石墨烯
双层石墨烯
石墨烯泡沫
化学气相沉积
材料科学
氧化石墨烯纸
石墨烯纳米带
退火(玻璃)
箔法
纳米技术
X射线光电子能谱
单层
化学工程
复合材料
工程类
作者
Geetanjali Deokar,J. Ávila,Ivy Razado-Colambo,Jean-Louis Codron,Christophe Boyaval,Élisabeth Galopin,M. C. Asensio,D. Vignaud
出处
期刊:Carbon
[Elsevier]
日期:2015-08-01
卷期号:89: 82-92
被引量:212
标识
DOI:10.1016/j.carbon.2015.03.017
摘要
Among the different graphene synthesis methods, chemical vapor deposition of graphene on low cost copper foil shows great promise for large scale applications. Here, we present growth experiments to obtain high quality graphene and its clean transfer onto any substrates. Bilayer-free monolayer graphene was obtained by a careful pre-annealing step and by optimizing the H2 flow during growth. The as-grown graphene was transferred using an improved wet chemical graphene transfer process. Some major flaws in the conventional wet chemical, polymethyl methacrylate (PMMA) assisted, graphene transfer process are addressed. The transferred graphene on arbitrary substrates was found to be free of metallic contaminants, defects (cracks, holes or folds caused by water trapped beneath graphene) and PMMA residues. The high quality of the transferred graphene was further evidenced by angle resolved photoelectron spectroscopy studies, for which the linear dependency of the electronic band structure characteristic of graphene was measured at the Dirac point. This is the first Dirac cone observation on the CVD grown graphene transferred on some 3D bulk substrate.
科研通智能强力驱动
Strongly Powered by AbleSci AI