MRI: Acquisition of a Variable-Pressure, Field-Emission Scanning Electron Microscope for Materials Research and Education

非技术性说明：在支持购置一台变压场发射扫描电子显微镜方面，该项目使佛蒙特州和北方纽约的研究人员和教育工作者能够探索纳米尺度的材料。跨越物理、化学、工程、材料科学和地质学的研究项目依赖于该仪器进行分析和表征，识别元素组成和局部晶体结构。远程操作功能允许该地区的教室和博物馆进行现场实验和演示。这台现代化的仪器功能广泛，是本地大学和工业界的核心研究基础设施。技术说明：扫描电子显微镜配备了二次电子、五段背散射电子、电子背散射衍射和能量色散谱检测器。结合可变压力和低电压操作模式，这些探测器允许在1.2 nm的空间分辨率精细样品的地形，成分和晶体学表征。该仪器使研究项目能够探索纳米多孔氧化物结构、有机晶体、光电器件、滤光器、金属纳米线、地壳过程流变学和矿物风化。该奖项反映了NSF的法定使命，并通过使用基金会的知识价值和更广泛的影响审查标准进行评估，被认为值得支持。

Non-Technical Description:In supporting the acquisition of a variable-pressure, field-emission scanning electron microscope, this project enables researchers and educators in Vermont and northern New York to explore materials at the nanometer scale. Research projects spanning physics, chemistry, engineering, materials science, and geology rely on the instrument for analysis and characterization, identifying elemental composition and local crystal structure. Remote operating capabilities allow classrooms and museums in the region to perform live experiments and demonstrations. The modern instrument, with its wide-ranging capabilities, serves as a core research infrastructure for local universities and industries alike.Technical Description:The scanning electron microscope is equipped with secondary electron, five-segment back-scattered electron, electron backscatter diffraction, and energy dispersive spectroscopy detectors. Combined with variable-pressure and low-voltage operating modes, these detectors allow for topographic, compositional, and crystallographic characterization of delicate samples at spatial resolution of 1.2 nm. The instrument enables research projects exploring nanoporous oxide structures, organic crystals, optoelectronic devices, optical filters, metal nanowires, rheology of crustal processes, and mineral weathering.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.