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.

汉堡技术大学成为具有卓越研究的可持续机构的方向，通过五个战略研究领域，大大定义了新的研究结构。其中几个领域，例如“高级材料与（生物）过程”和“环境与能源系统”直接反映在当前计划的大规模研究项目中，协作研究中心1615“智能反应堆”，联邦卓越群体“蓝色：水驱动的材料”以及2462研究小组的扩展以及自然和工程粒子粒子 - 粒子型系统的扩展。这些项目以及本提案中描述的项目依赖于具有动态变化参数的环境中样本系统的分析。这些项目在微观水平上进行样本调查的关键要求还包括，除潮湿的环境外，在温度范围为-20°C至1400°C的温度下氧化和降低条件。为了确保此类投资，需要进行环境和原位扫描电子显微镜。尤其是通过田间发射阴极和特殊持有人在扫描传输模式下以扫描传输模式进行一些纳米的结构分辨率进行电子透明样品进行温度和气体控制的实验的可能性，这是分析纳米多孔系统的必要条件，例如气凝胶。同样，只有在环境和原位扫描电子显微镜中扫描传输模式，对电子透明建筑材料或纳米多孔硅样品的润湿研究才有可能，并且与透射电子显微镜的原地液体持有者不可行。此外，即使在高温和部分压力下，通过吸收的电子束进行成像即使在高温和部分压力下达到了改善的图像质量，质谱仪旨在作为恒定监测气体环境的重要组成部分。电子显微镜单元是汉堡技术大学电子显微镜设备中心。自2011年以来，通过强大的电子显微镜以及样品制备和层析成像的设备，电子显微镜单元的连续现代化是实现竞争性研究的关键先决条件，例如对于合作研究中心986。材料科学，工艺工程和建筑材料技术的许多当前和未来研究项目基于个人或联合项目形式的高性能电子显微镜。在此处适用环境和原位扫描电子显微镜的情况下，可以执行依靠样本系统在改变环境条件下的样本系统分析的计划研究项目。