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Polydopamine-modified metal-organic frameworks nanoparticles enhance the corrosion resistance and bioactivity of polycaprolactone coating on high-purity magnesium

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Journal of Magnesium and Alloys 2024年第5期12卷 2070-2089页

作者： Qingyun Fu Shaojie He Junjie Yang Ziyu Su Ping Li Xincheng Yu Weihong Jin Shulan Xu Zhentao Yu Dingsheng Zha Center of Oral Implantology Stomatological HospitalSouthern Medical UniversityGuangzhouChina Panyu Hospital of Chinese Medicine Guangzhou 511400China institute of Advanced Wear&Corrosion Resistant and Functional Materials Jinan UniversityGuangzhou 510632China First Affiliated Hospital of jinan university Guangzhou 510630China

Biodegradable magnesium(Mg)and its alloys exhibit excellent biocompatibility and mechanical compatibility,demonstrating tremendous potential for applications in ***,the rapid degradation rate has limited their clinical ***(PCL)is commonly employed as a polymer coating to impede the rapid degradation of ***,its long-term anti-corrosion capability and bioactivity are *** address these issues,polydopamine(PDA)-modified zeolitic imidazolate framework-8(PZIF-8)bioactive nanoparticles are fabricated and incorporated into the PCL *** PZIF-8 particles,featuring catechol motifs,can enhance the compactness of the PCL coating,reduce its defects,and possess biomineralization ability,thereby effectively improving its anti-corrosive and bioactive ***,the active substances released from the degradation of the PZIF-8 particles such as Zn^(2+)and PDA are beneficial for *** corrosion tests indicate that the corrosion current density of PCL-treated sample decreases by more than one order of magnitude and the amount of H_(2)released decreases from 0.23±0.12 to 0.08±0.08 ml cm^(-2)after doping with the ***,the improved corrosion resistance and released PDA and Zn^(2+)from the coating can promote osteogenic differentiation by up-regulating the expression of alkaline phosphatase activity,related osteogenic genes,and *** addition,in vivo implantation experiments in rabbit femur defects further offer strong evidence that the doping of PZIF-8 nanoparticles accelerates bone reconstruction of the PCL *** summary,this work implies a new strategy to fabricate a PCL-based coating on Mg-based implants by introducing the PZIF-8 particles for orthopedic applications.

关键词： Polydopamine ZIF-8 High-purity magnesium Polycaprolactone coating Anticorrosion Bone regeneration

Advances in the differentiation of pluripotent stem cells into vascular cells

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World Journal of Stem Cells 2024年第2期16卷 137-150页

作者： Yi-Chang Jiao Ying-Xin Wang Wen-Zhu Liu Jing-Wen Xu Yu-Ying Zhao Chuan-Zhu Yan Fu-Chen Liu Department of Neurology Qilu Hospital of Shandong UniversityJinan 250012Shandong ProvinceChina Research institute of Neuromuscular and Neurodegenerative Diseases Qilu Hospital of Shandong UniversityJinan 250012Shandong ProvinceChina Mitochondrial Medicine Laboratory Qilu Hospital(Qingdao)of Shandong UniversityQingdao 266103Shandong ProvinceChina Brain Science Research institute Shandong UniversityJinan 250012Shandong ProvinceChina

Blood vessels constitute a closed pipe system distributed throughout the body,transporting blood from the heart to other organs and delivering metabolic waste products back to the lungs and *** in blood vessels are related to many disorders like stroke,myocardial infarction,aneurysm,and diabetes,which are important causes of death *** research for new appro-aches to disease modeling and effective treatment is needed due to the huge socio-economic burden on healthcare *** mice or rats have been widely used,applying data from animal studies to human-specific vascular physiology and pathology is *** rise of induced pluripotent stem cells(iPSCs)provides a reliable in vitro resource for disease modeling,regenerative medicine,and drug discovery because they carry all human genetic information and have the ability to directionally differentiate into any type of human *** review summarizes the latest progress from the establishment of iPSCs,the strategies for differentiating iPSCs into vascular cells,and the in vivo trans-plantation of these vascular *** also introduces the application of these technologies in disease modeling,drug screening,and regenerative ***,the application of high-tech tools,such as omics analysis and high-throughput sequencing,in this field is reviewed.

