Influence of copper crystal surface on the CVD growth of large area monolayer graphene

L. Zhao, K. T. Rim, H. Zhou, R. He, T. F. Heinz, A. Pinczuk, G. W. Flynn, A. N. Pasupathy

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Abstract

We study the influence of the surface structure of copper single crystals on the growth of large area monolayer graphene by chemical vapor deposition (CVD) in ultra-high vacuum (UHV). Using atomic-resolution scanning tunneling microscopy (STM), we find that graphene grows primarily in registry with the underlying copper lattice for both Cu(111) and Cu(100). The graphene has a hexagonal superstructure on Cu(111) with a significant electronic component,whereas it has a linear superstructure on Cu(100). Graphene on Cu(111) forms a microscopically uniform sheet, the quality of which is determined by the presence of grain boundaries where graphene grains with different orientations meet. Graphene grown on Cu(100) under similar conditions does not form a uniform sheet and instead displays exposed nanoscale edges. Our results indicate the importance of the copper crystal structure on the microstructure of graphene films produced by CVD.

Original languageEnglish
Pages (from-to)509-513
Number of pages5
JournalSolid State Communications
Volume151
Issue number7
DOIs
StatePublished - Apr 2011

Keywords

  • A. STM
  • B. Graphene

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    Zhao, L., Rim, K. T., Zhou, H., He, R., Heinz, T. F., Pinczuk, A., Flynn, G. W., & Pasupathy, A. N. (2011). Influence of copper crystal surface on the CVD growth of large area monolayer graphene. Solid State Communications, 151(7), 509-513. https://doi.org/10.1016/j.ssc.2011.01.014