Identification of abrupt intense rhombohedral stacking-transitions in dense-staircase-sublattices created by manual exfoliation of highly oriented pyrolytic graphite

Controlling Bernal (AB) to rhombohedral (ABC) stacking-transitions has recently become an important goal towards manipulation of the electronic properties of highly- oriented-pyrolytic-graphite (HOPG) and graphene.In this letter we report a novel investigation of AB to ABC stacking transitions in ex...

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Autores principales:	Hansong Wu, Wenkang Li, Wenxue Li, Yixin Dai, Jiaxin Song, Yi He, Jian Guo, Hong Zhang, Filippo S. Boi
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	Rhombohedral-graphite exfoliation phase-transition percolative theory Chemistry QD1-999
Acceso en línea:	https://doaj.org/article/45043cd3d04a424b8a3af1ddd19ea7d1
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spelling	oai:doaj.org-article:45043cd3d04a424b8a3af1ddd19ea7d12021-11-22T04:33:20ZIdentification of abrupt intense rhombohedral stacking-transitions in dense-staircase-sublattices created by manual exfoliation of highly oriented pyrolytic graphite2667-056910.1016/j.cartre.2021.100128https://doaj.org/article/45043cd3d04a424b8a3af1ddd19ea7d12021-10-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S266705692100105Xhttps://doaj.org/toc/2667-0569Controlling Bernal (AB) to rhombohedral (ABC) stacking-transitions has recently become an important goal towards manipulation of the electronic properties of highly- oriented-pyrolytic-graphite (HOPG) and graphene.In this letter we report a novel investigation of AB to ABC stacking transitions in exfoliated-HOPG-lamellae with variable thickness. The samples were produced by employing I) an edge-tape-exfoliation-method to extrude lamellae of ∼ 80–140 μm thickness and 2) a manual-exfoliation-method, which yielded samples of ∼ 300–450 μm thickness. Characterization was carried out by employing Raman-point/mapping-spectroscopy in certain selected defective-regions of the samples. We demonstrate an abrupt enhancement of the rhombohedral-phase-content within dense- and thick-staircase-sublattices, indicative of a possible crucial role of the sublattice-defect-thickness in preventing ABC to AB post-exfoliation stacking-relaxation. Relaxation of the produced ABC stacks was then found after approximately four weeks from exfoliation (in thick lamellae).Hansong WuWenkang LiWenxue LiYixin DaiJiaxin SongYi HeJian GuoHong ZhangFilippo S. BoiElsevierarticleRhombohedral-graphiteexfoliationphase-transitionpercolative theoryChemistryQD1-999ENCarbon Trends, Vol 5, Iss , Pp 100128- (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Rhombohedral-graphite exfoliation phase-transition percolative theory Chemistry QD1-999
spellingShingle	Rhombohedral-graphite exfoliation phase-transition percolative theory Chemistry QD1-999 Hansong Wu Wenkang Li Wenxue Li Yixin Dai Jiaxin Song Yi He Jian Guo Hong Zhang Filippo S. Boi Identification of abrupt intense rhombohedral stacking-transitions in dense-staircase-sublattices created by manual exfoliation of highly oriented pyrolytic graphite
description	Controlling Bernal (AB) to rhombohedral (ABC) stacking-transitions has recently become an important goal towards manipulation of the electronic properties of highly- oriented-pyrolytic-graphite (HOPG) and graphene.In this letter we report a novel investigation of AB to ABC stacking transitions in exfoliated-HOPG-lamellae with variable thickness. The samples were produced by employing I) an edge-tape-exfoliation-method to extrude lamellae of ∼ 80–140 μm thickness and 2) a manual-exfoliation-method, which yielded samples of ∼ 300–450 μm thickness. Characterization was carried out by employing Raman-point/mapping-spectroscopy in certain selected defective-regions of the samples. We demonstrate an abrupt enhancement of the rhombohedral-phase-content within dense- and thick-staircase-sublattices, indicative of a possible crucial role of the sublattice-defect-thickness in preventing ABC to AB post-exfoliation stacking-relaxation. Relaxation of the produced ABC stacks was then found after approximately four weeks from exfoliation (in thick lamellae).
format	article
author	Hansong Wu Wenkang Li Wenxue Li Yixin Dai Jiaxin Song Yi He Jian Guo Hong Zhang Filippo S. Boi
author_facet	Hansong Wu Wenkang Li Wenxue Li Yixin Dai Jiaxin Song Yi He Jian Guo Hong Zhang Filippo S. Boi
author_sort	Hansong Wu
title	Identification of abrupt intense rhombohedral stacking-transitions in dense-staircase-sublattices created by manual exfoliation of highly oriented pyrolytic graphite
title_short	Identification of abrupt intense rhombohedral stacking-transitions in dense-staircase-sublattices created by manual exfoliation of highly oriented pyrolytic graphite
title_full	Identification of abrupt intense rhombohedral stacking-transitions in dense-staircase-sublattices created by manual exfoliation of highly oriented pyrolytic graphite
title_fullStr	Identification of abrupt intense rhombohedral stacking-transitions in dense-staircase-sublattices created by manual exfoliation of highly oriented pyrolytic graphite
title_full_unstemmed	Identification of abrupt intense rhombohedral stacking-transitions in dense-staircase-sublattices created by manual exfoliation of highly oriented pyrolytic graphite
title_sort	identification of abrupt intense rhombohedral stacking-transitions in dense-staircase-sublattices created by manual exfoliation of highly oriented pyrolytic graphite
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/45043cd3d04a424b8a3af1ddd19ea7d1
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Identification of abrupt intense rhombohedral stacking-transitions in dense-staircase-sublattices created by manual exfoliation of highly oriented pyrolytic graphite

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