Acquisition of Cathodoluminescence System for Scanning Electron Microscope

扫描电子显微镜阴极发光系统的购置

• 批准号: 2228482
• 负责人: Elizabeth Balgord
• 金额: $ 31.28万
• 依托单位: Weber State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2023
• 资助国家: 美国
• 起止时间: 2023-08-01 至 2024-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2228482&HistoricalAwards=false
• 关键词: Acquisition; Cathodoluminescence; System; Scanning; Electron

A new high-resolution cathode-luminescence (CL) imaging system will support the next generation of research studies at Weber State University, a primarily undergraduate institution in northern Utah. The new CL system will interface with an existing scanning electron microscope (SEM) housed in the College of Science Microscopy (COSMic) lab and promote student training in instrumentation, data science, and image processing via undergraduate research experiences and course-based projects with a focus on enhanced recruitment and retention of students from under-represented groups into the physical sciences. The system will improve the institutional research infrastructure and capabilities, supporting interdisciplinary collaborations among faculty and students in multiple science departments and with outside institutions and government agencies. Images from the SEM-CL system and research results will be disseminated to broad, diverse audiences. SEM-CL is a key micro-analytical technique to image features within a variety of materials. Projects that will utilize integrated CL imaging include: (1) geochronologic and geochemical analysis of minerals to test models of crustal evolution of Paleoproterozoic basement rocks with inherited Archean components western North America, which record a key time in Earth history marked by onset of supercontinent cycles along with the characterization of source-to-sink patterns in synorogenic strata in Cordilleran sedimentary basins, which will increase understanding of retroarc fold-thrust belt exhumation patterns and volcanic arc tempos; (2) microstructural analysis of quartz and calcite from fault/shear zones and vein systems will increase understanding of fluid pathways and fluid-rock interaction that result in hydrolytic weakening, reaction softening, grain size reduction, and concentrated deformation, which partly control overall crustal rheology; and (3) characterization of thin-film materials providing key data to understand the nature of impurities and defects that can be used to refine deposition/synthesis processes and control/passivate impurities ultimately improving the opto-electronic performance of materials.This project is jointly funded by the EAR Instrumentation and Facilities Program and Division of Earth Sciences to support projects that increase research capabilities, capacity and infrastructure at a wide variety of institution types, as outlined in the GEO EMBRACE DCL.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.

新型高分辨率阴极发光 (CL) 成像系统将支持韦伯州立大学的下一代研究，该大学是犹他州北部的一所主要本科院校。新的 CL 系统将与科学显微镜学院 (COSMic) 实验室中现有的扫描电子显微镜 (SEM) 接口，并通过本科生研究经验和基于课程的项目促进仪器、数据科学和图像处理方面的学生培训重点关注加强招收和保留来自代表性不足群体的学生进入物理科学领域。该系统将改善机构的研究基础设施和能力，支持多个科学部门的教师和学生之间以及与外部机构和政府机构的跨学科合作。 SEM-CL 系统的图像和研究结果将传播给广泛、多样化的受众。 SEM-CL 是一种关键的微观分析技术，可对各种材料的特征进行成像。将利用集成 CL 成像的项目包括：(1) 对矿物进行地质年代学和地球化学分析，以测试北美西部具有继承的太古代成分的古元古代基底岩石的地壳演化模型，这些岩石记录了地​​球历史上以超大陆循环开始为标志的关键时期以及科迪勒拉沉积盆地同造岩地层源-汇模式的表征，这将增加对弧后褶皱逆冲带折返模式和火山的了解弧线节奏； (2) 对来自断层/剪切带和脉系统的石英和方解石的微观结构分析将增加对流体路径和流体-岩石相互作用的理解，这些相互作用导致水解减弱、反应软化、晶粒尺寸减小和集中变形，从而部分控制整个地壳流变学； （3）薄膜材料的表征，提供关键数据以了解杂质和缺陷的性质，可用于改进沉积/合成工艺并控制/钝化杂质，最终提高材料的光电性能。该项目是联合的由 EAR 仪器和设施计划以及地球科学部资助，用于支持提高各种机构类型的研究能力、容量和基础设施的项目，如 GEO EMBRACE DCL 中所述。该奖项反映了 NSF 的法定使命，并被视为值得通过使用基金会的智力优点和更广泛的影响审查标准进行评估来支持。