New EDS detector for Ultrahigh-resolution TEM

我们要求为6年前麦克马斯特大学购买的我们的超高分辨率透射电子显微镜(UHR-TEM)升级能量色散X射线能谱(EDS)探测器。这种分析附件比以前的探测器提供了更高的探测器效率和更快的电子学，它建立在20年前的技术基础上，对于能够分析透射电子显微镜表征的样品的化学成分是必不可少的。更大的探测器(效率高4倍)对于检测更小的结构的组成是必不可少的，例如尺寸小到1-2 nm的纳米颗粒、光束敏感材料(如腐蚀产物、含锂材料和生物材料)，并由于改进了对X射线的检测和更快的电子设备，允许进行更大规模的分析。这些特性最终将使EDS断层扫描成为可能，这是加拿大的第一次。该工具包括元素测绘和量化软件，对于确定需要分析的阶段、绘制感兴趣地区的元素分布图以便能够确定需要研究的具体领域是必不可少的。几个研究小组将从所要求的仪器中受益。项目包括汽车和核应用中的腐蚀和氧化分析、光伏材料、生物材料中的界面、燃料电池、锂离子电池材料、电池材料中的涂层和发光二极管。如果没有这一要求的工具，这项研究和在许多研究项目中的进展将受到严重限制，研究小组将在国际上失去竞争力，因为这种工具目前在加拿大以外普遍可用。

We are requesting an upgrade to energy dispersive X-ray spectrometry (EDS) detector for our ultrahigh resolution Transmission Electron Microscope (UHR-TEM) purchased by McMaster University 6 years ago. This analytical attachment provides much larger detector efficiency and faster electronics than the previous detector, built on 20-year old technology, and is essential to enable the analysis of the chemical composition of samples characterized in the TEM. The much larger detector (4 times more efficient) is essential to detect the composition of smaller structures such as nanoparticles down to 1-2nm size, beam sensitive materials (such as corrosion products, Li-containing materials and biological materials) and allows much larger scale analyses due to the improved detection of X-rays and faster electronics. These characteristics will finally make EDS tomography possible, the first time in Canada. The tool, which includes software for elemental mapping and quantification, is indispensable for the identification of phases that need to be analysed, map the distribution of elements in the areas of interest so that specific areas that need to be studied can be identified. Several research groups will benefit from the requested instrument. Projects include the analysis of corrosion and oxidation in automotive and nuclear applications, photovoltaic materials, interfaces in biomaterials, fuel cells, Li-ion battery materials, coatings in battery materials, and light-emitting diodes. Without this requested instrument, this research and progress in numerous research projects will be severely limited and the research groups will not be competitive at the international level since this tool is now commonly available outside Canada.