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Enhanced antibacterial activity,corrosion resistance and endothelialization potential of Ti-5Cu alloy by oxygen and nitrogen plasma-based surface modification

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Journal of Materials Science & Technology 2024年第1期168卷 250-264页

作者： Xiaotong Zhao Jiali hu Jingjun Nie Dafu Chen Gaowu Qin Erlin Zhang Key Lab.for Anisotropy and Texture of Materials Education Ministry of ChinaSchool of Materials Science and EngineeringNortheastern UniversityShenyang 110819China Research Center for Metallic Wires Northeastern UniversityShenyang 110819China Laboratory of Bone Tissue Engineering Beijing Laboratory of Biomedical MaterialsNational Center for OrthopaedicsBeijing Research Institute of Traumatology and OrthopaedicsBeijing Jishuitan HospitalBeijing 100035China

Antibacterial Ti-5Cu alloy is a promising substitute material for Ti-made cardiovascular implants,so its surface engineering is crucial to expeditin. clinical *** the antibacterial and cardiovas-cular biological benefits of Cu^(2+)and titanium-nitride-oxide(tin.x O y)coatin.s,a Cu_(2)O/CuO-tin.x O y coatin. with upregulated Cu^(2+)release was successfully deposited on Ti-5Cu alloy for the first time using oxygen and nitrogen plasma-based surface *** superhydrophilic and nanostructured Cu_(2)O/CuO-tin.x O y coatin. had a dense structure and was well bonded to the substrate,resultin. in enhanced cor-rosion resistance,while CuO/Cu_(2)O in the coatin. released Cu^(2+)faster than Ti_(2)Cu phase in the *** gratifying,the coatin. demonstrated perfect antibacterial properties(R>99.9%against ***),owing primarily to direct contact sterilization of Cu_(2)O/*** most encouraging phenomenon was that the coatin. dramatically accelerated huVEC adhesion(1.4 times),proliferation(RGR:106%-116%),and particularly migration(RMR:158%-247%)compared with the control *** coatin. extract also signifi-cantly stimulated in vitro angiogenesis *** rapid endothelialization for Cu_(2)O/CuO-tin.x O y coatin. was attributed to the surface nanostructure and Cu^(2+)/NO_(2)−release,which upregulated the angiogenesis-related gene expression of HIF-1α,VEGF,and eNOS to increase VEGF secretion and NO *** of the findings indicated that the Cu_(2)O/CuO-tin.x O y coatin. could enhance the corrosion resistance,an-tibacterial properties,and endothelialization potential of Ti-Cu alloy,displaying great clinical potential in cardiovascular applications.

关键词： Titanium-copper alloy Titanium-nitride-oxide(tin.Oy) Cu^(2+)release Antibacterial property Cell compatibility

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Experimental and first-principles calculation of tin.growth mechanism on CeAlO_(3) surface in steel

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Journal of Iron and Steel Research International 2024年第2期31卷 452-463页

作者： Fei-hu He Jun Peng Fang Zhang Yong-bin Wang Hong-tao Chang School of Materials and Metallurgy Inner Mongolia University of Science and TechnologyBaotou014010Inner MongoliaChina

Regular tin.is harmful to the toughness of steel,and its shape and size need to be *** the behavior of tin.precipitation on CeAlO_(3) surfaces is critical for controlling the morphology and formation process of CeAlO_(3)–tin.composite inclusions in the *** results showed that tin.had a square morphology on the CeAlO3 surface,and electron backscatter diffraction phase identification results revealed the orientation relationship between CeAlO_(3) and tin.as follows:(001)_(CeAlO_(3))//(110)_(tin.,(100)_(CeAlO_(3))/(001)_(tin.,and[010]_(CeAlO_(3))/[110]_(tin..The CeAlO3 crystal structure was studied using the first-principles calculation method,and the adsorption and growth process of tin.on the CeAlO_(3) surface were investigated from the atomic *** calculation results indicate that there is no metallic bonding present in the CeAlO_(3) *** the low-index crystal planes of CeAlO_(3),the(110)planes terminated with O and CeAlO have the highest and lowest surface energies,respectively,with values of 0.373 and 0.051 eV/Å^(2).On the high surface energy plane of CeAlO_(3),the tin.atomic permutation structure is consistent with the arrangement of Ti and N atoms in tin.100)or(110).For the low surface energy plane of CeAlO_(3),the Ti and N atoms are arranged in a ring-like structure.

