Self-assembly of ordered graphene nanodot arrays.

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 moiré-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.The nanoscale patterning of two-dimensional materials offers the possibility of novel optoelectronic properties; however, it remains challenging. Here, Camilli et al. show the self-assembly of large arrays of highly-uniform graphene dots imbedded in a BCN matrix, enabling novel devices.

journal_name

Nat Commun

journal_title

Nature communications

authors

Camilli L,Jørgensen JH,Tersoff J,Stoot AC,Balog R,Cassidy A,Sadowski JT,Bøggild P,Hornekær L

doi

10.1038/s41467-017-00042-4

subject

Has Abstract

pub_date

2017-06-29 00:00:00

pages

47

issue

1

issn

2041-1723

pii

10.1038/s41467-017-00042-4

journal_volume

8

pub_type

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