Counting molecular-beam grown graphene layers

Annette S. Plaut, Ulrich Wurstbauer, Aron Pinczuk, Jorge M. Garcia, Loren N. Pfeiffer

Research output: Contribution to journalArticlepeer-review

3 Scopus citations


We have used the ratio of the integrated intensity of graphene's Raman G peak to that of the silicon substrate's first-order optical phonon peak, accurately to determine the number of graphene layers across our molecular-beam (MB) grown graphene films. We find that these results agree well both, with those from our own exfoliated single and few-layer graphene flakes, and with the results of Koh [ACS Nano 5, 269 (2011)]. We hence distinguish regions of single-, bi-, tri-, four-layer, etc., graphene, consecutively, as we scan coarsely across our MB-grown graphene. This is the first, but crucial, step to being able to grow, by such molecular-beam-techniques, a specified number of large-area graphene layers, to order.

Original languageEnglish (US)
Article number241905
JournalApplied Physics Letters
Issue number24
StatePublished - Jun 17 2013
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)


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