MRI: Acquisition of a Field Emission Transmission Electron Microscope to Enable Multidisciplinary Materials Research, Education and Outreach, in Detroit

MRI：在底特律购买场发射透射电子显微镜以实现多学科材料研究、教育和推广

• 批准号: 2018587
• 负责人: Stephanie Brock
• 金额: $ 98万
• 依托单位: Wayne State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2020
• 资助国家: 美国
• 起止时间: 2020-09-01 至 2022-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2018587&HistoricalAwards=false
• 关键词: MRI; Acquisition; Field; Emission; Transmission

This Major Research Instrumentation (MRI) award supports the acquisition of a high-resolution electron microscope at Wayne State University (WSU) capable of chemical and structural mapping on the nanoscale to advance research being performed by 23 different investigators in the fields of energy conversion/storage, catalysis, microelectronics/sensing, and biomedical sciences. Technological advances arise from the capability of the instrument to provide sub-nanometer imaging and chemical resolution correlated to localized structure. Additionally, the ease-of-use afforded by automated settings and drift correction enables rapid collection of high-quality data (high throughput), even by novice users. The MRI award contributes to the success of WSU’s diverse student body and enhances the urban Detroit community through training of students in modern microscopy and the provision of hands-on educational activities for underserved K-12 students in the city (80% African American). The electron microscope is managed by the Lumigen Instrument Center core facility with a dedicated microscopist on-staff, enabling research activities and the training of students at six regional academic institutions (five of which are primarily undergraduate institutions) while advancing product and technology development at both start-up and established companies.This MRI Award supports the acquisition of a Field-Emission Scanning Transmission Electron Microscope (S/TEM) with multiple energy dispersive spectrometers (EDS) and a High Angle Annular Dark Field detector. The S/TEM provides: 1) fast and precise EDS chemical composition mapping and line scanning with spot sizes as low as 0.3 nm and the capability to detect trace elemental components (0.1 wt.%); 2) Z-contrast imaging capabilities at 0.16 nm resolution for chemical distribution analysis; 3) a large-field, high-speed camera for fast data acquisition; 4) nanobeam diffraction for localized (single particle) structure evaluation; 5) sample drift correction for high-resolution imaging; and 6) remote data acquisition for off-site users. The S/TEM supports research activities focused on (1) the development of doped nanomaterials for high-efficiency magnetic refrigeration; (2) establishment of new high energy-density Li-ion battery technologies; (3) design of electrocatalysts for selective biomass conversion and water splitting (hydrogen generation); (4) fabrication of up-converting nanoparticles for biophotonics/imaging; (5) creation of high-sensitivity chemical sensing platforms for environmental analysis, and (5) Atomic Layer Deposition (ALD) of electropositive metal films for microelectronics.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

这项重大研究仪器 (MRI) 奖项支持韦恩州立大学 (WSU) 购买一台高分辨率电子显微镜，该显微镜能够在纳米尺度上进行化学和结构绘图，以推进 23 名不同研究人员在能量转换/存储、催化、微电子/传感和生物医学领域正在进行的研究。技术进步源于仪器提供亚纳米成像和与局部结构相关的化学分辨率的能力。此外，自动化设置和漂移校正带来的易用性使得即使是新手用户也能快速收集高质量数据（高吞吐量）。 MRI 奖有助于 WSU 多元化学生群体的成功，并通过对学生进行现代显微镜培训以及为该市服务不足的 K-12 学生（80% 非裔美国人）提供实践教育活动来增强底特律城市社区。该电子显微镜由 Lumigen 仪器中心核心设施管理，配备一名专门的显微镜师，支持六个地区学术机构（其中五个主要是本科机构）的研究活动和学生培训，同时促进初创公司和老牌公司的产品和技术开发。该 MRI 奖支持购买具有多个能量色散的场发射扫描透射电子显微镜 (S/TEM) 光谱仪 (EDS) 和高角度环形暗场探测器。 S/TEM 提供：1) 快速、精确的 EDS 化学成分测绘和线扫描，光斑尺寸低至 0.3 nm，并能够检测痕量元素成分 (0.1 wt.%)； 2) 0.16 nm 分辨率的 Z 对比度成像能力，用于化学分布分析； 3）大视场、高速相机，用于快速数据采集； 4) 用于局部（单颗粒）结构评估的纳米束衍射； 5) 高分辨率成像的样品漂移校正； 6) 异地用户的远程数据采集。 S/TEM 支持的研究活动集中在 (1) 开发用于高效磁制冷的掺杂纳米材料； （2）建立新型高能量密度锂离子电池技术； （3）选择性生物质转化和水分解（制氢）电催化剂的设计； (4) 用于生物光子学/成像的上转换纳米粒子的制造； (5) 创建用于环境分析的高灵敏度化学传感平台，以及 (5) 用于微电子学的正电金属薄膜的原子层沉积 (ALD)。该奖项反映了 NSF 的法定使命，并通过使用基金会的智力优势和更广泛的影响审查标准进行评估，被认为值得支持。