Reconstruction and visualization of nanoparticle composites by transmission electron tomography

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DOIResolve DOI: http://doi.org/10.1016/j.ultramic.2011.11.001
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TypeArticle
Journal titleUltramicroscopy
Volume113
IssueFebruary
Pages96105; # of pages: 10
Subjectfiltered back projection; scanning transmission electron microscope; simultaneous iterative reconstruction technique; thresholding; transmission electron microscopy; transmission electron tomography; volumetric measurements; tomography; nanocrystals; nanocomposites; segmentation; reconstruction
AbstractThis paper examines the limits of transmission electron tomography reconstruction methods for a nanocomposite object composed of many closely packed nanoparticles. Two commonly used reconstruction methods in TEM tomography were examined and compared, and the sources of various artefacts were explored. Common visualization methods were investigated, and the resulting “interpretation artefacts” ( i.e., deviations from “actual” particle sizes and shapes arising from the visualization) were determined. Setting a known or estimated nanoparticle volume fraction as a criterion for thresholding does not in fact give a good visualization. Unexpected effects associated with common built-in image filtering methods were also found. Ultimately, this work set out to establish the common problems and pitfalls associated with electron beam tomographic reconstruction and visualization of samples consisting of closely spaced nanoparticles
Publication date
PublisherElsevier
LanguageEnglish
AffiliationNational Institute for Nanotechnology; National Research Council Canada
Peer reviewedYes
NPARC number19734702
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Record identifier6e7ca0cf-5c53-4c55-a362-529167ba823c
Record created2012-04-30
Record modified2016-05-09
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