关键词： CeAlO_(3)-tin.inclusion Orientation relationship Crystal structure First principle Surface energy

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Crystalline cyclic(alkyl)(amino)stannylene via transient stannyne

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Science China Chemistry 2024年

作者： Xinfeng Wang Chaopeng hu Zhihao Lu Liu Leo Liu Department of Chemistry and Research Center for Chemical Biology and Omics Analysis College of Science Southern University of Science and Technology

We demonstrate that a bulky cyclic amino ligand, specifically 1,1,3,3-tetraphenylisoindolinyl, can facilitate the formation of a transient stannyne, endowed with adjacent ambiphilic carbon and tin.centers. This stannyne, manifestin. carbene-like behavior,engages in an unprecedented sequence of reactions, including Buchner ring expansion, [1,3]sigmatropic, and [1,5]-sigmatropic shifts, culminatin. in the synthesis of a stable cyclic(alkyl)(amino)stannylene. This compound represents the first tin.analogue of the well-known cyclic(alkyl)(amino)carbenes. Both the bonding configuration and the formation process of this stannylene are thoroughly analyzed through quantum chemical computations. Our findings pave the way for further synthesis of unusual main group species using bulky isoindolinyl substituents, emphasizing their potential as a versatile tool in synthetic chemistry.

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Unveiling tin.Mineralization in the Baoshan, Southern hunan Province: Implications for Coexistin. Cu and Sn Polymetallic Composite Metallogenic Systems

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Journal of Earth Science 2024年第5期35卷 1781-1785页

作者： Qizhi Yang Tianyang hu Youyue Lu Lei Liu Funian huang Jianfeng Li Zunzun Zhang State Key Laboratory of Lithospheric Evolution Institute of Geology and GeophysicsChinese Academy of Sciences College of Earth and Planetary Sciences University of Chinese Academy of Sciences Mineral Resource Investigation of hunan Province Key Laboratory of Metallogenic Prediction of Nonferrous Metals and Geological Environment Monitoring Ministry of EducationSchool of Geosciences and Info-PhysicsCentral South University Wuhan Centre of Geological Survey China Geological Survey (Central South China Innovation Center for Geosciences) School of Geographical Sciences Liaoning Normal University

0 INTRODUCTION Southern hunan Province(SHP), positioned at the convergence of the Qin-hang zone and the Nanling belt, is distin.uished by its extensive Mesozoic magmatic activities and contemporaneous polymetallic dep... 详细信息

关键词： hunan metallic distin.uished

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二化螟盘绒茧蜂茧丝纤维的形态结构与理化性能

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环境昆虫学报 2024年第5期46卷 1255-1260页

作者：李小雨胡蝶黄廷莉姚洪渭蒋彩英浙江理工大学生命科学与医药学院杭州310018 浙江大学昆虫科学研究所浙江省作物病虫生物学重点实验室水稻生物学国家重点为实验室杭州310058

本文通过扫描电镜(SEM)、氨基酸分析、傅立叶红外光谱(FTIR)、X射线晶体衍射(XRD)和热重分析(TG)等技术对二化螟盘绒茧蜂Cotesia chilonis茧丝纤维的微观形态、氨基酸类别与组成、二级结构和热稳定性等作了分析。结果表明,二化螟盘绒茧... 详细信息

