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Structural Dynamics in the Presence of Water of Graphene Bilayers with Defects

The dynamics of a bilayer of graphene containing one mono-vacancy in the top layer has been investigated in the framework of DFTB in the absence and in the presence of water. Due to the speed of the code, we can describe details of the behavior, which are not directly accessible experimentally and c...

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Autor principal: Santos, Elizabeth
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10385876/
https://www.ncbi.nlm.nih.gov/pubmed/37513049
http://dx.doi.org/10.3390/nano13142038
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author Santos, Elizabeth
author_facet Santos, Elizabeth
author_sort Santos, Elizabeth
collection PubMed
description The dynamics of a bilayer of graphene containing one mono-vacancy in the top layer has been investigated in the framework of DFTB in the absence and in the presence of water. Due to the speed of the code, we can describe details of the behavior, which are not directly accessible experimentally and cannot be treated by DFT or classical molecular dynamics. The presence of water enhances the displacement of carbon atoms in the perpendicular direction to the surface. Our results explain very well a variety of experimental findings. In particular, the stabilization of the Jahn–Teller distortion by hydrogenation of one of the carbon atoms at the edge of a mono-vacancy has been elucidated. This work is the first analysis of the behavior of a graphene vacancy at room temperature in contact with water based on a quantum mechanical molecular dynamics method, where both graphene and solvent are treated at the same level.
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spelling pubmed-103858762023-07-30 Structural Dynamics in the Presence of Water of Graphene Bilayers with Defects Santos, Elizabeth Nanomaterials (Basel) Article The dynamics of a bilayer of graphene containing one mono-vacancy in the top layer has been investigated in the framework of DFTB in the absence and in the presence of water. Due to the speed of the code, we can describe details of the behavior, which are not directly accessible experimentally and cannot be treated by DFT or classical molecular dynamics. The presence of water enhances the displacement of carbon atoms in the perpendicular direction to the surface. Our results explain very well a variety of experimental findings. In particular, the stabilization of the Jahn–Teller distortion by hydrogenation of one of the carbon atoms at the edge of a mono-vacancy has been elucidated. This work is the first analysis of the behavior of a graphene vacancy at room temperature in contact with water based on a quantum mechanical molecular dynamics method, where both graphene and solvent are treated at the same level. MDPI 2023-07-10 /pmc/articles/PMC10385876/ /pubmed/37513049 http://dx.doi.org/10.3390/nano13142038 Text en © 2023 by the author. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Santos, Elizabeth
Structural Dynamics in the Presence of Water of Graphene Bilayers with Defects
title Structural Dynamics in the Presence of Water of Graphene Bilayers with Defects
title_full Structural Dynamics in the Presence of Water of Graphene Bilayers with Defects
title_fullStr Structural Dynamics in the Presence of Water of Graphene Bilayers with Defects
title_full_unstemmed Structural Dynamics in the Presence of Water of Graphene Bilayers with Defects
title_short Structural Dynamics in the Presence of Water of Graphene Bilayers with Defects
title_sort structural dynamics in the presence of water of graphene bilayers with defects
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10385876/
https://www.ncbi.nlm.nih.gov/pubmed/37513049
http://dx.doi.org/10.3390/nano13142038
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