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Macroscopic nucleation phenomena in continuum media with long-range interactions

Nucleation, commonly associated with discontinuous transformations between metastable and stable phases, is crucial in fields as diverse as atmospheric science and nanoscale electronics. Traditionally, it is considered a microscopic process (at most nano-meter), implying the formation of a microscop...

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Autores principales: Nishino, Masamichi, Enachescu, Cristian, Miyashita, Seiji, Rikvold, Per Arne, Boukheddaden, Kamel, Varret, François
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group 2011
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3240980/
https://www.ncbi.nlm.nih.gov/pubmed/22355677
http://dx.doi.org/10.1038/srep00162
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author Nishino, Masamichi
Enachescu, Cristian
Miyashita, Seiji
Rikvold, Per Arne
Boukheddaden, Kamel
Varret, François
author_facet Nishino, Masamichi
Enachescu, Cristian
Miyashita, Seiji
Rikvold, Per Arne
Boukheddaden, Kamel
Varret, François
author_sort Nishino, Masamichi
collection PubMed
description Nucleation, commonly associated with discontinuous transformations between metastable and stable phases, is crucial in fields as diverse as atmospheric science and nanoscale electronics. Traditionally, it is considered a microscopic process (at most nano-meter), implying the formation of a microscopic nucleus of the stable phase. Here we show for the first time, that considering long-range interactions mediated by elastic distortions, nucleation can be a macroscopic process, with the size of the critical nucleus proportional to the total system size. This provides a new concept of “macroscopic barrier-crossing nucleation”. We demonstrate the effect in molecular dynamics simulations of a model spin-crossover system with two molecular states of different sizes, causing elastic distortions.
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spelling pubmed-32409802011-12-22 Macroscopic nucleation phenomena in continuum media with long-range interactions Nishino, Masamichi Enachescu, Cristian Miyashita, Seiji Rikvold, Per Arne Boukheddaden, Kamel Varret, François Sci Rep Article Nucleation, commonly associated with discontinuous transformations between metastable and stable phases, is crucial in fields as diverse as atmospheric science and nanoscale electronics. Traditionally, it is considered a microscopic process (at most nano-meter), implying the formation of a microscopic nucleus of the stable phase. Here we show for the first time, that considering long-range interactions mediated by elastic distortions, nucleation can be a macroscopic process, with the size of the critical nucleus proportional to the total system size. This provides a new concept of “macroscopic barrier-crossing nucleation”. We demonstrate the effect in molecular dynamics simulations of a model spin-crossover system with two molecular states of different sizes, causing elastic distortions. Nature Publishing Group 2011-11-21 /pmc/articles/PMC3240980/ /pubmed/22355677 http://dx.doi.org/10.1038/srep00162 Text en Copyright © 2011, Macmillan Publishers Limited. All rights reserved http://creativecommons.org/licenses/by-nc-sa/3.0/ This work is licensed under a Creative Commons Attribution-NonCommercial-ShareALike 3.0 Unported License. To view a copy of this license, visit http://creativecommons.org/licenses/by-nc-sa/3.0/
spellingShingle Article
Nishino, Masamichi
Enachescu, Cristian
Miyashita, Seiji
Rikvold, Per Arne
Boukheddaden, Kamel
Varret, François
Macroscopic nucleation phenomena in continuum media with long-range interactions
title Macroscopic nucleation phenomena in continuum media with long-range interactions
title_full Macroscopic nucleation phenomena in continuum media with long-range interactions
title_fullStr Macroscopic nucleation phenomena in continuum media with long-range interactions
title_full_unstemmed Macroscopic nucleation phenomena in continuum media with long-range interactions
title_short Macroscopic nucleation phenomena in continuum media with long-range interactions
title_sort macroscopic nucleation phenomena in continuum media with long-range interactions
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3240980/
https://www.ncbi.nlm.nih.gov/pubmed/22355677
http://dx.doi.org/10.1038/srep00162
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