本文通过扫描电镜(SEM)、氨基酸分析、傅立叶红外光谱(FTIR)、X射线晶体衍射(XRD)和热重分析(TG)等技术对二化螟盘绒茧蜂Cotesia chilonis茧丝纤维的微观形态、氨基酸类别与组成、二级结构和热稳定性等作了分析。结果表明,二化螟盘绒茧蜂的茧丝纤维表面较为粗糙,直径为1.89±0.04μm。茧丝纤维主要由碳(60.67%)、氮(21.17%)和氧(17.22%)等元素组成,其丝蛋白主要成分包括天冬氨酸/天冬酰胺、丝氨酸和丙氨酸等;蛋白二级结构主要为β-折叠;其峰值降解温度为332.27℃±2.58℃。本文研究揭示了二化螟盘绒茧蜂茧丝纤维的结构特征与理化性能,为拓展该蜂的应用领域、开发性能优越的非蚕丝蛋白以及设计改造新型丝蛋白纤维提供基础。

关键词：二化螟盘绒茧蜂茧丝纤维形态结构理化性能

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Direct visualization of laser-driven dynamic fragmentation in tin.by in situ x-ray diffraction

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Matter and Radiation at Extremes 2024年第5期9卷 109-114页

作者： Jing Yang Xinxin Wang Liang Xu Qiannan Wang Yi Sun Jiangtao Li Lin Zhang Yinghua Li Yuying Yu Pei Wang Qiang Wu Jianbo hu Laboratory for Shock Wave and Detonation Physics Institute of Fluid PhysicsChina Academy of Engineering PhysicsMianyang 621900China Laboratory of Computational Physics Institute of Applied Physics and Computational MathematicsBeijing 100094China

We present a novel method for investigatin. laser-driven dynamic fragmentation in tin.using in situ X-ray *** experimental results demonstrate the feasibility of the method for simultaneously identifying the phase and temperature of fragments through analysis of the diffraction ***,we observe a deviation from the widely accepted isentropic release assumption,with the temperature of the fragments being found to be more than 100 K higher than expected,owing to the release of plastic work during dynamic *** findings are further verified through extensive large-scale molecular dynamics simulations,in which strain energies are found to be transferred into thermal energies during the nucleation and growth of voids,leading to an increase in *** findings thus provide crucial insights into the impact-driven dynamic fragmentation phenomenon and reveal the significant influence of plastic work on material response during shock release.

关键词： dynamic release diffraction

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Tail states suppression via surface-modification of wide-bandgap perovskites for high-efficiency all-perovskite photovoltaic tandems

Tail states suppression via surface-modification of wide-ban...

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第十一届新型太阳能材料科学与技术学术研讨会

作者： Guojia Fang Xuzhi hu School of Electronic and Electrical Engineering Wuhan Textile University

As an essential light-absorbing material in perovskite-based tandem solar cells,widebandgap（WBG） perovskite has garnered extensive ***,due to severe non-radiative recombination from tail states,as well as photoinduced phase segregation and unoptimized charge transfer,WBG perovskite solar cells（PSCs） typically display significant open-circuit voltage（VOC） loss and low fill factor（FF）.In this work,we report to modify the 1.68 eV WBG perovskite film upon optimized surface passivation with 1,3-propanediammonium iodide（PDAI）.Time-resolved microwave conductivity measurement is employed to analyze the tail states,mobilities of charge carriers and the rate constants of recombination in perovskite *** results indicate that the optimized surface modification strategy not only enhances film quality,boosts carrier transport,but also suppresses tail states and therefore diminishes non-radiative recombination,consequently elevatin. the VOC and FF of the ***,the PDAI-assisted WBG PSCs deliver an optimal efficiency of 21.48 %,accompanied by a V of 1.243 ***,the integration of a narrow-bandgap tin.lead PSC with a semi-transparent WBG PSC results in a four-terminal perovskite/perovskite tandem solar cell,showcasing an efficiency surpassing 28 %.Our research offers a practical approach for producing efficient WBG PSCs and tandem solar cells.

