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Role of the gas phase in graphene formation by chemical vapor deposition on copper

Trinsoutrot, Pierre and Rabot, Caroline and Vergnes, Hugues and Delamoreanu, Alexandru and Zenasni, Aziz and Caussat, Brigitte Role of the gas phase in graphene formation by chemical vapor deposition on copper. (2013) Chemical Vapor Deposition, vol. 19. ISSN 0948-1907

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Official URL: http://dx.doi.org/10.1002/cvde.201307075

Abstract

Graphene synthesis was experimentally studied at 1000°C on copper foils at various methane partial pressures. A decrease of carbon supply allows the formation of larger graphene flakes with less layers and crystalline defects. An influence of the copper foil confinement was evidenced on graphene nucleation and growth. Then, methane pyrolysis was simulated using the Fluent Ansys® code. The model shows that at 1000°C, CH4 is decomposed to form gaseous saturated and unsaturated species. This means that two types of unsaturated species could co-exist during graphene synthesis, the first one born in the reactor volume from methane pyrolysis, and the second one only formed at the vicinity of copper, thanks to its catalytic activity.

Item Type:Article
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Commissariat à l'Energie Atomique et aux énergies alternatives - CEA (FRANCE)
French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT (FRANCE)
Other partners > MINATEC (FRANCE)
Université de Toulouse > Université Paul Sabatier-Toulouse III - UPS (FRANCE)
Laboratory name:
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Deposited By: Brigitte CAUSSAT-BONNANS
Deposited On:19 Nov 2013 11:12

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