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Title: Electrochemical delamination of CVD-grown graphene film: Toward the recyclable use of copper catalyst
Authors: Wang, Y. 
Zheng, Y. 
Xu, X. 
Dubuisson, E. 
Bao, Q. 
Lu, J.
Loh, K.P. 
Keywords: electrochemical delamination
Issue Date: 27-Dec-2011
Citation: Wang, Y., Zheng, Y., Xu, X., Dubuisson, E., Bao, Q., Lu, J., Loh, K.P. (2011-12-27). Electrochemical delamination of CVD-grown graphene film: Toward the recyclable use of copper catalyst. ACS Nano 5 (12) : 9927-9933. ScholarBank@NUS Repository.
Abstract: The separation of chemical vapor deposited (CVD) graphene from the metallic catalyst it is grown on, followed by a subsequent transfer to a dielectric substrate, is currently the adopted method for device fabrication. Most transfer techniques use a chemical etching method to dissolve the metal catalysts, thus imposing high material cost in large-scale fabrication. Here, we demonstrate a highly efficient, nondestructive electrochemical route for the delamination of CVD graphene film from metal surfaces. The electrochemically delaminated graphene films are continuous over 95% of the surface and exhibit increasingly better electronic quality after several growth cycles on the reused copper catalyst, due to the suppression of quasi-periodical nanoripples induced by copper step edges. The electrochemical delamination process affords the advantages of high efficiency, low-cost recyclability, and minimal use of etching chemicals. © 2011 American Chemical Society.
Source Title: ACS Nano
ISSN: 19360851
DOI: 10.1021/nn203700w
Appears in Collections:Staff Publications

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