Sub-5 nm, globally aligned graphene nanoribbons on Ge(001)

Brian Kiraly, Andrew J. Mannix, Robert M. Jacobberger, Brandon L. Fisher, Michael S. Arnold, Mark C. Hersam*, Nathan P. Guisinger

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

31 Scopus citations


Graphene nanoribbons (GNRs) hold great promise for future electronics because of their edge and width dependent electronic bandgaps and exceptional transport properties. While significant progress toward GNR devices has been made, the field has been limited by difficulties achieving narrow widths, global alignment, and atomically pristine GNR edges on technologically relevant substrates. A recent advance has challenged these limits by using Ge(001) substrates to direct the bottom-up growth of GNRs with nearly pristine armchair edges and widths near ∼10 nm via atmospheric pressure chemical vapor deposition. In this work, the growth of GNRs on Ge(001) is extended to ultra-high vacuum conditions, resulting in the realization of GNRs with widths narrower than 5 nm. Armchair graphene nanoribbons oriented along Ge 〈110〉 surface directions are achieved with excellent width control and relatively large bandgaps. The bandgap magnitude and electronic uniformity of these sub-5 nm GNRs are well-suited for emerging nanoelectronic applications.

Original languageEnglish (US)
Article number213101
JournalApplied Physics Letters
Issue number21
StatePublished - May 23 2016

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)


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