关键词： Induced pluripotent stem cell Blood vessels Vascular organoids Endothelial cells Smooth muscle cells Pericytes Tissue engineering vascular graft

Vibration and noise mechanism of a 110 kV transformer under DC bias based on finite element method

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Global Energy Interconnection 2024年第4期7卷 503-512页

作者： Ziyang Li Xujun Lang Bo Yang Xiaolin Liu Hao Wang Zhang Li Shandong Electric Power Engineering Consulting institute Co. Ltd.Jinan 250013P.R.China School of Electrical Engineering Shandong UniversityJinan 250061P.R.China

Global energy and environmental issues are becoming increasingly problematic,and the vibration and noise problem of 110 kV transformers,which are the most widely distributed,have attracted widespread attention from both inside and outside the *** bias is one of the main contributing factors to vibration noise during the normal operation of *** clarify the vibration and noise mechanism of a 110 kV transformer under a DC bias,a multi-field coupling model of a 110 kV transformer was established using the finite element *** electromagnetic,vibration,and noise characteristics during the DC bias process were compared and quantified through field circuit coupling in parallel with the power frequency of AC,harmonic,and DC power *** was found that a DC bias can cause significant distortions in the magnetic flux density,force,and displacement distributions of the core and *** contributions of the DC bias effect to the core and winding are different at Kdc=*** this point,the core approached saturation,and the increase in the core force and displacement ***,the saturation of the core increased the leakage flux,and the stress and displacement of the winding increased *** sound field distribution characteristics of the 110 kV transformer under a DC bias are related to the force *** the DC bias coefficient was 1.25,the noise sound pressure level reached 73.6 dB.

关键词： Transformer DC bias Vibration Noise

Research on Electromagnetic Wave Absorption Based on Electrospinning Technology

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Chinese Journal of Chemistry 2024年第7期42卷 777-789页

作者： Baoding Li Jing Qiao Yue Liu Haoyuan Tian Wei Liu Qilei Wu Zhou Wang Jiurong Liu Zhihui Zeng Key Laboratoryfor Liquid-Solid StructuralEvolution and Processing of Materials Schoolof Materials Science and EngineeringShandong UniversityJinanShandong 250061China China North Industries Group 53rd Research institute JinanShandong 250000China School of Mechanical Engineering Shandong UniversityJinanShandong 250061China institute of Crystal Materials State Key Laboratory of Crystal MaterialsShandong UniversityJinanShandong 250100China Shenzhen Research institute of Shandong university ShenzhenGuangdong 518057China Science and Technology on Electromagnetic Compatibility Laboratory China Ship Development and Design CentreWuhanHubei 430064China suzhou Research institute of Shandong university SuzhouJiangsu215123China

At present,in order to overcome electromagnetic interference and prevent electromagnetic harm,the research of new and efficient electromagnetic wave absorbing materials has become the research focus in the field of materials *** one-dimensional structure can promote the impedance matching and attenuation characteristics of the absorbing ***,as an effective method to prepare nanofibers with high length-diameter ratio,has been widely concerned because it is suitable for struc-tural design of various *** this paper,the research progress and absorption properties of nano-fiber materials prepared by electrospinning combined with different processes are introduced.

关键词： Electromagnetic wave(EMW)absorbing Electrospinning Nanofiber Impedance matching Nanocomposite

Metal-encapsulated nitrogen-doped carbon nanotube arrays electrode for enhancing sulfion oxidation reaction and hydrogen evolution reaction by regulating of intermediate adsorption

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Chinese Chemical Letters 2024年第8期35卷 533-538页

作者： Xiao Li Wanqiang Yu Yujie Wang Ruiying Liu Qingquan Yu Riming Hu Xuchuan Jiang Qingsheng Gao Hong Liu Jiayuan Yu Weijia Zhou institute for Advanced Interdisciplinary Research(iAIR) School of Chemistry and Chemical EngineeringUniversity of JinanJi’nan 250022China institute for Smart Materials&Engineering School of Materials Science and EngineeringUniversity of JinanJi’nan 250022China College of Chemistry and Materials Science and Guangdong Provincial Key Laboratory of Functional Supramolecular Coordination Materials and ApplicationsJinan UniversityGuangzhou 510632China State Key Laboratory of Crystal Materials Shandong UniversityJi’nan 250100China

