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Microscopic insight into the single step growth of in-plane heterostructures between graphene and hexagonal boron nitride

Research output: Contribution to journalArticle

  • Than Hai Nguyen
  • Daniele Perillli
  • Mattia Cattelan
  • Hongshen Liu
  • Francesco Sedona
  • Neil Fox
  • Cristiana Di Valentin
  • Stefano Agnoli
Original languageEnglish
Pages (from-to)675-682
Number of pages8
JournalNano Research
Volume12
Issue number3
Early online date9 Jan 2019
DOIs
DateAccepted/In press - 20 Dec 2018
DateE-pub ahead of print - 9 Jan 2019
DatePublished (current) - 1 Mar 2019

Abstract

Graphene-h-BN hybrid nanostructures are grown in one step on the Pt(111) surface by ultra-high vacuum chemical vapor deposition using a single precursor, the dimethylamino borane complex. By varying the deposition conditions, different nanostructures ranging from a fully continuous hybrid monolayer to well-separated Janus nanodots can be obtained. The growth starts with heterogeneous nucleation on morphological defects such as Pt step edges and proceeds by the addition of small clusters formed by the decomposition of the dimethylamino borane complex. Scanning tunneling microscopy measurements indicate that a sharp zigzag in-plane boundary is formed when graphene grows aligned with the Pt substrate and consequently with the h-BN layer as well. When graphene is rotated by 30°, the graphene armchair edges are seamlessly connected to h-BN zigzag edges. This is confirmed by a thorough density functional theory (DFT) study. Angle resolved photoemission spectroscopy (ARPES) data suggests that both h-BN and graphene present the typical electronic structure of self-standing non-interacting materials.

    Research areas

  • graphene, h-BN, heterostructures, scanning tunneling microscopy, density functional theory (DFT)

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  • Full-text PDF (accepted author manuscript)

    Rights statement: This is the author accepted manuscript (AAM). The final published version (version of record) is available online via Springer at https://link.springer.com/article/10.1007%2Fs12274-019-2276-0 . Please refer to any applicable terms of use of the publisher.

    Accepted author manuscript, 1 MB, PDF document

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