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Shear displacement gradient in X-ray Bragg coherent diffractive imaging

Bragg coherent X-ray diffractive imaging is a cutting-edge method for recovering three-dimensional crystal structure with nanoscale resolution. Phase retrieval provides an atomic displacement parallel to the Bragg peak reciprocal lattice vector. The derivative of the displacement along the same vect...

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Detalles Bibliográficos
Autores principales: Gorobtsov, Oleg, Singer, Andrej
Formato: Online Artículo Texto
Lenguaje:English
Publicado: International Union of Crystallography 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9070722/
https://www.ncbi.nlm.nih.gov/pubmed/35511019
http://dx.doi.org/10.1107/S1600577522002363
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author Gorobtsov, Oleg
Singer, Andrej
author_facet Gorobtsov, Oleg
Singer, Andrej
author_sort Gorobtsov, Oleg
collection PubMed
description Bragg coherent X-ray diffractive imaging is a cutting-edge method for recovering three-dimensional crystal structure with nanoscale resolution. Phase retrieval provides an atomic displacement parallel to the Bragg peak reciprocal lattice vector. The derivative of the displacement along the same vector provides the normal strain field, which typically serves as a proxy for any structural changes. In this communication it is found that the other component of the displacement gradient, perpendicular to the reciprocal lattice vector, provides additional information from the experimental data collected from nanocrystals with mobile dislocations. Demonstration on published experimental data show how the perpendicular component of the displacement gradient adds to existing analysis, enabling an estimate for the external stresses, pinpointing the location of surface dislocations, and predicting the dislocation motion in in situ experiments.
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spelling pubmed-90707222022-05-10 Shear displacement gradient in X-ray Bragg coherent diffractive imaging Gorobtsov, Oleg Singer, Andrej J Synchrotron Radiat Short Communications Bragg coherent X-ray diffractive imaging is a cutting-edge method for recovering three-dimensional crystal structure with nanoscale resolution. Phase retrieval provides an atomic displacement parallel to the Bragg peak reciprocal lattice vector. The derivative of the displacement along the same vector provides the normal strain field, which typically serves as a proxy for any structural changes. In this communication it is found that the other component of the displacement gradient, perpendicular to the reciprocal lattice vector, provides additional information from the experimental data collected from nanocrystals with mobile dislocations. Demonstration on published experimental data show how the perpendicular component of the displacement gradient adds to existing analysis, enabling an estimate for the external stresses, pinpointing the location of surface dislocations, and predicting the dislocation motion in in situ experiments. International Union of Crystallography 2022-04-05 /pmc/articles/PMC9070722/ /pubmed/35511019 http://dx.doi.org/10.1107/S1600577522002363 Text en © Gorobtsov and Singer 2022 https://creativecommons.org/licenses/by/4.0/This is an open-access article distributed under the terms of the Creative Commons Attribution (CC-BY) Licence, which permits unrestricted use, distribution, and reproduction in any medium, provided the original authors and source are cited.
spellingShingle Short Communications
Gorobtsov, Oleg
Singer, Andrej
Shear displacement gradient in X-ray Bragg coherent diffractive imaging
title Shear displacement gradient in X-ray Bragg coherent diffractive imaging
title_full Shear displacement gradient in X-ray Bragg coherent diffractive imaging
title_fullStr Shear displacement gradient in X-ray Bragg coherent diffractive imaging
title_full_unstemmed Shear displacement gradient in X-ray Bragg coherent diffractive imaging
title_short Shear displacement gradient in X-ray Bragg coherent diffractive imaging
title_sort shear displacement gradient in x-ray bragg coherent diffractive imaging
topic Short Communications
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9070722/
https://www.ncbi.nlm.nih.gov/pubmed/35511019
http://dx.doi.org/10.1107/S1600577522002363
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