For treatment of sulfion-containing wastewater,coupling the electrochemical sulfion oxidation reaction(SOR)with hydrogen evolution reaction(HER)can be an ideal way for sulfur and H_(2)resources ***,we synthesize a metal-modified carbon nanotube arrays electrode(Co@N-CNTs/CC)for SOR and *** electrode has excellent performance for SOR and HER attributed to the unique array *** can achieve 99.36 mA/cm^(2)at 0.6 V for SOR,and 10 mA/cm^(2)at 0.067 V for *** functional theory calculations verify that metal modification is able to regulate the electronic structure of carbon nanotube,which is able to optimize the adsorption of *** Co@N-CNTs/CC as bifunctional elec-trodes to establish a hybrid electrolytic cell can reduce about 67%of energy consumption compared with the traditional water splitting electrolytic ***,the hybrid electrolytic cell is used to treat actual sulfion-containing wastewater,achieving the sulfur yield of 30 mg h^(−1)cm^(−2)and the hydrogen production of 0.64 mL/min.

关键词： Sulfion oxidation reaction Hydrogen evolution reaction Nitrogen-doping carbon nanotube Core-shell structure Resource upgrade

Simple substituents make big differences in photophysical performances of 2,1,3-benzothiadizole-conjugated spiropyrans

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Chinese Journal of Chemical Engineering 2024年第8期72卷 53-59页

作者： Xiaoming Zhu Yunting Liu Mingyue Cao Guangle Niu State Key Laboratory of Crystal Materials Shandong UniversityJinan 250100China School of Chemistry and Chemical Engineering Beijing Institute of TechnologyBeijing 100081China

Developing multifunctional spiropyran dyes is of particular importance in diverse *** the present study,we synthesized two 2,1,3-benzothiadiazole-conjugated spiropyrans(BT-SP-NO2and BTSP-NMe2)with distinct *** donor-acceptor-structured spiropyrans exhibited typical twisted intramolecular charge transfer features and strong emissions in low-polarity solvents with fluorescence quantum yields(QYs)of up to 90.7%.Like traditional spiropyrans,the electron-acceptor-substituted BT-SP-NO2exhibited excellent photochromic behavior under multiple alternating UV—Vis irradiation,while the electron-donor-substituted BT-SP-NMe2was an acidochromic *** addition,the substituent groups distinctly affected the packing modes of these spiropyrans in the solid ***-NMe2showed a much stronger solid-state emission(QY of 59.0%)than ***,these two dyes were utilized as biocompatible probes for the specific light-up imaging of lipid droplets.

关键词： Spiropyran 2,1,3-Benzothiadiazole Photochromism Fluorescent dye Fluorescence imaging

Nitrogen‑Doped Magnetic‑Dielectric‑Carbon Aerogel for High‑Efficiency Electromagnetic Wave Absorption

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Nano-Micro Letters 2024年第1期16卷 313-327页

作者： Shijie Wang Xue Zhang Shuyan Hao Jing Qiao Zhou Wang Lili Wu Jiurong Liu Fenglong Wang Key Laboratory for Liquid‑Solid Structural Evolution and Processing of Materials Ministry of Education Shandong UniversityJinan 250061People’s Republic of China School of Mechanical Engineering Shandong UniversityJinan 250061People’s Republic of China Shenzhen Research institute of Shandong university Shenzhen 518057GuangdongPeople’s Republic of China

