• 文献标题:   Self-assembly of ordered graphene nanodot arrays
  • 文献类型:   Article
  • 作  者:   CAMILLI L, JORGENSEN JH, TERSOFF J, STOOT AC, BALOG R, CASSIDY A, SADOWSKI JT, BOGGILD P, HORNEKAER L
  • 作者关键词:  
  • 出版物名称:   NATURE COMMUNICATIONS
  • ISSN:   2041-1723
  • 通讯作者地址:   Tech Univ Denmark
  • 被引频次:   11
  • DOI:   10.1038/s41467-017-00042-4
  • 出版年:   2017

▎ 摘  要

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.