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Atomic Resolution Imaging of Light Elements in a Crystalline Environment using Dynamic Hollow-Cone Illumination Transmission Electron Microscopy

Published online by Cambridge University Press:  10 June 2020

Hamish G. Brown Open the ORCID record for Hamish G. Brown [Opens in a new window]  and
Jim Ciston
Hamish G. Brown*
Affiliation:
National Center for Electron Microscopy, Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, CA, USA
Jim Ciston
Affiliation:
National Center for Electron Microscopy, Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, CA, USA
*
*Author for correspondence: Hamish G. Brown, E-mail: [email protected]
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Abstract

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 TEM is challenging in practice due to sensitivity to the misalignment of the precession axis, microscope objective aperture, and crystal zone axis.

Keywords

annular bright field (ABF)electron beam precessionlight atom imagingtransmission electron microscopy
Type
Software and Instrumentation
Information
Microscopy and Microanalysis , Volume 26 , Issue 4 , August 2020 , pp. 623 - 629
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Copyright
Copyright © Microscopy Society of America 2020

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