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Fast coalescence of metallic glass nanoparticles
The coarsening of crystalline nanoparticles, driven by reduction of surface energy, is the main factor behind the degeneration of their physical and chemical properties. The kinetic phenomenon has been well described by various models, such as Ostwald ripening and coalescence. However, the coarsenin...
Autores principales: | , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group UK
2019
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6868181/ https://www.ncbi.nlm.nih.gov/pubmed/31748516 http://dx.doi.org/10.1038/s41467-019-13054-z |
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author | Tian, Yuan Jiao, Wei Liu, Pan Song, Shuangxi Lu, Zhen Hirata, Akihiko Chen, Mingwei |
author_facet | Tian, Yuan Jiao, Wei Liu, Pan Song, Shuangxi Lu, Zhen Hirata, Akihiko Chen, Mingwei |
author_sort | Tian, Yuan |
collection | PubMed |
description | The coarsening of crystalline nanoparticles, driven by reduction of surface energy, is the main factor behind the degeneration of their physical and chemical properties. The kinetic phenomenon has been well described by various models, such as Ostwald ripening and coalescence. However, the coarsening mechanisms of metallic glass nanoparticles (MGNs) remains largely unknown. Here we report atomic-scale observations on the coarsening kinetics of MGNs at high temperatures by in situ heating high-resolution transmission electron microscopy. The coarsening of the amorphous nanoparticles takes place by fast coalescence which is dominated by facet-free surface diffusion at a lower onset temperature. Atomic-scale observations and kinetic Monte Carlo simulations suggest that the high surface mobility and the structural isotropy of MGNs, originating from the disordered structure and unique supercooled liquid state, promote the fast coalescence of the amorphous nanoparticles at relatively lower temperatures. |
format | Online Article Text |
id | pubmed-6868181 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2019 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-68681812019-11-22 Fast coalescence of metallic glass nanoparticles Tian, Yuan Jiao, Wei Liu, Pan Song, Shuangxi Lu, Zhen Hirata, Akihiko Chen, Mingwei Nat Commun Article The coarsening of crystalline nanoparticles, driven by reduction of surface energy, is the main factor behind the degeneration of their physical and chemical properties. The kinetic phenomenon has been well described by various models, such as Ostwald ripening and coalescence. However, the coarsening mechanisms of metallic glass nanoparticles (MGNs) remains largely unknown. Here we report atomic-scale observations on the coarsening kinetics of MGNs at high temperatures by in situ heating high-resolution transmission electron microscopy. The coarsening of the amorphous nanoparticles takes place by fast coalescence which is dominated by facet-free surface diffusion at a lower onset temperature. Atomic-scale observations and kinetic Monte Carlo simulations suggest that the high surface mobility and the structural isotropy of MGNs, originating from the disordered structure and unique supercooled liquid state, promote the fast coalescence of the amorphous nanoparticles at relatively lower temperatures. Nature Publishing Group UK 2019-11-20 /pmc/articles/PMC6868181/ /pubmed/31748516 http://dx.doi.org/10.1038/s41467-019-13054-z Text en © The Author(s) 2019 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/. |
spellingShingle | Article Tian, Yuan Jiao, Wei Liu, Pan Song, Shuangxi Lu, Zhen Hirata, Akihiko Chen, Mingwei Fast coalescence of metallic glass nanoparticles |
title | Fast coalescence of metallic glass nanoparticles |
title_full | Fast coalescence of metallic glass nanoparticles |
title_fullStr | Fast coalescence of metallic glass nanoparticles |
title_full_unstemmed | Fast coalescence of metallic glass nanoparticles |
title_short | Fast coalescence of metallic glass nanoparticles |
title_sort | fast coalescence of metallic glass nanoparticles |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6868181/ https://www.ncbi.nlm.nih.gov/pubmed/31748516 http://dx.doi.org/10.1038/s41467-019-13054-z |
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