Mapping the chemistry in nanostructured materials by energy-filtering transmission electron microscopy (EFTEM)

Energy-filtered transmission electron microscopy (EFTEM) can be used to acq uire elemental distribution maps at high lateral resolution within short ac quisition times, which makes it quite efficient for a detailed characteriza tion of nanostructures, as illustrated with examples concerning a nanostruc tured substituted La-based cermet compound and a nanoscale multilayer. In t he first example, we show how phases in a rapidly cooled substituted LaNi5 can be visualized by recording jump ratio images. Secondly, EFTEM was capab le of imaging individual nanoscale layers in a magnetic multilayer consisti ng of 2 nm terbium and 3 nm iron. (C) 2001 Elsevier Science B.V. All rights reserved.