Direct oriented growth of armchair graphene nanoribbons on germanium

Robert M. Jacobberger, Brian Kiraly, Matthieu Fortin-Deschenes, Pierre L. Levesque, Kyle M. McElhinny, Gerald J. Brady, Richard Rojas Delgado, Susmit Singha Roy, Andrew Mannix, Max G. Lagally, Paul G. Evans, Patrick Desjardins, Richard Martel, Mark C. Hersam, Nathan P. Guisinger and Michael S. Arnold ()
Additional contact information
Robert M. Jacobberger: University of Wisconsin-Madison
Brian Kiraly: Center for Nanoscale Materials, Argonne National Laboratory
Matthieu Fortin-Deschenes: École Polytechnique de Montréal
Pierre L. Levesque: Université de Montréal
Kyle M. McElhinny: University of Wisconsin-Madison
Gerald J. Brady: University of Wisconsin-Madison
Richard Rojas Delgado: University of Wisconsin-Madison
Susmit Singha Roy: University of Wisconsin-Madison
Andrew Mannix: Center for Nanoscale Materials, Argonne National Laboratory
Max G. Lagally: University of Wisconsin-Madison
Paul G. Evans: University of Wisconsin-Madison
Patrick Desjardins: École Polytechnique de Montréal
Richard Martel: Université de Montréal
Mark C. Hersam: Northwestern University
Nathan P. Guisinger: Center for Nanoscale Materials, Argonne National Laboratory
Michael S. Arnold: University of Wisconsin-Madison

Nature Communications, 2015, vol. 6, issue 1, 1-8

Abstract: Abstract Graphene can be transformed from a semimetal into a semiconductor if it is confined into nanoribbons narrower than 10 nm with controlled crystallographic orientation and well-defined armchair edges. However, the scalable synthesis of nanoribbons with this precision directly on insulating or semiconducting substrates has not been possible. Here we demonstrate the synthesis of graphene nanoribbons on Ge(001) via chemical vapour deposition. The nanoribbons are self-aligning 3° from the Ge〈110〉 directions, are self-defining with predominantly smooth armchair edges, and have tunable width to 70. In order to realize highly anisotropic ribbons, it is critical to operate in a regime in which the growth rate in the width direction is especially slow,

Date: 2015
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DOI: 10.1038/ncomms9006

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