸部CT上基于深度学习（DL）的和放射科医生的对肺部结节诊断的效能。方法纳入150个由放射科医师评估、报告且经病理证实的肺结节（60%为恶性）。

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CT诊断恶性胸膜下纯磨玻璃结节胸膜及间质侵犯的初步研究

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国际医学放射学杂志 2019年第2期42卷 246-246页

作者： Q.Zhao j.w.wang L.Yang L.Y.Xue w.w.Lu 喻诗琴(译) 赵世华(校) Department of Diagnostic Radiology National Cancer Center/Cancer HospitalChinese Academy of Medical Sciences and Peking Union Medical College17 Pan Jia Yuan Nan-liBeijing 100021China 不详

目的通过薄层CT对胸膜下恶性纯磨玻璃结节(pGGN)影像特征的综合分析,评估脏胸膜侵犯(VPI)风险,提高对与胸膜接触的pGGN中浸润性腺癌(IA)的诊断。方法回顾性分析2012年1月—2015年12月我院满足以下标准的115例可疑病人的CT结果及临床资料... 详细信息

目的通过薄层CT对胸膜下恶性纯磨玻璃结节(pGGN)影像特征的综合分析,评估脏胸膜侵犯(VPI)风险,提高对与胸膜接触的pGGN中浸润性腺癌(IA)的诊断。方法回顾性分析2012年1月—2015年12月我院满足以下标准的115例可疑病人的CT结果及临床资料:(a)术前1个月经薄层CT证实与胸膜接触的pGGN;(b)手术证实pGGN恶性。

关键词：磨玻璃结节 CT

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超声引导下的空芯针活检在颈部淋巴结肿大中的作用:一项对6695例病例的回顾性研究

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国际医学放射学杂志 2018年第4期 486-486页

作者： F.Han M.Xu T.Xie j.w.wang Q.G.Lin Z.X.Guo 郑孝飞 Department of Ultrasound State Key Laboratory of Oncology in South ChinaCollaborative Innovation Center for Cancer MedicineSun Yat-Sen University Cancer Center

目的为确定超声引导下的空芯针活检(US-CNB)在颈部淋巴结肿大中的诊断率并找出影响其诊断准确率的因素。方法回顾性分析2004—2017年间因颈部淋巴结肿大而行超声引导下的空芯针活检的6 695例记录。结果92.19%(6 172/6 695)的病例取得了... 详细信息

目的为确定超声引导下的空芯针活检(US-CNB)在颈部淋巴结肿大中的诊断率并找出影响其诊断准确率的因素。方法回顾性分析2004—2017年间因颈部淋巴结肿大而行超声引导下的空芯针活检的6 695例记录。结果92.19%(6 172/6 695)的病例取得了足够的组织样本。大多数淋巴结(67.65%)为恶性(转移瘤4 131、淋巴瘤398)。鉴别良恶性病变的总体准确度为91.70%(6 139/6 695)。对于取得了足够组织样本的超声引导下的空芯针活检(US-CNB),其敏感度、特异度和准确度分别为99.70%、100%和99.46%。US-CNB成功与否与淋巴结的大小、性质(良性或恶性)和位置、穿刺的深度密切相关,而与活检针的尺寸(P=0.665)、取得的针芯组织的量(P=0.324)或恶性肿瘤病史(P=0.060)均无关。未见与活检过程相关的严重并发症。结论 US-CNB是一项安全且有效的诊断颈部淋巴结肿大的方法,该研究的发现可能有助于最大化诊断的准确率和充分利用取样过程,同时把有创性操作的损害最小化。

关键词：超声引导下 CNB 颈部淋巴结肿大

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NECAB family of neuronal calcium-binding proteins in health and disease

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Neural Regeneration Research 2025年第5期20卷 1236-1243页

作者： Diones Bueno Michael K.E.Schafer Sudena wang Michael j.Schmeisser Axel Methner Institute for Molecular Medicine University Medical Center of the Johannes Gutenberg-UniversityMainzGermany Department of Anesthesiology University Medical Center of the Johannes Gutenberg-UniversityMainzGermany Institute of Anatomy University Medical Center of the Johannes Gutenberg-UniversityMainzGermany

