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The Role of the Gas Phase in Graphene Formation by CVD on Copper

Trinsoutrot, Pierre and Rabot, Caroline and Vergnes, Hugues and Delamoreanu, Alexandru and Zenasni, Aziz and Caussat, Brigitte The Role of the Gas Phase in Graphene Formation by CVD on Copper. (2014) Chemical Vapor Deposition, 20 (1-2-3). 51-58. ISSN 0948-1907

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Official URL: https://doi.org/10.1002/cvde.201307075

Abstract

Graphene synthesis on copper foils is experimentally studied at 1000°C under various methane partial pressures. A decrease in the carbon supply permits the formation of larger graphene flakes with fewer layers and crystalline defects. An influence of the copper foil confinement on graphene nucleation and growth is shown. Then, methane pyrolysis is 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 can co‐exist during graphene synthesis, the first one arising in the reactor volume from methane pyrolysis, and the second one only forming in the vicinity of copper, thanks to its catalytic activity.

Item Type:Article
HAL Id:hal-01889823
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)
Other partners > Université Grenoble Alpes - UGA (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UPS (FRANCE)
Laboratory name:
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Deposited By: Loetitia MOYA
Deposited On:08 Oct 2018 07:19

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