Self-assembly of ordered graphene nanodot arrays

Publication: Research - peer-reviewJournal article

DOI

  • Luca Camilli
    Luca CamilliTechnical University of Denmark
  • Jakob H. Jorgensen
  • Jerry Tersoff
    Jerry TersoffInternational Business Machines (IBM)
  • Adam C. Stoot
    Adam C. StootTechnical University of Denmark
  • Richard Balog
  • Andrew Cassidy
  • Jerzy T. Sadowski
    Jerzy T. SadowskiPacific NW Natl Lab, Pacific Northwest National Laboratory, United States Department of Energy (DOE)
  • Peter Boggild
    Peter BoggildTechnical University of Denmark
  • Liv Hornekaer

The ability to fabricate nanoscale domains of uniform size in two-dimensional materials could potentially enable new applications in nanoelectronics and the development of innovative metamaterials. However, achieving even minimal control over the growth of two-dimensional lateral heterostructures at such extreme dimensions has proven exceptionally challenging. Here we show the spontaneous formation of ordered arrays of graphene nano-domains (dots), epitaxially embedded in a two-dimensional boron-carbon-nitrogen alloy. These dots exhibit a strikingly uniform size of 1.6 +/- 0.2 nm and strong ordering, and the array periodicity can be tuned by adjusting the growth conditions. We explain this behaviour with a model incorporating dot-boundary energy, a moire-modulated substrate interaction and a long-range repulsion between dots. This new two-dimensional material, which theory predicts to be an ordered composite of uniform-size semiconducting graphene quantum dots laterally integrated within a larger-bandgap matrix, holds promise for novel electronic and optoelectronic properties, with a variety of potential device applications.

Original languageEnglish
Article number47
JournalNature Communications
Volume8
Number of pages9
ISSN2041-1723
DOIs
StatePublished - 29 Jun 2017

    Keywords

  • HEXAGONAL BORON-NITRIDE, B-C-N, ATOMIC LAYERS, HETEROSTRUCTURES, GROWTH, CARBON, NITROGEN, IR(111), TRANSITION, INTERFACE

See relations at Aarhus University Citationformats

ID: 114838274