Faculty Publications

Title

Molecular beam growth of graphene nanocrystals on dielectric substrates

Document Type

Article

Journal/Book/Conference Title

Carbon

Volume

50

Issue

13

First Page

4822

Last Page

4829

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 sp 2 hybridized hexagonal carbon lattice in the nanocrystals. Lower growth rates (below 0.5 /min) favor the formation of layered, larger size multi-layer graphene crystallites (up to 22 nm) on all investigated substrates. The surface morphology is determined by the roughness of the underlying substrate (RMS ∼8 ) and graphitic monolayer steps are observed by ambient scanning tunneling microscopy. © 2012 Elsevier Ltd. All rights reserved.

Original Publication Date

11-1-2012

DOI of published version

10.1016/j.carbon.2012.06.008

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