4.7 Article

Evolution of ordered nanoporous phases during h-BN growth: controlling the route from gas-phase precursor to 2D material by in situ monitoring

Journal

NANOSCALE HORIZONS
Volume 7, Issue 11, Pages -

Publisher

ROYAL SOC CHEMISTRY
DOI: 10.1039/d2nh00353h

Keywords

-

Funding

  1. Austrian Science Fund (FWF) [P29641-N36, P34704]
  2. Doctoral School
  3. TU Graz
  4. EPSRC [EP/T00634X/1, EP/S029834/1, EP/R029431]
  5. Royal Society [URF/R/191029]
  6. Austrian Science Fund (FWF) [P29641, P34704] Funding Source: Austrian Science Fund (FWF)

Ask authors/readers for more resources

Utilizing helium atom scattering, the research discovered and controlled the growth of novel 2D h-BN nanoporous phases during the CVD process, revealing the formation of a metastable structure prior to h-BN formation and the emergence of a (3 x 4) structure.
Large-area single-crystal monolayers of two-dimensional (2D) materials such as graphene and hexagonal boron nitride (h-BN) can be grown by chemical vapour deposition (CVD). However, the high temperatures and fast timescales at which the conversion from a gas-phase precursor to the 2D material appears, make it extremely challenging to simultaneously follow the atomic arrangements. We utilise helium atom scattering to discover and control the growth of novel 2D h-BN nanoporous phases during the CVD process. We find that prior to the formation of h-BN from the gas-phase precursor, a metastable (3 x 3) structure is formed, and that excess deposition on the resulting 2D h-BN leads to the emergence of a (3 x 4) structure. We illustrate that these nanoporous structures are produced by partial dehydrogenation and polymerisation of the borazine precursor upon adsorption. These steps are largely unexplored during the synthesis of 2D materials and we unveil the rich phases during CVD growth. Our results provide significant foundations for 2D materials engineering in CVD, by adjusting or carefully controlling the growth conditions and thus exploiting these intermediate structures for the synthesis of covalent self-assembled 2D networks.

Authors

I am an author on this paper
Click your name to claim this paper and add it to your profile.

Reviews

Primary Rating

4.7
Not enough ratings

Secondary Ratings

Novelty
-
Significance
-
Scientific rigor
-
Rate this paper

Recommended

No Data Available
No Data Available