Microanalysis at atomic resolution Page: 2 of 31
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Microanalysis at Atomic Resolution
S. J. Pennycook, D. E. Jesson, N. D. Browning* and M. F. Chisholm
Solid State Division, Oak Ridge National Laboratory, P.O. Box 2008, Oak
Ridge, TN 37831-6030
Abstract
In this paper we discuss how the dedicated scanning transmission electron
microscope can provide a microanalysis of crystalline materials at atomic
resolution. The method requires the establishment of incoherent conditions
for a reference imaging signal as well as the spectroscopic signal. The image
can then be used to focus and locate the probe to atomic precision for
microanalysis. The Z-contrast image provides the most convenient
incoherent reference image, and X-ray and electron energy loss data may be
acquired simultaneously. In zone axis crystals, strong columnar channelling
delays the onset of beam broadening for several hundred Angstroms, so that
atomic resolution microanalysis may be achieved in materials specimens of
significant thickness. This combination of signals provides a powerful means
for studying interface structure and bonding, and avoids relying on
preconceived model structures. DISCLAIMER
This report was prepared as an account of work sponsored by an agency of the United States
Government. Neither the United States Government nor any agency thereof, nor any of their
employees, makes any warranty, express or implied, or assumes any legal liability or responsi-
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and opinions of authors expressed herein do not necessarily state or reflect those of the
United States Government or any agency thereof.
* Present address: Department of Physics (M/C 273), University of Illinois at
Chicago, 845 West Taylor Street, Chicago, IL 60607-7059. USA
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Pennycook, S. J.; Jesson, D. E.; Browning, N. D. & Chisholm, M. F. Microanalysis at atomic resolution, report, June 1, 1995; Tennessee. (https://digital.library.unt.edu/ark:/67531/metadc739863/m1/2/: accessed April 23, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.