ultra-high resolution scanning electron microscope (inc. energy-dispersive X-ray spectroscopy)

超高分辨率扫描电子显微镜（包括能量色散X射线光谱仪）

• 批准号: 450829266
• 金额: --
• 依托单位: Gottfried Wilhelm Leibniz Universität Hannover
• 依托单位国家: 德国
• 项目类别: Major Research Instrumentation
• 财政年份: 2021
• 资助国家: 德国
• 起止时间: 2020-12-31 至 无数据
• 项目状态: 未结题
• 来源: https://gepris.dfg.de/gepris/projekt/450829266?language=en
• 关键词: ultra; resolution; scanning; electron; microscope

Chemical materials science occupies a key position in the research profile of the Leibniz University in Hanover, as it is a link in almost all established focal points 'optical technologies', 'biomedical research', 'quantum optics' and 'production technology'. Recent appointments resulted in a sustainable strengthening of the chemical material science section. Compared to the past, there is now a stronger focus on soft matter, polymers, hybrid materials and colloids. The corresponding materials require a special combination of analytical methods for special characterization. Therefore, the Leibniz-University Hanover will establish a new core facility for the multi-scale analysis techniques for the chemical material science (cfMATCH). The concept of the university involves to provide researchers with a comprehensive characterization of their materials in one central laboratory. Various institutes in the school of natural sciences, the department for mathematics and physics and the faculty of engineering have declared their demand. There is also interest for such a core facility outside of the university, e.g. considering the cooperation with the Hanover Medical School.Electron microscopy (TEM and SEM) is pivotal for the analysis of chemical materials. Hence, we are planning a combined purchase of both devices for cfMATCH. Scanning electron microscopy (SEM), the subject here, is to be optimized specifically to the needs that arise for soft matter with a relatively high proportion of organic components constituents. This often results in low electrical conductivity, which is usually compensated for by sputter coating with a metallic film, but this can result in the loss of information in the case of complex materials such as hybrids. Therefore, a device should be procured that works with extremely high resolution (sub-nm range) without the need for a conductive coating and thus offers the highest performance even at very low acceleration voltages or charge energy. Because many of the relevant materials exhibit a hierarchical nanostructure and complex distribution patterns of chemical elements, great emphasis is put on enormously powerful, spatially resolved elemental analysis using energy-dispersive X-ray spectroscopy (EDX). Concrete cases for the SEM comprise the investigation of the shape of and element distribution in (doped) nanoparticles and the topology of particle-based materials prepared by the assembly of the latter, colloidal glasses and aerogels, functional gradient materials, implant surfaces, nanostructured sensor materials, mineralization processes and morphologies of crystals, thermoelectric fibers and 2-D heterostructures.

化学材料科学在汉诺威莱布尼茨大学的研究中占有关键地位，因为它是几乎所有已建立的焦点“光学技术”、“生物医学研究”、“量子光学”和“生产技术”的纽带。最近的任命使化学材料科学科得到了持续的加强。与过去相比，现在更关注软物质、聚合物、杂化材料和胶体。相应的材料需要特殊的分析方法组合来进行特殊的表征。因此，莱布尼茨-汉诺威大学将建立一个新的核心设施，用于化学材料科学的多尺度分析技术（cfMATCH）。该大学的概念包括在一个中心实验室为研究人员提供其材料的全面表征。自然科学学院、数理系和工程学院的各个研究所都提出了他们的要求。在大学之外也有这样一个核心设施的兴趣，例如考虑与汉诺威医学院的合作。电子显微镜（TEM和SEM）是化学材料分析的关键。因此，我们计划为cfMATCH合并购买这两种设备。扫描电子显微镜（SEM），这里的主题，是专门优化的需求，出现了相对较高比例的有机成分成分的软物质。这通常会导致低导电性，这通常通过金属薄膜的溅射涂层来补偿，但这可能导致复杂材料（如混合材料）的信息丢失。因此，应该采购一种器件，在不需要导电涂层的情况下以极高的分辨率（亚纳米范围）工作，从而即使在非常低的加速电压或充电能量下也能提供最高的性能。由于许多相关材料表现出分层纳米结构和化学元素的复杂分布模式，因此非常重视使用能量色散x射线光谱（EDX）进行强大的空间分辨元素分析。SEM的具体案例包括研究（掺杂）纳米颗粒的形状和元素分布，以及由纳米颗粒、胶体玻璃和气凝胶、功能梯度材料、植入物表面、纳米结构传感器材料、矿化过程和晶体形态、热电纤维和二维异质结构组装而成的颗粒基材料的拓扑结构。