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Pré-Publication, Document De Travail Année : 2021

Study of the exfoliation and functionalization of graphene from graphite flakes with plasma discharge in solution

Adrien Létoffé
Cédric Noël
Gérard Henrion
Claire Hérold
Isabelle Royaud
Marc Ponçot
Sébastien Fontana
Stéphane Cuynet

Résumé

Graphene flakes were produced by nanosecond plasma discharge at atmospheric pressure between an electrode and the surface of distilled water, in which were placed graphite flakes. The discharge ionizes the gas and forms free radicals on the surface of the water, functionalizing the graphite flakes in solution. The plasma also gives enough energy to break the Van der Waals bonds between the graphene layers but not enough to break the covalent CC bonds within the layers. Transmission electron microscopy confirmed the hexagonal structure of graphene sheets, and showed that they were monocrystalline. No contamination was found in the obtained nanomaterial. An unknown phenomenon has been found in the activated distilled water, making its electrical conductivity decrease with an increasing temperature. An acidification of the water is observed. The gas in which the discharge takes place plays a major role on the process, no exfoliation is observed if plasmogen argon gas is used. I.
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Dates et versions

hal-03368865 , version 1 (07-10-2021)

Identifiants

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Quentin Liebgott, Corentin da Silva Tousch, Adrien Létoffé, Dorra Ibrahim, Hiba Kabbara, et al.. Study of the exfoliation and functionalization of graphene from graphite flakes with plasma discharge in solution. 2021. ⟨hal-03368865⟩
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