Carbonbased aerogels derived from biomass chitosan are encountering a flourishing moment in electromagnetic protection on account of lightweight,controllable fabrication and ***,developing a facile construction method of component design with carbon-based aerogels for high-efficiency electromagnetic wave absorption(EWA)materials with a broad effective absorption bandwidth(EAB)and strong absorption yet hits some ***,the nitrogen-doped magnetic-dielectric-carbon aerogel was obtained via ice template method followed by carbonization treatment,homogeneous and abundant nickel(Ni)and manganese oxide(MnO)particles in situ grew on the carbon *** to the optimization of impedance matching of dielectric/magnetic components to carbon aerogels,the nitrogen-doped magnetic-dielectric-carbon aerogel(Ni/MnO-CA)suggests a praiseworthy EWA performance,with an ultra-wide EAB of 7.36 GHz and a minimum reflection loss(RLmin)of−64.09 dB,while achieving a specific reflection loss of−253.32 dB mm−***,the aerogel reveals excellent radar stealth,infrared stealth,and thermal management ***,the high-performance,easy fabricated and multifunctional nickel/manganese oxide/carbon aerogels have broad application aspects for electromagnetic protection,electronic devices and aerospace.

关键词： Electromagnetic wave absorption Wide bandwidth Dielectric-magnetic synergy Multifunction

具有丰富孤对电子的亲锌超分子分子通道实现高度稳定锌阳极

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Science China Materials 2024年第5期67卷 1455-1463页

作者：孟超谭昊刘宏王建军 State Key Lab of Crystal Materials Institute of Crystal MaterialShandong UniversityJinan250100China State Shenzhen Research institute Shandong UniversityShenZhen518057China jinan institute of Quantum Technology Jinan BranchHefei National LaboratoryJinan250101China

在柔性设备和静态储能电网应用中,可充电水性锌离子电池展现出巨大的潜力.但其发展受到界面不稳定性引起的副反应及枝晶生长的阻碍.本研究中,我们采用了一种新颖的电解液设计,通过含大量孤电子对的亲锌葫芦[7]超分子来应对这一挑战.这... 详细信息

在柔性设备和静态储能电网应用中,可充电水性锌离子电池展现出巨大的潜力.但其发展受到界面不稳定性引起的副反应及枝晶生长的阻碍.本研究中,我们采用了一种新颖的电解液设计,通过含大量孤电子对的亲锌葫芦[7]超分子来应对这一挑战.这些超分子因其独特的分子结构,能够在电化学循环中有效地吸纳和固定Zn离子,从而有效避免了Zn离子的无序迁移和枝晶的形成.超分子中丰富的孤对电子提供的Lewis碱性位点(如叔胺和羰基氧)作为Zn离子的供电子成核位点,促进了紧密成核.这些超分子与Zn离子之间的强烈相互作用,不仅提高了系统的稳定性,还显著抑制了不良副反应.因此,我们组装的对称电池和Zn//V_(2)O_(5)全电池均展示了长效的循环稳定性和卓越的库仑效率.

关键词： CBsupermolecules molecular channel lone-pair electrons interface chemical environment regulation Zn ion battery

Hybridization chain reaction-based DNA nanomaterials for biosensing,bioimaging and therapeutics

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Chinese Chemical Letters 2024年第2期35卷 223-231页

作者： Zhaoyue Lv Mengxue Huang Peiran Li Mengdi Xu Chi Yao Dayong Yang Frontiers Science Center for Synthetic Biology Key Laboratory of Systems Bioengineering (MOE)Institute of Biomolecular and Biomedical EngineeringSchool of Chemical Engineering and TechnologyTianjin UniversityTianjin 300350China Zhejiang institute of Tianjin university Ningbo 315201China

DNA nanomaterials hold great promise in biomedical fields due to its excellent sequence programmability,molecular recognition ability and *** chain reaction(HCR)is a simple and efficient isothermal enzyme-free amplification strategy of DNA,generating nicked double helices with repeated *** the design of HCR hairpins,multiple nanomaterials with desired functions are assembled by DNA,exhibiting great potential in biomedical ***,the recent progress of HCR-based DNA nanomaterials for biosensing,bioimaging and therapeutics are *** works are exemplified to demonstrate how HCR-based DNA nanomaterials are designed and *** challenges and prospects of the development of HCR-based DNA nanomaterials are *** envision that rationally designing HCR-based DNA nanomaterials will facilitate the development of biomedical applications.

关键词： DNA nanotechnology Hybridization chain reaction DNA nanomaterials Biosensing Bioimaging Therapeutics