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Elsevier, Carbon, 13(50), p. 4822-4829, 2012

DOI: 10.1016/j.carbon.2012.06.008

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Molecular beam growth of graphene nanocrystals on dielectric substrates

Journal article published in 2012 by Ulrich Wurstbauer, Theanne Schiros, Cherno Jaye, Annette S. Plaut, Rui He, Albert Rigosi, Christopher Gutiérrez, Daniel Fischer, Loren N. Pfeiffer, Abhay N. Pasupathy, Aron Pinczuk, Jorge M. García ORCID
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This paper is available in a repository.

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Abstract

We demonstrate the growth of graphene nanocrystals by molecular beam methods that employ a solid carbon source, and that can be used on a diverse class of large area dielectric substrates. Characterization by Raman and Near Edge X-ray Absorption Fine Structure spectroscopies reveal a sp2 hybridized hexagonal carbon lattice in the nanocrystals. Lower growth rates favor the formation of higher quality, larger size multi-layer graphene crystallites on all investigated substrates. The surface morphology is determined by the roughness of the underlying substrate and graphitic monolayer steps are observed by ambient scanning tunneling microscopy. ; Comment: Accepted in Carbon; Discussion section added; 20 pages, 6 figures (1 updated)