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Buckling Behavior of Substrate Supported Graphene Sheets

The buckling of graphene sheets on substrates can significantly degrade their performance in materials and devices. Therefore, a systematic investigation on the buckling behavior of monolayer graphene sheet/substrate systems is carried out in this paper by both molecular mechanics simulations and th...

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Autores principales: Yang, Kuijian, Chen, Yuli, Pan, Fei, Wang, Shengtao, Ma, Yong, Liu, Qijun
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2016
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5456546/
https://www.ncbi.nlm.nih.gov/pubmed/28787831
http://dx.doi.org/10.3390/ma9010032
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author Yang, Kuijian
Chen, Yuli
Pan, Fei
Wang, Shengtao
Ma, Yong
Liu, Qijun
author_facet Yang, Kuijian
Chen, Yuli
Pan, Fei
Wang, Shengtao
Ma, Yong
Liu, Qijun
author_sort Yang, Kuijian
collection PubMed
description The buckling of graphene sheets on substrates can significantly degrade their performance in materials and devices. Therefore, a systematic investigation on the buckling behavior of monolayer graphene sheet/substrate systems is carried out in this paper by both molecular mechanics simulations and theoretical analysis. From 70 simulation cases of simple-supported graphene sheets with different sizes under uniaxial compression, two different buckling modes are investigated and revealed to be dominated by the graphene size. Especially, for graphene sheets with length larger than 3 nm and width larger than 1.1 nm, the buckling mode depends only on the length/width ratio. Besides, it is revealed that the existence of graphene substrate can increase the critical buckling stress and strain to 4.39 N/m and 1.58%, respectively, which are about 10 times those for free-standing graphene sheets. Moreover, for graphene sheets with common size (longer than 20 nm), both theoretical and simulation results show that the critical buckling stress and strain are dominated only by the adhesive interactions with substrate and independent of the graphene size. Results in this work provide valuable insight and guidelines for the design and application of graphene-derived materials and nano-electromechanical systems.
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spelling pubmed-54565462017-07-28 Buckling Behavior of Substrate Supported Graphene Sheets Yang, Kuijian Chen, Yuli Pan, Fei Wang, Shengtao Ma, Yong Liu, Qijun Materials (Basel) Article The buckling of graphene sheets on substrates can significantly degrade their performance in materials and devices. Therefore, a systematic investigation on the buckling behavior of monolayer graphene sheet/substrate systems is carried out in this paper by both molecular mechanics simulations and theoretical analysis. From 70 simulation cases of simple-supported graphene sheets with different sizes under uniaxial compression, two different buckling modes are investigated and revealed to be dominated by the graphene size. Especially, for graphene sheets with length larger than 3 nm and width larger than 1.1 nm, the buckling mode depends only on the length/width ratio. Besides, it is revealed that the existence of graphene substrate can increase the critical buckling stress and strain to 4.39 N/m and 1.58%, respectively, which are about 10 times those for free-standing graphene sheets. Moreover, for graphene sheets with common size (longer than 20 nm), both theoretical and simulation results show that the critical buckling stress and strain are dominated only by the adhesive interactions with substrate and independent of the graphene size. Results in this work provide valuable insight and guidelines for the design and application of graphene-derived materials and nano-electromechanical systems. MDPI 2016-01-07 /pmc/articles/PMC5456546/ /pubmed/28787831 http://dx.doi.org/10.3390/ma9010032 Text en © 2016 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons by Attribution (CC-BY) license http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Yang, Kuijian
Chen, Yuli
Pan, Fei
Wang, Shengtao
Ma, Yong
Liu, Qijun
Buckling Behavior of Substrate Supported Graphene Sheets
title Buckling Behavior of Substrate Supported Graphene Sheets
title_full Buckling Behavior of Substrate Supported Graphene Sheets
title_fullStr Buckling Behavior of Substrate Supported Graphene Sheets
title_full_unstemmed Buckling Behavior of Substrate Supported Graphene Sheets
title_short Buckling Behavior of Substrate Supported Graphene Sheets
title_sort buckling behavior of substrate supported graphene sheets
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5456546/
https://www.ncbi.nlm.nih.gov/pubmed/28787831
http://dx.doi.org/10.3390/ma9010032
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