Premium
On‐Surface Synthesis of Nitrogen‐Doped Kagome Graphene
Author(s) -
Pawlak Rémy,
Liu Xunshan,
Ninova Silviya,
D'Astolfo Philipp,
Drechsel Carl,
Liu JungChing,
Häner Robert,
Decurtins Silvio,
Aschauer Ulrich,
Liu ShiXia,
Meyer Ernst
Publication year - 2021
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.202016469
Subject(s) - graphene , scanning tunneling microscope , doping , materials science , density functional theory , nanotechnology , fermi level , substrate (aquarium) , superconductivity , band gap , condensed matter physics , graphene nanoribbons , chemical physics , chemistry , computational chemistry , physics , optoelectronics , quantum mechanics , oceanography , geology , electron
Nitrogen‐doped Kagome graphene (N‐KG) has been theoretically predicted as a candidate for the emergence of a topological band gap as well as unconventional superconductivity. However, its physical realization still remains very elusive. Here, we report on a substrate‐assisted reaction on Ag(111) for the synthesis of two‐dimensional graphene sheets possessing a long‐range honeycomb Kagome lattice. Low‐temperature scanning tunneling microscopy (STM) and atomic force microscopy (AFM) with a CO‐terminated tip supported by density functional theory (DFT) are employed to scrutinize the structural and electronic properties of the N‐KG down to the atomic scale. We demonstrate its semiconducting character due to the nitrogen doping as well as the emergence of Kagome flat bands near the Fermi level which would open new routes towards the design of graphene‐based topological materials.