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Extracting the morphology of gold bipyramids from small-angle X-ray scattering experiments via form factor modelling
Accurate shape description is a challenge in materials science. Small-angle X-ray scattering (SAXS) can provide the shape, size and polydispersity of nanoparticles by form factor modelling. However, simple geometric models such as the ellipsoid may not be enough to describe objects with complex shap...
Autores principales: | , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
International Union of Crystallography
2023
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9901920/ https://www.ncbi.nlm.nih.gov/pubmed/36777141 http://dx.doi.org/10.1107/S1600576722011669 |
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author | Lyu, Jieli Goldmann, Claire Hamon, Cyrille Constantin, Doru |
author_facet | Lyu, Jieli Goldmann, Claire Hamon, Cyrille Constantin, Doru |
author_sort | Lyu, Jieli |
collection | PubMed |
description | Accurate shape description is a challenge in materials science. Small-angle X-ray scattering (SAXS) can provide the shape, size and polydispersity of nanoparticles by form factor modelling. However, simple geometric models such as the ellipsoid may not be enough to describe objects with complex shapes. This work shows that the form factor of gold nanobipyramids is accurately described by a truncated bicone model, which is validated by comparison with transmission electron microscopy (TEM) data for nine different synthesis batches; the average shape parameters (width, height and truncation) and the sample polydispersity are obtained. In contrast, the ellipsoid model yields worse fits of the SAXS data and exhibits systematic discrepancies with the TEM results. |
format | Online Article Text |
id | pubmed-9901920 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2023 |
publisher | International Union of Crystallography |
record_format | MEDLINE/PubMed |
spelling | pubmed-99019202023-02-10 Extracting the morphology of gold bipyramids from small-angle X-ray scattering experiments via form factor modelling Lyu, Jieli Goldmann, Claire Hamon, Cyrille Constantin, Doru J Appl Crystallogr Research Papers Accurate shape description is a challenge in materials science. Small-angle X-ray scattering (SAXS) can provide the shape, size and polydispersity of nanoparticles by form factor modelling. However, simple geometric models such as the ellipsoid may not be enough to describe objects with complex shapes. This work shows that the form factor of gold nanobipyramids is accurately described by a truncated bicone model, which is validated by comparison with transmission electron microscopy (TEM) data for nine different synthesis batches; the average shape parameters (width, height and truncation) and the sample polydispersity are obtained. In contrast, the ellipsoid model yields worse fits of the SAXS data and exhibits systematic discrepancies with the TEM results. International Union of Crystallography 2023-02-01 /pmc/articles/PMC9901920/ /pubmed/36777141 http://dx.doi.org/10.1107/S1600576722011669 Text en © Jieli Lyu et al. 2023 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 | Research Papers Lyu, Jieli Goldmann, Claire Hamon, Cyrille Constantin, Doru Extracting the morphology of gold bipyramids from small-angle X-ray scattering experiments via form factor modelling |
title | Extracting the morphology of gold bipyramids from small-angle X-ray scattering experiments via form factor modelling |
title_full | Extracting the morphology of gold bipyramids from small-angle X-ray scattering experiments via form factor modelling |
title_fullStr | Extracting the morphology of gold bipyramids from small-angle X-ray scattering experiments via form factor modelling |
title_full_unstemmed | Extracting the morphology of gold bipyramids from small-angle X-ray scattering experiments via form factor modelling |
title_short | Extracting the morphology of gold bipyramids from small-angle X-ray scattering experiments via form factor modelling |
title_sort | extracting the morphology of gold bipyramids from small-angle x-ray scattering experiments via form factor modelling |
topic | Research Papers |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9901920/ https://www.ncbi.nlm.nih.gov/pubmed/36777141 http://dx.doi.org/10.1107/S1600576722011669 |
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