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Measurement of the cleavage energy of graphite

The basal plane cleavage energy (CE) of graphite is a key material parameter for understanding many of the unusual properties of graphite, graphene and carbon nanotubes. Nonetheless, a wide range of values for the CE has been reported and no consensus has yet emerged. Here we report the first direct...

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Autores principales: Wang, Wen, Dai, Shuyang, Li, Xide, Yang, Jiarui, Srolovitz, David J., Zheng, Quanshui
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Pub. Group 2015
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4560750/
https://www.ncbi.nlm.nih.gov/pubmed/26314373
http://dx.doi.org/10.1038/ncomms8853
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author Wang, Wen
Dai, Shuyang
Li, Xide
Yang, Jiarui
Srolovitz, David J.
Zheng, Quanshui
author_facet Wang, Wen
Dai, Shuyang
Li, Xide
Yang, Jiarui
Srolovitz, David J.
Zheng, Quanshui
author_sort Wang, Wen
collection PubMed
description The basal plane cleavage energy (CE) of graphite is a key material parameter for understanding many of the unusual properties of graphite, graphene and carbon nanotubes. Nonetheless, a wide range of values for the CE has been reported and no consensus has yet emerged. Here we report the first direct, accurate experimental measurement of the CE of graphite using a novel method based on the self-retraction phenomenon in graphite. The measured value, 0.37±0.01 J m(−2) for the incommensurate state of bicrystal graphite, is nearly invariant with respect to temperature (22 °C≤T≤198 °C) and bicrystal twist angle, and insensitive to impurities from the atmosphere. The CE for the ideal ABAB graphite stacking, 0.39±0.02 J m(−2), is calculated based on a combination of the measured CE and a theoretical calculation. These experimental measurements are also ideal for use in evaluating the efficacy of competing theoretical approaches.
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spelling pubmed-45607502015-09-14 Measurement of the cleavage energy of graphite Wang, Wen Dai, Shuyang Li, Xide Yang, Jiarui Srolovitz, David J. Zheng, Quanshui Nat Commun Article The basal plane cleavage energy (CE) of graphite is a key material parameter for understanding many of the unusual properties of graphite, graphene and carbon nanotubes. Nonetheless, a wide range of values for the CE has been reported and no consensus has yet emerged. Here we report the first direct, accurate experimental measurement of the CE of graphite using a novel method based on the self-retraction phenomenon in graphite. The measured value, 0.37±0.01 J m(−2) for the incommensurate state of bicrystal graphite, is nearly invariant with respect to temperature (22 °C≤T≤198 °C) and bicrystal twist angle, and insensitive to impurities from the atmosphere. The CE for the ideal ABAB graphite stacking, 0.39±0.02 J m(−2), is calculated based on a combination of the measured CE and a theoretical calculation. These experimental measurements are also ideal for use in evaluating the efficacy of competing theoretical approaches. Nature Pub. Group 2015-08-28 /pmc/articles/PMC4560750/ /pubmed/26314373 http://dx.doi.org/10.1038/ncomms8853 Text en Copyright © 2015, Nature Publishing Group, a division of Macmillan Publishers Limited. All Rights Reserved. http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article's Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/
spellingShingle Article
Wang, Wen
Dai, Shuyang
Li, Xide
Yang, Jiarui
Srolovitz, David J.
Zheng, Quanshui
Measurement of the cleavage energy of graphite
title Measurement of the cleavage energy of graphite
title_full Measurement of the cleavage energy of graphite
title_fullStr Measurement of the cleavage energy of graphite
title_full_unstemmed Measurement of the cleavage energy of graphite
title_short Measurement of the cleavage energy of graphite
title_sort measurement of the cleavage energy of graphite
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4560750/
https://www.ncbi.nlm.nih.gov/pubmed/26314373
http://dx.doi.org/10.1038/ncomms8853
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