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Controlling the Thermal Conductivity of Monolayer Graphene with Kirigami Structure

In this work, the thermal conductivity performance of graphene kirigami (GK) was systematically investigated via molecular dynamics (MD) simulations. The results indicate that the degree of defects (DD) on GK has a significant influence on thermal conductivity. Reducing the DD is the most effective...

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Autores principales: Gao, Yuan, Lu, Shuaijie, Chen, Weiqiang, Zhang, Jinyuan, Feng, Chundi, Liu, Yanming
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9694673/
https://www.ncbi.nlm.nih.gov/pubmed/36363683
http://dx.doi.org/10.3390/membranes12111128
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author Gao, Yuan
Lu, Shuaijie
Chen, Weiqiang
Zhang, Jinyuan
Feng, Chundi
Liu, Yanming
author_facet Gao, Yuan
Lu, Shuaijie
Chen, Weiqiang
Zhang, Jinyuan
Feng, Chundi
Liu, Yanming
author_sort Gao, Yuan
collection PubMed
description In this work, the thermal conductivity performance of graphene kirigami (GK) was systematically investigated via molecular dynamics (MD) simulations. The results indicate that the degree of defects (DD) on GK has a significant influence on thermal conductivity. Reducing the DD is the most effective way to decrease the thermal conductivity of GK. For zigzag-incised GK sheets, the change rate of thermal conductivity can reach up to 1.86 W/mK per 1% change in DD by tuning the incision length. The rate of changing thermal conductivity with DD can be slowed down by changing the width among incisions. Compared with the zigzag-incised GK sheets, heat transfer across the armchair-incised GK comes out more evenly, without significant steep and gentle stages along the heat transfer routes. More importantly, the GK structure can adjust the thermal conductivity by stretching, which the previously reported nanoporous graphene does not have. The change rate of thermal conductivity achieves about 0.17 W/mK with 1% stretching strain for simulated GK and can be further reduced at high tensile strain rates, benefiting the precise and variable control of the thermal conductivity of the monolayer graphene.
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spelling pubmed-96946732022-11-26 Controlling the Thermal Conductivity of Monolayer Graphene with Kirigami Structure Gao, Yuan Lu, Shuaijie Chen, Weiqiang Zhang, Jinyuan Feng, Chundi Liu, Yanming Membranes (Basel) Article In this work, the thermal conductivity performance of graphene kirigami (GK) was systematically investigated via molecular dynamics (MD) simulations. The results indicate that the degree of defects (DD) on GK has a significant influence on thermal conductivity. Reducing the DD is the most effective way to decrease the thermal conductivity of GK. For zigzag-incised GK sheets, the change rate of thermal conductivity can reach up to 1.86 W/mK per 1% change in DD by tuning the incision length. The rate of changing thermal conductivity with DD can be slowed down by changing the width among incisions. Compared with the zigzag-incised GK sheets, heat transfer across the armchair-incised GK comes out more evenly, without significant steep and gentle stages along the heat transfer routes. More importantly, the GK structure can adjust the thermal conductivity by stretching, which the previously reported nanoporous graphene does not have. The change rate of thermal conductivity achieves about 0.17 W/mK with 1% stretching strain for simulated GK and can be further reduced at high tensile strain rates, benefiting the precise and variable control of the thermal conductivity of the monolayer graphene. MDPI 2022-11-10 /pmc/articles/PMC9694673/ /pubmed/36363683 http://dx.doi.org/10.3390/membranes12111128 Text en © 2022 by the authors. 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
Gao, Yuan
Lu, Shuaijie
Chen, Weiqiang
Zhang, Jinyuan
Feng, Chundi
Liu, Yanming
Controlling the Thermal Conductivity of Monolayer Graphene with Kirigami Structure
title Controlling the Thermal Conductivity of Monolayer Graphene with Kirigami Structure
title_full Controlling the Thermal Conductivity of Monolayer Graphene with Kirigami Structure
title_fullStr Controlling the Thermal Conductivity of Monolayer Graphene with Kirigami Structure
title_full_unstemmed Controlling the Thermal Conductivity of Monolayer Graphene with Kirigami Structure
title_short Controlling the Thermal Conductivity of Monolayer Graphene with Kirigami Structure
title_sort controlling the thermal conductivity of monolayer graphene with kirigami structure
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9694673/
https://www.ncbi.nlm.nih.gov/pubmed/36363683
http://dx.doi.org/10.3390/membranes12111128
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