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@ARTICLE{Fatermans:893893,
author = {Fatermans, J. and den Dekker, A. J. and Müller-Caspary, K.
and Gauquelin, N. and Verbeeck, J. and Van Aert, S.},
title = {{A}tom column detection from simultaneously acquired {ABF}
and {ADF} {STEM} images},
journal = {Ultramicroscopy},
volume = {219},
issn = {0304-3991},
address = {Amsterdam},
publisher = {Elsevier Science},
reportid = {FZJ-2021-02905},
pages = {113046 -},
year = {2020},
abstract = {In electron microscopy, the maximum a posteriori (MAP)
probability rule has been introduced as a tool to determine
the most probable atomic structure from high-resolution
annular dark-field (ADF) scanning transmission electron
microscopy (STEM) images exhibiting low contrast-to-noise
ratio (CNR). Besides ADF imaging, STEM can also be applied
in the annular bright-field (ABF) regime. The ABF STEM mode
allows to directly visualize light-element atomic columns in
the presence of heavy columns. Typically, light-element
nanomaterials are sensitive to the electron beam, limiting
the incoming electron dose in order to avoid beam damage and
leading to images exhibiting low CNR. Therefore, it is of
interest to apply the MAP probability rule not only to ADF
STEM images, but to ABF STEM images as well. In this work,
the methodology of the MAP rule, which combines statistical
parameter estimation theory and model-order selection, is
extended to be applied to simultaneously acquired ABF and
ADF STEM images. For this, an extension of the commonly used
parametric models in STEM is proposed. Hereby, the effect of
specimen tilt has been taken into account, since small tilts
from the crystal zone axis affect, especially, ABF STEM
intensities. Using simulations as well as experimental data,
it is shown that the proposed methodology can be
successfully used to detect light elements in the presence
of heavy elements.},
cin = {ER-C-1},
ddc = {570},
cid = {I:(DE-Juel1)ER-C-1-20170209},
pnm = {5351 - Platform for Correlative, In Situ and Operando
Characterization (POF4-535) / moreSTEM - Momentum-resolved
Scanning Transmission Electron Microscopy (VH-NG-1317)},
pid = {G:(DE-HGF)POF4-5351 / G:(DE-HGF)VH-NG-1317},
typ = {PUB:(DE-HGF)16},
pubmed = {32927326},
UT = {WOS:000594768500005},
doi = {10.1016/j.ultramic.2020.113046},
url = {https://juser.fz-juelich.de/record/893893},
}