期刊
ACS NANO
卷 6, 期 6, 页码 5010-5017出版社
AMER CHEMICAL SOC
DOI: 10.1021/nn3016629
关键词
CVD; graphene; large crystal; copper
类别
资金
- EPSRC International Doctoral Scholarship (IDS)
- Wolfson China Scholarship
- China Oxford Scholarship Fund
- Overseas Research Scholarship
- Royal Society
- Balliol College
- U.S. Department of Energy, Office of Basic Energy Sciences [DE-AC02-98CH10886]
- EPSRC [EP/H001972/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/H001972/1] Funding Source: researchfish
A simple method is presented for synthesizing large single crystal graphene domains on melted copper using atmospheric pressure chemical vapor deposition (CVD). This is achieved by performing the reaction above the melting point of copper (1090 degrees C) and using a molybdenum or tungsten support to prevent balling of the copper from dewetting. By controlling the amount of hydrogen during growth, individual single crystal domains of monolayer graphene greater than 200 mu m are produced within a continuous film. Stopping growth before a complete film is formed reveals individual hexagonal domains of graphene that are epitaxially aligned in their orientation. Angular resolved photoemission spectroscopy is used to show that the graphene grown on copper exhibits a linear dispersion relationship and no sign of doping. HRTEM and electron diffraction reveal a uniform high quality crystalline atomic structure of monolayer graphene.
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