On-Surface Synthesis of NBN-Doped Zigzag-Edged Graphene Nanoribbons

Publikation: Beitrag in FachzeitschriftForschungsartikelBeigetragenBegutachtung

Beitragende

Abstract

We report the first bottom-up synthesis of NBN-doped zigzag-edged GNRs (NBN-ZGNR1 and NBN-ZGNR2) through surface-assisted polymerization and cyclodehydrogenation based on two U-shaped molecular precursors with an NBN unit preinstalled at the zigzag edge. The resultant zigzag-edge topologies of GNRs are elucidated by high-resolution scanning tunneling microscopy (STM) in combination with noncontact atomic force microscopy (nc-AFM). Scanning tunneling spectroscopy (STS) measurements and density functional theory (DFT) calculations reveal that the electronic structures of NBN-ZGNR1 and NBN-ZGNR2 are significantly different from those of their corresponding pristine fully-carbon-based ZGNRs. Additionally, DFT calculations predict that the electronic structures of NBN-ZGNRs can be further tailored to be gapless and metallic through one-electron oxidation of each NBN unit into the corresponding radical cations. This work reported herein provides a feasible strategy for the synthesis of GNRs with stable zigzag edges yet tunable electronic properties.

Details

OriginalspracheEnglisch
Seiten (von - bis)8873-8879
Seitenumfang7
FachzeitschriftAngewandte Chemie - International Edition
Jahrgang59
Ausgabenummer23
PublikationsstatusVeröffentlicht - 2 Juni 2020
Peer-Review-StatusJa

Externe IDs

PubMed 32134547

Schlagworte

ASJC Scopus Sachgebiete

Schlagwörter

  • graphene nanoribbons, NBN doping, on-surface synthesis, radical cations, zigzag edges