期刊
ACS NANO
卷 5, 期 12, 页码 9927-9933出版社
AMER CHEMICAL SOC
DOI: 10.1021/nn203700w
关键词
graphene; electrochemical delamination; nondestruction; recyclability; nanoripple
类别
资金
- NRF-CRP [R-143-000-360-281]
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.
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