The N-terminal EF-hand calcium-binding proteins 1–3(NECAB1–3) constitute a family of predominantly neuronal proteins characterized by the presence of at least one EF-hand calcium-binding domain and a functionally less well characterized C-terminal antibiotic biosynthesis monooxygenase domain. All three family members were initially discovered due to their interactions with other proteins. NECAB1 associates with synaptotagmin-1, a critical neuronal protein involved in membrane trafficking and synaptic vesicle exocytosis. NECAB2 interacts with predominantly striatal G-protein-coupled receptors, while NECAB3 partners with amyloid-β A4 precursor protein-binding family A members 2 and 3, key regulators of amyloid-β production. This demonstrates the capacity of the family for interactions with various classes of proteins. NECAB proteins exhibit distinct subcellular localizations: NECAB1 is found in the nucleus and cytosol, NECAB2 resides in endosomes and the plasma membrane, and NECAB3 is present in the endoplasmic reticulum and Golgi apparatus. The antibiotic biosynthesis monooxygenase domain, an evolutionarily ancient component, is akin to atypical heme oxygenases in prokaryotes but is not wellcharacterized in vertebrates. Prokaryotic antibiotic biosynthesis monooxygenase domains typically form dimers, suggesting that calcium-mediated conformational changes in NECAB proteins may induce antibiotic biosynthesis monooxygenase domain dimerization, potentially activating some enzymatic properties. However, the substrate for this enzymatic activity remains uncertain. Alternatively, calcium-mediated conformational changes might influence protein interactions or the subcellular localization of NECAB proteins by controlling the availability of protein–protein interaction domains situated between the EF hands and the antibiotic biosynthesis monooxygenase domain. This review summarizes what is known about genomic organization, tissue expression, intracellular localization, interac

关键词： calcium EF hand mitochondria nervous system signal transduction

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Rational modulation of fluorophosphate cathode by anionic groups to reduce the polarization behavior for fast-charging sodium-ion batteries

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journal of Energy Chemistry 2025年第1期100卷 509-521页

作者： Xinyuan wang Fan Zhang Xingyu Zhou Qian wang Changyu Liu Yangyang Liu Hui wang Xiaojie Liu Key Laboratory of Synthetic and Natural Functional Molecule of the Ministry of Education College of Chemistry & Materials Science Northwest University

Na3V2（PO4）2O2F （VP） is recognized as a promising cathode material for sodium-ion batteries due to its stable structural framework and high specific *** functional theory （DFT） and finite element simulations show that incorporating SO42-into VP decreases its band gap,lowers the migration energy barrier,and ensures a uniform Na+concentration gradient and stress distribution during charge and discharge ***,the average Na+diffusion coefficient of Na3V2（PO4）1.95（SO4）0.05O2F（VPS-1） is roughly double that of VP,leading to enhanced rate capability (80 C,75.5 mAh g-1) and cycling stability (111.0 mAh g-1capacity after 1000 cycles at 10 C current density) for ***-1 exhibits outstanding fast-charging capabilities,achieving an 80%state of charge in just 8.1 *** assembled VPS-1//SbSn/NPC full cell demonstrated stable cycling over 200 cycles at a high 5 C current,maintaining an average coulombic efficiency of 95.35%.

关键词： Anionic group modulation Polarization behavior Fast-charging Sodium-ion battery Fluorophosphate Cathode

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High-energy-density lithium manganese iron phosphate for lithium-ion batteries: Progresses, challenges, and prospects

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journal of Energy Chemistry 2025年第1期100卷 1-17页

作者： Bokun Zhang Xiaoyun wang Shuai wang Yan Li Libo Chen Handong jiao Zhijing Yu jiguo Tu State Key Laboratory of Advanced Metallurgy University of Science and Technology Beijing Research Institute for Intelligent wearable Systems The Hong Kong Polytechnic University Institute of Advanced Structure Technology Beijing Institute of Technology

The soaring demand for smart portable electronics and electric vehicles is propelling the advancements in high-energy–density lithium-ion *** manganese iron phosphate (LiMnxFe1-xPO4) has garnered significant attention as a promising positive electrode material for lithium-ion batteries due to its advantages of low cost,high safety,long cycle life,high voltage,good high-temperature performance,and high energy *** LiMnxFe1-xPO4has made significant breakthroughs in the past few decades,there are still facing great challenges in poor electronic conductivity and Li-ion diffusion,manganese dissolution affecting battery cycling performance,as well as low tap *** review systematically summarizes the reaction mechanisms,various synthesis methods,and electrochemical properties of LiMnxFe1-xPO4to analyze reaction processes accurately and guide material ***,the main challenges currently faced are concluded,and the corresponding various modification strategies are discussed to enhance the reaction kinetics and electrochemical performance of LiMnxFe1-xPO4,including multi-scale particle regulation,heteroatom doping,surface coating,as well as microscopic morphology ***,in view of the current research challenges faced by intrinsic reaction processes,kinetics,and energy storage applications,the promising research directions are *** importantly,it is expected to provide key insights into the development of high-performance and stable LiMnxFe1-xPO4materials,to achieve practical energy storage requirements.

