Self-assembly of ordered graphene nanodot arrays

Luca Camilli*, Jakob H. Jorgensen, Jerry Tersoff, Adam C. Stoot, Richard Balog, Andrew Cassidy, Jerzy T. Sadowski, Peter Boggild, Liv Hornekaer

*Corresponding author for this work

Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaperJournal articleResearchpeer-review

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Abstract

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
Issue1
Number of pages9
ISSN2041-1723
DOIs
Publication statusPublished - 29 Jun 2017

Keywords

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

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