Ultrathin graphdiyne film on graphene through solution-phase van der Waals epitaxy.

ABSTRACT: Graphdiyne (GDY) is an ordered two-dimensional (2D) carbon allotrope comprising sp- and sp²-hybridized carbon atoms with high degrees of π-conjugation, which features a natural band gap and superior electric properties. However, the synthesis of one- or few-layer GDY remains challenging because of the free rotation around alkyne-aryl single bonds and the lack of thickness control. We report the facile synthesis of an ultrathin single-crystalline GDY film on graphene through a solution-phase van der Waals epitaxial strategy. The weak admolecule-substrate interaction at the heterojunction drastically relaxes the large lattice mismatch between GDY and graphene. It allows the fast in-plane coupling of admolecules and slow out-of-plane growth toward the formation of an incommensurate

SUBMITTER: Gao X 

PROVIDER: S-EPMC6035041 | biostudies-literature | 2018 Jul

REPOSITORIES: biostudies-literature