关键词： Semiconductor doping

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Flexible molecules dedicate to release strain of inverted inorganic perovskite solar cell

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journal of Energy Chemistry 2025年第1期100卷 87-93页

作者： Hongrui Sun Sanlong wang Pengyang wang Yali Liu Shanshan Qi Biao Shi Ying Zhao Xiaodan Zhang Institute of Photoelectronic Thin Film Devices and Technology Renewable Energy Conversion and Storage Center State Key Laboratory of Photovoltaic Materials and CellsNankai University Key Laboratory of Photoelectronic Thin Film Devices and Technology of Tianjin Haihe Laboratory of Sustainable Chemical Transformations Engineering Research Center of Thin Film Photoelectronic Technology of Ministry of Education Collaborative Innovation Center of Chemical Science and Engineering (Tianjin)

The tensile strain in inorganic perovskite films induced by thermal annealing is one of the primary factors contributing to the inefficiency and instability of inorganic perovskite solar cells （IPSCs）,which reduces the defect formation ***,a flexible molecule 5-maleimidovaleric acid （5-MVA） was introduced as a strain buffer to release the residual strain of *** anhydride and carboxyl groups in 5-MVA interact strongly with the uncoordinated Pb2+through Lewis acid-base reaction,thus tightly“pull”the perovskite *** in-between soft carbon chain increased the structural flexibility of CsPbI2.85Br0.15perovskite materials,which effectively relieved the intrinsic internal strain of CsPbI2.85Br0.15,resisted the corrosion of external strain,and also reduced the formation of defects such as VIand *** addition,the introduction of 5-MVA improved crystal quality,passivated residual defects,and narrowed energy level ***,power conversion efficiency （PCE） of NiOxbased inverted IPSCs increased from 19.25% to 20.82% with the open-circuit voltage enhanced from 1.164 V to 1.230 *** release of strain also improved the stability of CsPbI2.85Br0.15perovskite films and devices.

关键词： Perovskite solar cells

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A functional tacrolimus-releasing nerve wrap for enhancing nerve regeneration following surgical nerve repair

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Neural Regeneration Research 2025年第1期20卷 291-304页

作者： Simeon C.Daeschler Katelyn j.w.So Konstantin Feinberg Marina Manoraj jenny Cheung jennifer Zhang Kaveh Mirmoeini jPaul Santerre Tessa Gordon Gregory HBorschel SickKids Research Institute Neuroscience and Mental Health ProgramTorontoONCanada Institute of Biomaterials and Biomedical Engineering University of TorontoTorontoONCanada Indiana University School of Medicine IndianapolisINUSA Division of Plastic and Reconstructive Surgery the Hospital for Sick ChildrenTorontoONCanada Translational Biology and Engineering Program Ted Rogers Centre for Heart ResearchInstitute of Biomedical EngineeringFaculty of DentistryUniversity of TorontoTorontoONCanada

Axonal regeneration following surgical nerve repair is slow and often incomplete,resulting in poor functional recovery which sometimes contributes to lifelong ***,there are no FDA-approved therapies available to promote nerve *** accelerates axonal regeneration,but systemic side effects presently outweigh its potential benefits for peripheral nerve *** authors describe herein a biodegradable polyurethane-based drug delivery system for the sustained local release of tacrolimus at the nerve repair site,with suitable properties for scalable production and clinical application,aiming to promote nerve regeneration and functional recovery with minimal systemic drug *** is encapsulated into co-axially electrospun polycarbonate-urethane nanofibers to generate an implantable nerve wrap that releases therapeutic doses of bioactive tacrolimus over 31 *** and drug loading are adjustable for applications in small and large caliber nerves,and the wrap degrades within 120 days into biocompatible *** released from the nerve wrap promotes axon elongation in vitro and accelerates nerve regeneration and functional recovery in preclinical nerve repair models while off-target systemic drug exposure is reduced by 80%compared with systemic *** its surgical suitability and preclinical efficacy and safety,this system may provide a readily translatable approach to support axonal regeneration and recovery in patients undergoing nerve surgery.

关键词： biodegradable local drug delivery nerve injury nerve regeneration nerve wrap tacrolimus

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