关键词： Perovskite solar cell Tandem Wide bandgap Charge carrier transport

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Effects of a Premixed Layer on the Richtmyer–Meshkov Instability

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Chinese Physics Letters 2011年第11期28卷 155-157页

作者： TIAN Bao-Lin ZhanG Xin-tin.QI Jin WANG Shuang-hu Laboratory of Computational Physics Institute of Applied Physics and Computational MathematicsBeijing 100094 Ecole Centrale de Pekin Beihang UniversityBeijing 100191

The effects of a premixed layer on the Richmyer–Meshkov instability(RMI)are studied by settin. a density gradient for the first shocked fluid in the RMI *** RMI with initial density gradients are simulated by using a high resolution arbitrary Lagrangian–Eulerian *** effects of density gradient and gradient width are analyzed on the basis of the simulation results for the shock from a light fluid to a heavy fluid and for the shock from a heavy fluid to a light ***,the premixed layer can suppress the perturbation growth,and the detailed effects are different depending on the detailed premixed *** width of the premixed layer has a very light influence on the perturbation,while the density gradient has quite a significant effect on two kinds of RMIs.

关键词： configuration Effects mixed

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Reversible Zn stripping/platin. achieved by surface thin Sn layer for high-performance aqueous zinc metal batteries

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Journal of Materials Science & Technology 2022年第22期117卷 72-78页

作者： Bingfeng Cui Yu Gao Xiaopeng han Wenbin hu Tianjin Key Laboratory of Composite and Functional Materials Key Laboratory of Advanced Ceramics and Machining Technology(Ministry of Education)School of Materials Science and EngineeringTianjin UniversityTianjin 300350China

Aqueous zinc metal batteries (ZMBs) are considered as the most promising candidate for large-scale energy storage system due to their abundant reserves and high safety. To achieve highly stable zinc metalbatteries, it is imperative to inhibit the unavoidable dendrite growth, which leads to the non-uniformzinc deposition and even makes the battery short circuit. Herein, Sn coatin. is loaded on copper foil(SCF) by a simple electrodeposition to guide the uniform zinc deposition, which not only lowers the zincnucleation overpotential but also promotes the uniform zinc deposition/dissolution. As a result, the Znplated SCF (Zn@SCF) anode presents a low voltage hysteresis of ∼40 mV and a superior stability over270 h in symmetric cells at a current density of 1 mA cm^(−2). Furthermore, the Zn@SCF anode can realizethe improved performance for full cells paired with α-MnO_(2) cathode. This work provides a simple andeffective approach to modify the Zn anode for improved electrochemical performance of ZMBs.

关键词： tin.coatin.s Uniform zinc deposition Zinc anode Zinc metal batteries

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Partial Atomic tin.Nanocomplex Pillared Few-Layered Ti_(3)C_(2)Tx MXenes for Superior Lithium-Ion Storage

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Nano-Micro Letters 2020年第6期12卷 176-189页

作者： Shunlong Zhang hangjun Ying Bin Yuan Renzong hu Wei-Qiang han School of Materials Science and Engineering Zhejiang University310027 HangzhouPeople’s Republic of China School of Materials Science and Engineering South China University of Technology510641 GuangzhouPeople’s Republic of China Key Laboratory of Advanced Energy Storage Materials of Guangdong Province 510641 GuangzhouPeople’s Republic of China

MXenes have attracted great interest in various fields,and pillared MXenes open a new path with larger interlayer ***,the further study of pillared MXenes is blocked at multilayered state due to serious restacking phenomenon of few-layered MXene *** this work,for the first time,we designed a facile NH4+method to fundamentally solve the restacking issues of MXene nanosheets and succeeded in achieving pillared few-layered *** nanocomplex pillared few-layered Ti3C2Tx(STCT)composites were synthesized by introducing atomic Sn nanocomplex into interlayer of pillared few-layered Ti3C2Tx MXenes via pillaring *** MXene matrix can inhibit Sn nanocomplex particles agglomeration and serve as conductive ***,the Sn nanocomplex particles can further open the interlayer spacing of Ti3C2Tx during lithiation/delithiation processes and therefore generate extra *** from the“pillar effect,”the STCT composites can maintain 1016 mAh g^?1 after 1200 cycles at 2000 mA g^?1 and deliver a stable capacity of 680 mAh g^?1 at 5 A g^?1,showing one of the best performances among MXene-based *** work will provide a new way for the development of pillared MXenes and their energy storage due to significant breakthrough from multilayered state to few-layered one.

关键词： Pillared MXene Few-layered MXene tin nanocomplex Lithium-ion storage

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