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Dynamical inversion of the energy landscape promotes non-equilibrium self-assembly of binary mixtures
When driven out of equilibrium, many diverse systems can form complex spatial and dynamical patterns, even in the absence of attractive interactions. Using kinetic Monte Carlo simulations, we investigate the phase behavior of a binary system of particles of dissimilar size confined between semiflexi...
Autores principales: | , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Royal Society of Chemistry
2018
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5887813/ https://www.ncbi.nlm.nih.gov/pubmed/29675210 http://dx.doi.org/10.1039/c7sc03524a |
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author | Pestana, Luis Ruiz Minnetian, Natalie Lammers, Laura Nielsen Head-Gordon, Teresa |
author_facet | Pestana, Luis Ruiz Minnetian, Natalie Lammers, Laura Nielsen Head-Gordon, Teresa |
author_sort | Pestana, Luis Ruiz |
collection | PubMed |
description | When driven out of equilibrium, many diverse systems can form complex spatial and dynamical patterns, even in the absence of attractive interactions. Using kinetic Monte Carlo simulations, we investigate the phase behavior of a binary system of particles of dissimilar size confined between semiflexible planar surfaces, in which the nanoconfinement introduces a non-local coupling between particles, which we model as an activation energy barrier to diffusion that decreases with the local fraction of the larger particle. The system autonomously reaches a cyclical non-equilibrium state characterized by the formation and dissolution of metastable micelle-like clusters with the small particles in the core and the large ones in the surrounding corona. The power spectrum of the fluctuations in the aggregation number exhibits 1/f noise reminiscent of self-organized critical systems. We suggest that the dynamical metastability of the micellar structures arises from an inversion of the energy landscape, in which the relaxation dynamics of one of the species induces a metastable phase for the other species. |
format | Online Article Text |
id | pubmed-5887813 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2018 |
publisher | Royal Society of Chemistry |
record_format | MEDLINE/PubMed |
spelling | pubmed-58878132018-04-19 Dynamical inversion of the energy landscape promotes non-equilibrium self-assembly of binary mixtures Pestana, Luis Ruiz Minnetian, Natalie Lammers, Laura Nielsen Head-Gordon, Teresa Chem Sci Chemistry When driven out of equilibrium, many diverse systems can form complex spatial and dynamical patterns, even in the absence of attractive interactions. Using kinetic Monte Carlo simulations, we investigate the phase behavior of a binary system of particles of dissimilar size confined between semiflexible planar surfaces, in which the nanoconfinement introduces a non-local coupling between particles, which we model as an activation energy barrier to diffusion that decreases with the local fraction of the larger particle. The system autonomously reaches a cyclical non-equilibrium state characterized by the formation and dissolution of metastable micelle-like clusters with the small particles in the core and the large ones in the surrounding corona. The power spectrum of the fluctuations in the aggregation number exhibits 1/f noise reminiscent of self-organized critical systems. We suggest that the dynamical metastability of the micellar structures arises from an inversion of the energy landscape, in which the relaxation dynamics of one of the species induces a metastable phase for the other species. Royal Society of Chemistry 2018-01-02 /pmc/articles/PMC5887813/ /pubmed/29675210 http://dx.doi.org/10.1039/c7sc03524a Text en This journal is © The Royal Society of Chemistry 2018 http://creativecommons.org/licenses/by-nc/3.0/ This article is freely available. This article is licensed under a Creative Commons Attribution Non Commercial 3.0 Unported Licence (CC BY-NC 3.0) |
spellingShingle | Chemistry Pestana, Luis Ruiz Minnetian, Natalie Lammers, Laura Nielsen Head-Gordon, Teresa Dynamical inversion of the energy landscape promotes non-equilibrium self-assembly of binary mixtures |
title | Dynamical inversion of the energy landscape promotes non-equilibrium self-assembly of binary mixtures
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title_full | Dynamical inversion of the energy landscape promotes non-equilibrium self-assembly of binary mixtures
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title_fullStr | Dynamical inversion of the energy landscape promotes non-equilibrium self-assembly of binary mixtures
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title_full_unstemmed | Dynamical inversion of the energy landscape promotes non-equilibrium self-assembly of binary mixtures
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title_short | Dynamical inversion of the energy landscape promotes non-equilibrium self-assembly of binary mixtures
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title_sort | dynamical inversion of the energy landscape promotes non-equilibrium self-assembly of binary mixtures |
topic | Chemistry |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5887813/ https://www.ncbi.nlm.nih.gov/pubmed/29675210 http://dx.doi.org/10.1039/c7sc03524a |
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