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Investigation on the fabrication of the 3rd harmonic superconducting cavity for the SSRF storage ring

Chinese Physics C 2009年第9期33卷 792-797页

作者：马震宇马广明于海波毛冬青封自强侯洪涛刘建飞 Shanghai Institute of Applied Physics CAS Graduate University of Chinese Academy of Sciences Shanghai Key Lab of Cryogenics & Superconducting RF technology

A third harmonic superconducting niobium cavity has been proposed for installation in the Shanghai Synchrotron Radiation Facility （SSRF） storage ring to improve the Touschek lifetime. In order to investigate the feasibility of the superconducting cavity fabrication indigenously and the possibility to master the fabrica tion techniques, cavities were fabricated from copper and niobium sheets by deep drawing and electron-beam welding, and a series of measurements, such as resonant frequency, shape dimensions and wall thickness, were carried out during this process. After analysis of various problems existing in the fabrication process, technique improvements were proposed, and finally the precise shape as designed and resonant frequency within 1.2 MHz were achieved for the new completed cavities. In addition, full annealing was finally proved to be a good cure for niobium sheets＇ tearing up during deep drawing. By fabricating niobium cavities successfully, some problems to the next step were cleared. This paper introduces the process of cavity fabrication and its technique improvements towards forming, and the initial vertical test result of niobium cavity is also presented.

关键词： SSRF higher harmonic cavity superconducting radio frequency fabrication technology

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PLGA-based implants for sustained delivery of peptides/proteins:Current status,challenge and perspectives

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Chinese Chemical Letters 2023年第11期34卷 41-51页

作者： Fangfei Hu Jianping Qi Yi Lu Haisheng He Wei Wu Key Laboratory of Smart Drug Delivery of MOE School of PharmacyFudan UniversityShanghai 201203China Shanghai Skin Disease Hospital Tongji University School of MedicineShanghai 200443China Fudan Zhangjiang Institute Shanghai 201203China Center for Medical Research and Innovation Shanghai Pudong HospitalFudan University Pudong Medical CenterShanghai 201399China

Peptide and protein drugs with therapeutic effects suffer from their short half-life and low stability,albeit their high efficiency and *** overcome these demerits,long-acting drug delivery systems have been developed,wherein poly(lactic-co-glycolic acid)(PLGA)implants are most preferred owing to their excellent biodegradability and *** of PLGA based products have been approved since1986,when the first product,named Decapeptyl R,successfully marched into *** meet the increasing demand for delivering various peptides and proteins,different kinds of technologies have been developed for lab-scale fabrication or industrial *** review aims to introduce recent advances of PLGA implants,and give a brief summary of fundamental properties of PLGA,fabrication technologies of peptides/proteins-loaded PLGA implants as well as factors influencing the drug release ***,challenges and future perspectives are also highlighted.

关键词： PLGA Implant Peptide/protein delivery fabrication technology Drug release

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Wafer-scale engineering of two-dimensional transition metal dichalcogenides

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Chip 2023年第3期2卷 53-66页

作者： Xiang Lan Yingliang Cheng Xiangdong Yang Zhengwei Zhang Hunan Key Laboratory of Nanophotonics and Devices School of Physics and ElectronicsCentral South UniversityChangsha 410083China College of Ma-terials Science and Engineering Hunan UniversityChangsha 410083China Institute of Micro/Nano Materials and Devices Ningbo University of TechnologyNingbo 315211China

Moore’s Law has been the driving force behind the semiconductor in-dustry for several decades,but as silicon-based transistors approach their physical limits,researchers are searching for new materials to sustain this exponential ***-dimensional transition metal dichalcogenides(TMDs),with their atomically thin structure and en-ticing physical properties,have emerged as the most promising can-didates for downsizing and improving device ***-ened by the direction of achieving large-area and high-quality TMDs growth,wafer-scale TMDs growth strategies have been continuously developed,suggesting that TMDs are poised to become a new plat-form for next-generation electronic *** this review,advanced synthesis routes and inherent properties of wafer-scale TMDs were critically *** addition,the performance in electronic devices was also discussed,providing an outlook on the opportunities and challenges that lie ahead in their development.

关键词： Wafer-scale fabrication technology Transition metal dichalcogenides Electronic devices

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Review of Fiber-Optic Localized Surface Plasmon Resonance Sensors:Geometries,fabrication Technologies,and Bio-Applications

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Photonic Sensors 2024年第2期14卷 31-56页

作者： Mengdi LU Chen WANG Ruizhi FAN Ming LIN Jianye GUANG Wei PENG Affiliated Cancer Hospital Dalian University of TechnologyShenyang 110042China School of Physics Dalian University of TechnologyDalian 116024China

Localized surface plasmon resonance(LSPR)biosensors,which enable nanoscale confinement and manipulation of light,offer the enhanced sensitivity and electromagnetic energy *** integration of LSPR with the fiber-optic technology has led to the development of compact and versatile sensors for miniaturization and remote *** comprehensive review explores various sensor configurations,fiber types,and geometric shapes,highlighting their benefits in terms of sensitivity,integration,and performance *** techniques such as focused non-chemical bonding strategies and self-assembly of nanoparticles are discussed,providing control over nanostructure morphology and enhancing sensor ***-applications of fiber-optic LSPR(FOLSPR)sensors are detailed,specifically in biomolecular interactions and analysis of proteins,pathogens and cells,nucleic acids(DNA and RNA),and other small molecules(organic compounds and heavy metal ions).Surface modification and detection schemes are emphasized for their potential for label-free and real-time *** challenges and prospects of FOLSPR sensors are addressed,including the developments in sensitivity,fabrication techniques,and measurement *** with emerging technologies such as nanomaterials is highlighted as a promising direction for future ***,this review provides insights into the advancements and potential applications of FOLSPR sensors,paving the way for sensitive and versatile optical biosensing platforms in various fields.

关键词： Fiber-optic localized surface plasmon resonance biosensor nanoparticles geometric configuration fabrication technology

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Effect of Rare Earths on Microstructure and Properties of Sn2.0Ag0.7CuRE Solder Alloy for Surface Mount technology

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Journal of Rare Earths 2005年第4期23卷 I0009-I0009页

作者： Cheng Guanghui Zhang Keke Man Hua Yang Jie Liu Yamin Yu Yangchun School of Materials Science ＆ Engineering Henan University of Science ＆ Technology Luoyang 471003 China

A new type of lead-free solder alloy Sn2.0Ag0.7CuRE was fabricated under vacuum condition. The microstructure and properties of the material, such as tensile strength, elongation, melting range, conductance and spreading area were all investigated. Result shows that when the content of RE ≤ 0.1% （mass fraction）, RE distribute uniformly in the solder alloy, and the tensile strength and conductance of Sn2.0Ag0.7CuRE solder alloy are better than those of traditional Sn37Pb solder. Its elongation and spreading area are almost equal to those of Sn37Pb solder. When the content of RE reaches 0.5%, RE compounds can be easily found around the boundaries of grains and phases, and the tensile strength and elongation and spreading area of Sn2.0Ag0.7CuRE solder alloy all decrease sharply. Therefore, RE amount added to the Sn2.0Ag0.7CuRE solder alloy under 0.1% is proper.

关键词： SnAgCuRE solder alloy fabrication technology microstructure properties

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