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	Adlayer-Free Large-Area Single Crystal Graphene Grown on a Cu(111) Foil
	Luo, Da1; Wang, Meihui2; Li, Yunqing3; Kim, Changsik4; Yu, Ka Man5; Kim, Yohan3; Han, Huijun3; Biswal, Mandakini1; Huang, Ming1; Kwon, Youngwoo1
	2019-08-01
摘要	To date, thousands of publications have reported chemical vapor deposition growth of "single layer" graphene, but none of them has described truly single layer graphene over large area because a fraction of the area has adlayers. It is found that the amount of subsurface carbon (leading to additional nuclei) in Cu foils directly correlates with the extent of adlayer growth. Annealing in hydrogen gas atmosphere depletes the subsurface carbon in the Cu foil. Adlayer-free single crystal and polycrystalline single layer graphene films are grown on Cu(111) and polycrystalline Cu foils containing no subsurface carbon, respectively. This single crystal graphene contains parallel, centimeter-long approximate to 100 nm wide "folds," separated by 20 to 50 mu m, while folds (and wrinkles) are distributed quasi-randomly in the polycrystalline graphene film. High-performance field-effect transistors are readily fabricated in the large regions between adjacent parallel folds in the adlayer-free single crystal graphene film.
关键词	adlayer-free chemical vapor deposition (CVD) Cu(111) folds single crystal graphene
DOI	10.1002/adma.201903615
发表期刊	ADVANCED MATERIALS
ISSN	0935-9648
卷号	31期号:35页码:13
通讯作者	Ruoff, Rodney S.(ruofflab@gmail.com)
收录类别	SCI
WOS记录号	WOS:000483550000009
语种	英语