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Published on: October 9, 2012
Origin of spurious intensity in vacuum near sample edge in bright field TEM images
Misa Hayashida1, Marek Malac2, Jun Yamasaki3
1NRC-NANO, National Research Council, Edmonton, Alberta T6G 2M9, Canada.
Abstract:
Bright-field transmission electron microscope (BFTEM) images exhibit spurious image intensity in the vacuum near the sample edge. The spurious intensity gradually decreases with increasing distance from the sample edge. By taking into account angular and energy loss distribution of the scattered electrons and lens aberrations, the origin of the spurious intensity of BFTEM images can be explained. The spurious intensity extent and magnitude can be significantly reduced by using either electron energy filtering or a small collection semiangle.
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