Selecting a single orientation for millimeter sized graphene sheets

Raoul van Gastel, A.T. N'diaye, D Wall, J Coraux, C Busse, N.M. Buckanie, F.J. Meyer zu Heringdorf, M. Horn-von-Hoegen, T. Michely, Bene Poelsema

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Abstract

We have used low energy electron microscopy and photo emission electron microscopy to study and improve the quality of graphene films grown on Ir(111) using chemical vapor deposition (CVD). CVD at elevated temperature already yields graphene sheets that are uniform and of monatomic thickness. Besides domains that are aligned with respect to the substrate, other rotational variants grow. Cyclic growth exploiting the faster growth and etch rates of the rotational variants, yields films that are 99% composed of aligned domains. Precovering the substrate with a high density of graphene nuclei prior to CVD yields pure films of aligned domains extending over millimeters. Such films can be used to prepare cluster-graphene hybrid materials for catalysis or nanomagnetism and can potentially be combined with lift-off techniques to yield high-quality, graphene based, electronic devices.
Original languageUndefined
Pages (from-to)121901-
JournalApplied physics letters
Volume95
Issue number12
DOIs
Publication statusPublished - 2009

Keywords

  • METIS-262672
  • IR-73219

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