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The 3d Parameters Of A (Nano)Crystal From Lattice Images At Two Tilts

Published online by Cambridge University Press:  02 July 2020

Wentao Qin ,
Haresh Siriwardane  and
Phil Fraundorf
Wentao Qin
Affiliation:
Physics & Astronomy Department and CME, University of Missouri-StL, St. Louis, MO63121
Haresh Siriwardane
Affiliation:
Physics & Astronomy Department and CME, University of Missouri-StL, St. Louis, MO63121
Phil Fraundorf
Affiliation:
Physics & Astronomy Department and CME, University of Missouri-StL, St. Louis, MO63121
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Extract

Various techniques have been developed to infer the 3D relationship of reciprocal lattice vectors from electron diffraction patterns taken at different specimen orientations. Such relationship is subsequently applied in crystallographic analyses. Due to the transmitted nature of the electron beam, TEM images present 3D information averaged throughout the thickness of the specimen on each micrograph. Techniques for acquiring 3D information from such images include stereomicroscopy for characterizing irregular dislocation networks, and 3D reconstruction of nonperiodic macromolecular assemblies. Prospects for finding the 3D lattice parameters of nanocrystals from HREM images taken at different specimen orientations have been discussed. Here we apply this stereo lattice imaging to a 7 nm crystal, and discuss its application to compact fee and bec lattices in general. Results on other lattice types will be published separately.

Generally 3 non-coplanar lattice vectors seen along 2 different zone axes are sufficient for inferring a subset of the 3D reciprocal lattice of a single crystal.

Type
High Resolution Electron Microscopy
Information
Microscopy and Microanalysis , Volume 5 , Issue S2: Proceedings: Microscopy & Microanalysis '99, Microscopy Society of America 57th Annual Meeting, Microbeam Analysis Society 33rd Annual Meeting, Portland, Oregon August 1-5, 1999 , August 1999 , pp. 188 - 189
Copyright
Copyright © Microscopy Society of America

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References

References:

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5.Acknowledgements: Dr. James and Dr. Shih at U. Missouri-Rolla for the WC film, Dr. Gharabaghi of St. Louis U. for comments, a UM-StL 1998 Grad. Summer Fellowship for WQ, and EMS OnLine for Model Drawings (http://cimewww.epfl.cli/CIOL/).(http://cimewww.epfl.cli/CIOL/).http://www.nice.org.uk/page.aspx?o=43210Google Scholar