Environmental and in-situ scanning electron microscope

环境和原位扫描电子显微镜

• 批准号: 525594585
• 金额: --
• 依托单位: Technische Universität Hamburg
• 依托单位国家: 德国
• 项目类别: Major Research Instrumentation
• 财政年份: 2023
• 资助国家: 德国
• 起止时间: 2022-12-31 至 无数据
• 项目状态: 未结题
• 来源: https://gepris.dfg.de/gepris/projekt/525594585?language=en
• 关键词: Environmental; situ; scanning; electron; microscope

The direction of the Hamburg University of Technology towards becoming a sustainable institution with research excellence has significantly defined the new research structure with five strategic research fields. Several of these fields, e.g. "Advanced Materials & (Bio-) Processes" and "Environmental & Energy Systems" are directly reflected in the currently planned large-scale research projects, the Collaborative Research Center 1615 "Smart Reactors", the Federal Cluster of Excellence "BlueMat: Water-Driven Materials" and the extension of the Research Training Group 2462 "Processes in Natural and Engineered Particle-Fluid Systems". These projects and those described in this proposal rely on the analysis of sample systems in environments with dynamically changing parameters. Key requirements of these projects for sample investigations at the microscopic level include, in addition to humid environments, oxidizing and reducing conditions at temperatures ranging from -20 °C to 1400 °C. To ensure such investigations, an environmental and in-situ scanning electron microscope is required. Especially the possibility to perform temperature- and gas-controlled experiments of electron-transparent samples with a structural resolution of a few nanometers in scanning transmission mode by means of a field emission cathode and a special holder is a necessary condition for the analysis of nanoporous systems, such as aerogels. Also, wetting studies of electron-transparent building material or nanoporous silicon samples are only possible with scanning transmission mode in an environmental and in-situ scanning electron microscope and are not feasible with, for example, in-situ liquid holders for transmission electron microscopes. Additionally, to achieve an improved image quality even under high temperatures and partial pressures, imaging by means of absorbed electron beam current is necessary. A mass spectrometer is intended as an important component for constant monitoring of the gas environment. The Electron Microscopy Unit is the user-based equipment center for electron microscopy at Hamburg University of Technology. The continuous modernization of the Electron Microscopy Unit since 2011 with powerful electron microscopes as well as equipment for sample preparation and tomography was a key prerequisite to enable competitive research, e.g. for the Collaborative Research Center 986. Numerous current and future research projects in materials science, process engineering and building materials technology are based on high-performance electron microscopy in the form of individual or joint projects. With the environmental and in-situ scanning electron microscope applied for here, it will be possible to carry out the planned research projects that rely on the analysis of sample systems in changing environmental conditions.

汉堡工业大学致力于成为一所具有卓越研究能力的可持续发展机构，这一方向明确了新的研究结构，其中包括“先进材料与（生物）工艺”和“环境与能源”等五个战略研究领域。 “系统”直接体现在目前规划的大型研究项目中，合作研究中心1615“智能反应堆”、联邦卓越集群“BlueMat：水驱动材料”和研究培训组 2462“自然和工程粒子流体系统中的过程”的扩展 这些项目以及本提案中描述的项目依赖于对参数动态变化的环境中的样本系统进行分析，这些项目对样本研究的关键要求。微观层面除了潮湿环境外，还包括 -20 °C 至 1400 °C 温度范围内的氧化和还原条件。为了确保此类研究，特别需要环境和原位扫描电子显微镜。通过场发射阴极和特殊支架，以扫描传输模式对结构分辨率为几纳米的电子透明样品进行温度和气体控制实验的可能性是分析纳米多孔系统的必要条件，此外，电子透明建筑材料或纳米多孔硅样品的润湿研究只能在环境和原位扫描电子显微镜中使用扫描透射模式，并且对于例如用于原位液体保持器的情况是不可行的。此外，为了即使在高温和分压下也能获得改进的图像质量，需要使用质谱仪作为持续监测气体环境的重要组件。显微镜单元是汉堡工业大学基于用户的电子显微镜设备中心，自 2011 年以来，电子显微镜单元不断现代化，配备了强大的电子显微镜以及样品制备和断层扫描设备。实现竞争性研究的先决条件，例如合作研究中心 986。材料科学、工艺工程和建筑材料技术领域的许多当前和未来的研究项目都是以单独或联合项目的形式基于高性能电子显微镜。和这里应用的原位扫描电子显微镜，将有可能开展依赖于不断变化的环境条件下的样品系统分析的计划研究项目。