Open AccessA simple method to tune graphene growth between monolayer and bilayer
Author(s) -
Xiaozhi Xu,
Chenfang Lin,
Rui Fu,
Shuo Wang,
Rui Pan,
Guangshi Chen,
Qixin Shen,
Can Liu,
Xia Guo,
Yiquan Wang,
Ruguang Zhao,
Kaihui Liu,
Zhengtang Luo,
Zonghai Hu,
Hongyun Li
Publication year - 2016
Publication title -
aip advances
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.421
H-Index - 58
ISSN - 2158-3226
DOI - 10.1063/1.4943040
Subject(s) - monolayer , bilayer , bilayer graphene , graphene , materials science , substrate (aquarium) , foil method , chemical vapor deposition , nanotechnology , analytical chemistry (journal) , chemical physics , membrane , chemistry , composite material , organic chemistry , biochemistry , oceanography , geology
Selective growth of either monolayer or bilayer graphene is of great importance. We developed a method to readily tune large area graphene growth from complete monolayer to complete bilayer. In an ambient pressure chemical vapor deposition process, we used the sample temperature at which to start the H2 flow as the control parameter and realized the change from monolayer to bilayer growth of graphene on Cu foil. When the H2 starting temperature was above 700°C, continuous monolayer graphene films were obtained. When the H2 starting temperature was below 350°C, continuous bilayer films were obtained. Detailed characterization of the samples treated under various conditions revealed that heating without the H2 flow caused Cu oxidation. The more the Cu substrate oxidized, the less graphene bilayer could form
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