Publication
Title
Quantitative composition determination at the atomic level using model-based high-angle annular dark field scanning transmission electron microscopy
Author
Abstract
High angle annular dark field scanning transmission electron microscopy (HAADF STEM) images provide sample information which is sensitive to the chemical composition. The image intensities indeed scale with the mean atomic number Z. To some extent, chemically different atomic column types can therefore be visually distinguished. However, in order to quantify the atomic column composition with high accuracy and precision, model-based methods are necessary. Therefore, an empirical incoherent parametric imaging model can be used of which the unknown parameters are determined using statistical parameter estimation theory (Van Aert et al., 2009, [1]). In this paper, it will be shown how this method can be combined with frozen lattice multislice simulations in order to evolve from a relative toward an absolute quantification of the composition of single atomic columns with mixed atom types. Furthermore, the validity of the model assumptions are explored and discussed.
Language
English
Source (journal)
Ultramicroscopy. - Amsterdam
Publication
Amsterdam : 2014
ISSN
0304-3991
Volume/pages
137(2014), p. 12-19
ISI
000331092200003
Full text (Publisher's DOI)
Full text (publisher's version - intranet only)
UAntwerpen
Faculty/Department
Research group
[E?say:metaLocaldata.cgzprojectinf]
ESTEEM 2 - Enabling science and technology through European electron microscopy.
Counting Atoms in Nanomaterials (COUNTATOMS).
Quantitative three-dimensional structure determination using transmission electron microscopy : from images toward precise three-dimensional structures of nanomaterials at atomic scale.
Quantitative electron microscopy: from experimental measurements to precise numbers.
Revealing the source of emergent properties in complex oxides via direct imaging of charge/orbital/spin ordering.
Publication type
Subject
Affiliation
Publications with a UAntwerp address
External links
Web of Science
Record
Identification
Creation 26.11.2013
Last edited 20.09.2017
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