期刊
LANGMUIR
卷 30, 期 38, 页码 11485-11492出版社
AMER CHEMICAL SOC
DOI: 10.1021/la5028493
关键词
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资金
- Royal Society
- European Research Council (ERC) [ERC-2009-StG240500 DEDIGROWTH, ERC-2012-PoC 309786 DEVICE]
- Engineering and Physical Sciences Research Council (EPSRC Pathways to Impact Awards)
- Leverhulme Trust [F/07 134/DK, F/07 134/DN]
- John Fell Fund (Oxford University)
- EPSRC [EP/J015202/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [1379192, EP/J015202/1, 1238609] Funding Source: researchfish
We report a method for transferring graphene, grown by chemical vapor deposition, which produces ultraflat graphene surfaces (root-mean-square roughness of 0.19 nm) free from polymer residues over macroscopic areas (>1 cm(2)). The critical step in preparing such surfaces involves the use of an intermediate mica template, which itself is atomically smooth. We demonstrate the compatibility of these model surfaces with the surface force balance, opening up the possibility of measuring normal and lateral forces, including friction and adhesion, between two graphene sheets either in contact or across a liquid medium. The conductivity of the graphene surfaces allows forces to be measured while controlling the surface potential. This new apparatus, the graphene surface force balance, is expected to be of importance to the future understanding of graphene in applications from lubrication to electrochemical energy storage systems.
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