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Shape control of size-selected naked platinum nanocrystals

Controlled growth of far-from-equilibrium-shaped nanoparticles with size selection is essential for the exploration of their unique physical and chemical properties. Shape control by wet-chemistry preparation methods produces surfactant-covered surfaces with limited understanding due to the complexi...

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Autores principales: Xia, Yu, Nelli, Diana, Ferrando, Riccardo, Yuan, Jun, Li, Z. Y.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8139959/
https://www.ncbi.nlm.nih.gov/pubmed/34021147
http://dx.doi.org/10.1038/s41467-021-23305-7
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author Xia, Yu
Nelli, Diana
Ferrando, Riccardo
Yuan, Jun
Li, Z. Y.
author_facet Xia, Yu
Nelli, Diana
Ferrando, Riccardo
Yuan, Jun
Li, Z. Y.
author_sort Xia, Yu
collection PubMed
description Controlled growth of far-from-equilibrium-shaped nanoparticles with size selection is essential for the exploration of their unique physical and chemical properties. Shape control by wet-chemistry preparation methods produces surfactant-covered surfaces with limited understanding due to the complexity of the processes involved. Here, we report the controlled production and transformation of octahedra to tetrahedra of size-selected platinum nanocrystals with clean surfaces in an inert gas environment. Molecular dynamics simulations of the growth reveal the key symmetry-breaking atomic mechanism for this autocatalytic shape transformation, confirming the experimental conditions required. In-situ heating experiments demonstrate the relative stability of both octahedral and tetrahedral Pt nanocrystals at least up to 700 °C and that the extended surface diffusion at higher temperature transforms the nanocrystals into equilibrium shape.
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spelling pubmed-81399592021-06-03 Shape control of size-selected naked platinum nanocrystals Xia, Yu Nelli, Diana Ferrando, Riccardo Yuan, Jun Li, Z. Y. Nat Commun Article Controlled growth of far-from-equilibrium-shaped nanoparticles with size selection is essential for the exploration of their unique physical and chemical properties. Shape control by wet-chemistry preparation methods produces surfactant-covered surfaces with limited understanding due to the complexity of the processes involved. Here, we report the controlled production and transformation of octahedra to tetrahedra of size-selected platinum nanocrystals with clean surfaces in an inert gas environment. Molecular dynamics simulations of the growth reveal the key symmetry-breaking atomic mechanism for this autocatalytic shape transformation, confirming the experimental conditions required. In-situ heating experiments demonstrate the relative stability of both octahedral and tetrahedral Pt nanocrystals at least up to 700 °C and that the extended surface diffusion at higher temperature transforms the nanocrystals into equilibrium shape. Nature Publishing Group UK 2021-05-21 /pmc/articles/PMC8139959/ /pubmed/34021147 http://dx.doi.org/10.1038/s41467-021-23305-7 Text en © The Author(s) 2021 https://creativecommons.org/licenses/by/4.0/Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) .
spellingShingle Article
Xia, Yu
Nelli, Diana
Ferrando, Riccardo
Yuan, Jun
Li, Z. Y.
Shape control of size-selected naked platinum nanocrystals
title Shape control of size-selected naked platinum nanocrystals
title_full Shape control of size-selected naked platinum nanocrystals
title_fullStr Shape control of size-selected naked platinum nanocrystals
title_full_unstemmed Shape control of size-selected naked platinum nanocrystals
title_short Shape control of size-selected naked platinum nanocrystals
title_sort shape control of size-selected naked platinum nanocrystals
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8139959/
https://www.ncbi.nlm.nih.gov/pubmed/34021147
http://dx.doi.org/10.1038/s41467-021-23305-7
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