Synthesis and characterization of graphene: influence of synthesis variables

• Published in: Physical chemistry chemical physics : PCCP Vol. 16; no. 7; pp. 2962 - 297
• Main Authors: Lavin-Lopez, M. P, Valverde, J. L, Cuevas, M. C, Garrido, A, Sanchez-Silva, L, Martinez, P, Romero-Izquierdo, A
• Format: Journal Article
• Language: English
• Published: England 01.01.2014
• Subjects: Barometric pressure; Computer programs; Foils; Graphene; Multilayers; Optimization; Precursors; Synthesis
• ISSN: 1463-9076; 1463-9084
• DOI: 10.1039/c3cp54832e

The optimization of graphene growth on copper foils using an atmospheric pressure chemical vapor deposition setup is reported. CH 4 and H 2 were used as precursor gases and Raman spectroscopy as the main graphene characterization technique. Different growth parameters, including temperature and reaction time, the molar ratio of CH 4 /H 2 in the feed and total flow of gases during the reaction step, were studied in detail. It was shown that graphene growth was not homogeneous in the entire sample, multilayer graphene was present in most of the sample, however as the synthesis parameters were optimized, graphene gained better quality, obtaining bilayer graphene over most of the sheet in the final optimized sample. Homemade software was used to analyze the quality of the synthesised graphene, obtaining a more quality graphene according to the synthesis parameters optimized. An optimal bilayer graphene sample was prepared at the lowest growth time (10 min) and the highest synthesis temperature (1050 °C), using a CH 4 /H 2 flow ratio and a total flow rate ratio of precursors of 7% and 60 Nml (CH 4 + H 4 ) per min respectively. The optimization of graphene growth on copper foils using an atmospheric pressure chemical vapor deposition setup is reported.