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Graphene Formation through Pulsed Wire Discharge of Graphite Strips in Water: Exfoliation Mechanism

This study aims to clarify the mechanism of exfoliation of graphene through electrical pulsed wire discharge (PWD) of a graphite strip, made by the compression of inexpensive expanded graphite in water. The explosion of the graphite strip was visualized using a high-speed video camera. During the en...

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Detalles Bibliográficos
Autores principales: Tanaka, Shigeru, Inao, Daisuke, Hasegawa, Kouki, Hokamoto, Kazuyuki, Chen, Pengwan, Gao, Xin
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8148139/
https://www.ncbi.nlm.nih.gov/pubmed/34066459
http://dx.doi.org/10.3390/nano11051223
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author Tanaka, Shigeru
Inao, Daisuke
Hasegawa, Kouki
Hokamoto, Kazuyuki
Chen, Pengwan
Gao, Xin
author_facet Tanaka, Shigeru
Inao, Daisuke
Hasegawa, Kouki
Hokamoto, Kazuyuki
Chen, Pengwan
Gao, Xin
author_sort Tanaka, Shigeru
collection PubMed
description This study aims to clarify the mechanism of exfoliation of graphene through electrical pulsed wire discharge (PWD) of a graphite strip, made by the compression of inexpensive expanded graphite in water. The explosion of the graphite strip was visualized using a high-speed video camera. During the energized heating of the sample, explosions, accompanied by shock waves due to expansion of gas inside the sample, occurred at various locations of the sample, and the sample started to expand rapidly. The exfoliated graphene was observed as a region with low light transmittance. The PWD phenomenon of graphite strips, a type of porous material, is reasonably explained by the change in electrical resistivity of the sample during discharge and the light emission due to energy transition of the excited gas.
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spelling pubmed-81481392021-05-26 Graphene Formation through Pulsed Wire Discharge of Graphite Strips in Water: Exfoliation Mechanism Tanaka, Shigeru Inao, Daisuke Hasegawa, Kouki Hokamoto, Kazuyuki Chen, Pengwan Gao, Xin Nanomaterials (Basel) Article This study aims to clarify the mechanism of exfoliation of graphene through electrical pulsed wire discharge (PWD) of a graphite strip, made by the compression of inexpensive expanded graphite in water. The explosion of the graphite strip was visualized using a high-speed video camera. During the energized heating of the sample, explosions, accompanied by shock waves due to expansion of gas inside the sample, occurred at various locations of the sample, and the sample started to expand rapidly. The exfoliated graphene was observed as a region with low light transmittance. The PWD phenomenon of graphite strips, a type of porous material, is reasonably explained by the change in electrical resistivity of the sample during discharge and the light emission due to energy transition of the excited gas. MDPI 2021-05-06 /pmc/articles/PMC8148139/ /pubmed/34066459 http://dx.doi.org/10.3390/nano11051223 Text en © 2021 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
Tanaka, Shigeru
Inao, Daisuke
Hasegawa, Kouki
Hokamoto, Kazuyuki
Chen, Pengwan
Gao, Xin
Graphene Formation through Pulsed Wire Discharge of Graphite Strips in Water: Exfoliation Mechanism
title Graphene Formation through Pulsed Wire Discharge of Graphite Strips in Water: Exfoliation Mechanism
title_full Graphene Formation through Pulsed Wire Discharge of Graphite Strips in Water: Exfoliation Mechanism
title_fullStr Graphene Formation through Pulsed Wire Discharge of Graphite Strips in Water: Exfoliation Mechanism
title_full_unstemmed Graphene Formation through Pulsed Wire Discharge of Graphite Strips in Water: Exfoliation Mechanism
title_short Graphene Formation through Pulsed Wire Discharge of Graphite Strips in Water: Exfoliation Mechanism
title_sort graphene formation through pulsed wire discharge of graphite strips in water: exfoliation mechanism
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8148139/
https://www.ncbi.nlm.nih.gov/pubmed/34066459
http://dx.doi.org/10.3390/nano11051223
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