On the nature of defects in liquid-phase exfoliated graphene

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Liquid-phase exfoliation is one of the most promising routes for large-scale production of multilayer graphene dispersions. These dispersions, which may be used in coatings, composites, or paints, are believed to contain disorder-free graphene multilayers. Here, we address the nature of defects in s...

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Autores principales:	Bracamonte, María Victoria, Lacconi, Gabriela Inés, Urreta, Silvia Elena, Foa Torres, Luis Eduardo Francisco
Formato:	article
Lenguaje:	Inglés
Publicado:	2021
Materias:	Raman Carbon-based materials Ultrasound Graphene dispersions
Acceso en línea:	http://hdl.handle.net/11086/20398 https://doi.org/10.1021/jp501930a
Aporte de:	Repositorio Digital Universitario (UNC) de Universidad Nacional de Córdoba

id	I10-R141-11086-20398
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institution	Universidad Nacional de Córdoba
institution_str	I-10
repository_str	R-141
collection	Repositorio Digital Universitario (UNC)
language	Inglés
topic	Raman Carbon-based materials Ultrasound Graphene dispersions
spellingShingle	Raman Carbon-based materials Ultrasound Graphene dispersions Bracamonte, María Victoria Lacconi, Gabriela Inés Urreta, Silvia Elena Foa Torres, Luis Eduardo Francisco On the nature of defects in liquid-phase exfoliated graphene
topic_facet	Raman Carbon-based materials Ultrasound Graphene dispersions
description	Liquid-phase exfoliation is one of the most promising routes for large-scale production of multilayer graphene dispersions. These dispersions, which may be used in coatings, composites, or paints, are believed to contain disorder-free graphene multilayers. Here, we address the nature of defects in such samples obtained by liquid-phase exfoliation of graphite powder in N-methyl-2-pyrrolidone. Our Raman spectroscopy data challenge the assumption that these multilayers are free of bulk defects, revealing that defect localization strongly depends on the sonication time. For short ultrasound times, defects are located mainly at the layer edges but they turn out to build up in the bulk for ultrasonic times above 2 h. This knowledge may help to devise better strategies to achieve high-quality graphene dispersions.
format	article
author	Bracamonte, María Victoria Lacconi, Gabriela Inés Urreta, Silvia Elena Foa Torres, Luis Eduardo Francisco
author_facet	Bracamonte, María Victoria Lacconi, Gabriela Inés Urreta, Silvia Elena Foa Torres, Luis Eduardo Francisco
author_sort	Bracamonte, María Victoria
title	On the nature of defects in liquid-phase exfoliated graphene
title_short	On the nature of defects in liquid-phase exfoliated graphene
title_full	On the nature of defects in liquid-phase exfoliated graphene
title_fullStr	On the nature of defects in liquid-phase exfoliated graphene
title_full_unstemmed	On the nature of defects in liquid-phase exfoliated graphene
title_sort	on the nature of defects in liquid-phase exfoliated graphene
publishDate	2021
url	http://hdl.handle.net/11086/20398 https://doi.org/10.1021/jp501930a
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On the nature of defects in liquid-phase exfoliated graphene

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