Atomic Resolution Imaging of Light Elements in a Crystalline Environment using Dynamic Hollow-Cone Illumination Transmission Electron Microscopy
Hamish G Brown, Jim Ciston
MICROSCOPY AND MICROANALYSIS | CAMBRIDGE UNIV PRESS | Published : 2020
Multiple electron scattering and the nonintuitive nature of image formation with coherent radiation complicate the interpretation of conventional transmission electron microscopy images. Precession of the illuminating beam in transmission electron microscopy (TEM) can lead to more robust and interpretable images with some penalty to image contrast, a technique known as dynamic hollow-cone illumination TEM. We demonstrate direct and robust imaging of light and heavy atoms in a crystalline environment with this technique. This method is similar to the annular bright-field technique in scanning transmission electron microscopy, via the principle of reciprocity. Dynamic hollow-cone illumination ..View full abstract
Awarded by Office of Science, Office of Basic Energy Sciences, of the U.S. Department of Energy
Work at the Molecular Foundry was supported by the Office of Science, Office of Basic Energy Sciences, of the U.S. Department of Energy under Contract No. DE-AC02-05CH11231. H.G.B. and J.C. acknowledge additional support from the Presidential Early Career Award for Scientists and Engineers (PECASE) through the U.S. Department of Energy. The authors acknowledge sample preparation support from Thermo Fisher Scientific. Helpful discussions with Dr. Alex Eggeman of the University of Manchester are also acknowledged.