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나노 구조 물리 연구단
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Significant enhancement of the electrical transport properties of graphene films by controlling the surface roughness of Cu foils before and during chemical vapor deposition

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Title
Significant enhancement of the electrical transport properties of graphene films by controlling the surface roughness of Cu foils before and during chemical vapor deposition
Author(s)
Dongmok Lee; Kwon G.D.; Jung Ho Kim; Moyen E.; Young Hee Lee; Seunghyun Baik; Pribat D.
Publication Date
2014-11
Journal
NANOSCALE, v.6, no.21, pp.12943 - 12951
Publisher
ROYAL SOC CHEMISTRY
Abstract
We have studied the influence of the surface roughness of copper foils on the sheet resistance of graphene sheets grown by chemical vapor deposition. The surface roughness of the copper foils was reproducibly controlled by electropolishing. We have found that the graphene sheet resistance monotonically decreases as the surface roughness of the copper foils decreases. We show that a pre-annealing treatment combined with an optimized electropolishing process of the Cu foils and a fast CVD growth prevents the evolution of the Cu surface roughness during graphene synthesis. This combination of fabrication conditions produces small grain polycrystalline graphene films with a sheet resistance of 210 Ω □−1 and carrier mobility values as high as 5450 cm2 V−1 s−1 after transfer onto SiO2/Si.
URI
https://pr.ibs.re.kr/handle/8788114/865
ISSN
2040-3364
Appears in Collections:
Center for Integrated Nanostructure Physics(나노구조물리 연구단) > Journal Papers (저널논문)
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