Acquisition of High-Resolution Electron Microscopy Facilities for The Johns Hopkins University

为约翰·霍普金斯大学购置高分辨率电子显微镜设备

• 批准号: 9512438
• 负责人: David Veblen
• 金额: $ 68万
• 依托单位: Johns Hopkins University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1996
• 资助国家: 美国
• 起止时间: 1996-01-01 至 1999-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9512438&HistoricalAwards=false
• 关键词: Acquisition; Resolution; Electron; Microscopy; Facilities

9512438 Veblen This Academic Research Infrastructure grant provides $680,000 as one-half support of the costs of acquiring and installing a new high-resolution transmission electron microscope with a field emission gun (FEG-HRTEM) at The Johns Hopkins University. Matching funds will be provided through the Keck Foundation. Funding is split between the Earth Sciences Facilities and Instrumentation Program's ARI allocation and Engineering's Civil and Mechanical System's ARI allocation in amounts of $570,000 and $110,000, respectively. The need for HRTEM facilities at Johns Hopkins University extends beyond traditional departmental and divisional boundaries and includes a broad range of engineering and scientific disciplines. This microscope will be the keystone of an interdepartmental/interdivisional electron microscopy laboratory that will benefit Hopkins researchers in biomedical engineering, chemical engineering, chemistry, earth and planetary sciences, environmental engineering, materials science and engineering, mechanical engineering, and physics. Specifically, a 300 keV atomic resolution TEM with a field emission gun capable of point-to-point characterization of material at the nanoscale (0.2 nm) and equipped with a high current probe capable of extremely high resolution (~ 1 nm) chemical analyses will be acquired and installed. Development of many advanced materials and the advancement of fundamental understanding in environmental chemistry, geochemistry, and physics are occurring at nanometer or even atomic dimensions and research in these areas is highly dependent on the ability to observe and characterize solids at these length scales. Examples of specific research projects that will be conducted in the new electron microscopy facility are processing and characterization of nanoscale materials, dislocation core structures in intermetallic alloys, environmental chemistry (addressing sorption of toxic metals and other pollutants on soil minerals), development and characterization of rare-earth magnetostictive materials, nanoscale observations of porous semiconductors, the identification of failure mechanisms in materials with applications to manufacturing processes, and investigations in crystal chemistry and geochemistry. ***

小行星9512438 这项学术研究基础设施赠款提供68万美元，作为在约翰霍普金斯大学购买和安装一台新的高分辨率透射电子显微镜（FEG-HRTEM）的一半费用。 匹配资金将通过凯克基金会提供。 资金分配在地球科学设施和仪器计划的ARI分配和工程的土木和机械系统的ARI分配之间，分别为57万美元和11万美元。 约翰霍普金斯大学对HRTEM设施的需求超出了传统的部门和部门界限，包括广泛的工程和科学学科。 这种显微镜将是一个跨部门/跨部门的电子显微镜实验室，将有利于霍普金斯研究人员在生物医学工程，化学工程，化学，地球和行星科学，环境工程，材料科学与工程，机械工程和物理学的基石。 具体而言，将获得并安装300 keV原子分辨率TEM，其具有能够在纳米级（0.2 nm）下对材料进行点对点表征的场发射枪，并配备能够进行极高分辨率（~ 1 nm）化学分析的高电流探针。 许多先进材料的发展和环境化学，地球化学和物理学的基本理解的进步都发生在纳米甚至原子尺度上，这些领域的研究高度依赖于在这些长度尺度上观察和表征固体的能力。 将在新的电子显微镜设施中进行的具体研究项目的例子包括纳米材料的处理和表征、金属间合金中的位错核心结构、环境化学（解决有毒金属和其他污染物在土壤矿物上的吸附），稀土磁致伸缩材料的开发和表征，多孔半导体的纳米级观测，材料失效机制的识别及其在制造过程中的应用，以及晶体化学和地球化学的研究。 ***