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Remarkable Role of Grain Boundaries in the Thermal Transport Properties of Phosphorene

[Image: see text] In this work, we study the effect of grain boundary (GB) on the thermal transport of phosphorene by using molecular dynamics simulations. By exploring a total of 19 GBs with different GB defect types and densities, we find that there is a relatively high Kapitza thermal boundary re...

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Autores principales: Liu, Xiangjun, Gao, Junfeng, Zhang, Gang, Zhao, Jijun, Zhang, Yong-Wei
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Chemical Society 2020
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7377073/
https://www.ncbi.nlm.nih.gov/pubmed/32715226
http://dx.doi.org/10.1021/acsomega.0c01806
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author Liu, Xiangjun
Gao, Junfeng
Zhang, Gang
Zhao, Jijun
Zhang, Yong-Wei
author_facet Liu, Xiangjun
Gao, Junfeng
Zhang, Gang
Zhao, Jijun
Zhang, Yong-Wei
author_sort Liu, Xiangjun
collection PubMed
description [Image: see text] In this work, we study the effect of grain boundary (GB) on the thermal transport of phosphorene by using molecular dynamics simulations. By exploring a total of 19 GBs with different GB defect types and densities, we find that there is a relatively high Kapitza thermal boundary resistance at these boundaries. By analyzing the spatial distributions of the heat flux, we find that this high thermal boundary resistance can be attributed to the strong phonon-boundary scattering at the GBs. With the same type of defect, the thermal boundary resistance is found to increase with the increase of the defect density along the GBs, which can be attributed to the nonuniform distribution of stress and lattice distortion. Finally, we investigate the anisotropy in the thermal conductivity of phosphorene with GBs and reveal a strikingly high anisotropy ratio of thermal conductivities, which is found to arise from the different influences of boundaries on the thermal transport along the zigzag and armchair directions. Our results highlight the importance of GBs in the transport behavior of phosphorene and the need to include their effects in the thermal management of phosphorene-based electronic devices.
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spelling pubmed-73770732020-07-24 Remarkable Role of Grain Boundaries in the Thermal Transport Properties of Phosphorene Liu, Xiangjun Gao, Junfeng Zhang, Gang Zhao, Jijun Zhang, Yong-Wei ACS Omega [Image: see text] In this work, we study the effect of grain boundary (GB) on the thermal transport of phosphorene by using molecular dynamics simulations. By exploring a total of 19 GBs with different GB defect types and densities, we find that there is a relatively high Kapitza thermal boundary resistance at these boundaries. By analyzing the spatial distributions of the heat flux, we find that this high thermal boundary resistance can be attributed to the strong phonon-boundary scattering at the GBs. With the same type of defect, the thermal boundary resistance is found to increase with the increase of the defect density along the GBs, which can be attributed to the nonuniform distribution of stress and lattice distortion. Finally, we investigate the anisotropy in the thermal conductivity of phosphorene with GBs and reveal a strikingly high anisotropy ratio of thermal conductivities, which is found to arise from the different influences of boundaries on the thermal transport along the zigzag and armchair directions. Our results highlight the importance of GBs in the transport behavior of phosphorene and the need to include their effects in the thermal management of phosphorene-based electronic devices. American Chemical Society 2020-07-06 /pmc/articles/PMC7377073/ /pubmed/32715226 http://dx.doi.org/10.1021/acsomega.0c01806 Text en Copyright © 2020 American Chemical Society This is an open access article published under an ACS AuthorChoice License (http://pubs.acs.org/page/policy/authorchoice_termsofuse.html) , which permits copying and redistribution of the article or any adaptations for non-commercial purposes.
spellingShingle Liu, Xiangjun
Gao, Junfeng
Zhang, Gang
Zhao, Jijun
Zhang, Yong-Wei
Remarkable Role of Grain Boundaries in the Thermal Transport Properties of Phosphorene
title Remarkable Role of Grain Boundaries in the Thermal Transport Properties of Phosphorene
title_full Remarkable Role of Grain Boundaries in the Thermal Transport Properties of Phosphorene
title_fullStr Remarkable Role of Grain Boundaries in the Thermal Transport Properties of Phosphorene
title_full_unstemmed Remarkable Role of Grain Boundaries in the Thermal Transport Properties of Phosphorene
title_short Remarkable Role of Grain Boundaries in the Thermal Transport Properties of Phosphorene
title_sort remarkable role of grain boundaries in the thermal transport properties of phosphorene
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7377073/
https://www.ncbi.nlm.nih.gov/pubmed/32715226
http://dx.doi.org/10.1021/acsomega.0c01806
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