Selecting a single orientation for millimeter sized graphene sheets

Gastel van, R. and N'Diaye, A.T. and Wall, D. and Coraux, J. and Busse, C. and Buckanie, N.M. and Meyer zu Heringdorf, F.-J. and Horn von Hoegen, M. and Michely, T. and Poelsema, B. (2009) Selecting a single orientation for millimeter sized graphene sheets. Applied Physics Letters, 95 (12). p. 121901. ISSN 0003-6951

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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.
Item Type:	Article
Copyright:	© 2009 American Institute of Physics
Faculty:	Science and Technology (TNW)
Research Group:	Physics of Interfaces and Nanomaterials (PIN)
Link to this item:	http://purl.utwente.nl/publications/73219
Official URL:	http://dx.doi.org/10.1063/1.3225554
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