Molecular beam growth of graphene nanocrystals on dielectric substrates

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. Garcia

Research output: Contribution to journalArticle

26 Scopus citations

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.

Original languageEnglish
Pages (from-to)4822-4829
Number of pages8
JournalCarbon
Volume50
Issue number13
DOIs
StatePublished - Nov 2012

Fingerprint Dive into the research topics of 'Molecular beam growth of graphene nanocrystals on dielectric substrates'. Together they form a unique fingerprint.

  • Cite this

    Wurstbauer, U., Schiros, T., Jaye, C., Plaut, A. S., He, R., Rigosi, A., Gutiérrez, C., Fischer, D., Pfeiffer, L. N., Pasupathy, A. N., Pinczuk, A., & Garcia, J. M. (2012). Molecular beam growth of graphene nanocrystals on dielectric substrates. Carbon, 50(13), 4822-4829. https://doi.org/10.1016/j.carbon.2012.06.008