Cargando…
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...
Autores principales: | , , , , , |
---|---|
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 |
_version_ | 1783697786665959424 |
---|---|
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. |
format | Online Article Text |
id | pubmed-8148139 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
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 |
work_keys_str_mv | AT tanakashigeru grapheneformationthroughpulsedwiredischargeofgraphitestripsinwaterexfoliationmechanism AT inaodaisuke grapheneformationthroughpulsedwiredischargeofgraphitestripsinwaterexfoliationmechanism AT hasegawakouki grapheneformationthroughpulsedwiredischargeofgraphitestripsinwaterexfoliationmechanism AT hokamotokazuyuki grapheneformationthroughpulsedwiredischargeofgraphitestripsinwaterexfoliationmechanism AT chenpengwan grapheneformationthroughpulsedwiredischargeofgraphitestripsinwaterexfoliationmechanism AT gaoxin grapheneformationthroughpulsedwiredischargeofgraphitestripsinwaterexfoliationmechanism |