Journal
JOURNAL OF PHYSICAL CHEMISTRY C
Volume 117, Issue 27, Pages 14348-14353Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jp403410b
Keywords
-
Funding
- National Natural Science Foundation of China [61275105, 61177059, 21006079]
- Natural Science Basic Research Plan in Shaanxi Province of China [2012KJXX-27, 12JK0990]
- Ph.D. Programs Foundation of Ministry of Education of China [20106101110017, 20126101120029]
- Northwest University Cross-discipline Fund [YZZ12027]
- open foundation of State Key Lab Incubation Base of Photoelectric Technology and Functional Materials [ZS12018]
Ask authors/readers for more resources
Acetylene (C2H2) and copper foil have been chosen as carbon precursor and catalyst, respectively, for the synthesis of graphene by atmospheric pressure chemical vapor deposition. The effects of hydrogen (H-2) concentration on graphene growth have been studied by Raman spectroscopy and transmission electron microscopy. Different to methane as a carbon precursor, high-quality bilayer graphene films can be grown rapidly with the ratio of H-2 and argon (Ar) flow rates (H-2/Ar) range from 0.010 to 0.111. However, with the further increase of H-2 concentration (H-2/Ar = 0.250 and H-2/Ar = 0.429), multilayer graphene domains are dominant on top of the bilayer graphene films. These observations demonstrate that H-2 serves as an activator of the surface bound carbon for the bilayer graphene growth, while showing an etching effect that controls the morphology, nucleation density, and nucleation size of the multilayer graphene domains. The results offer useful insights into the understanding of the kinetic effect of H-2 on scalable synthesis of graphene with C2H2.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available