Synthesis of Regioisomeric Graphene Nanoribbon Junctions via Heteroprecursors

Kewei Sun, Ondrej Krejci, Adam S. Foster, Yasuhiro Okuda, Akihiro Orita, Shigeki Kawai*

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

1 Citation (Scopus)
69 Downloads (Pure)

Abstract

Graphene nanoribbons are one of the most promising materials for nanoscale electronics. While various structures have successfully been synthesized by on-surface reactions, curved connections remain less investigated, yet they could prove highly useful in the development of copolymerization technology. Here, we present the synthesis of three different regioisomeric junctions on Au (111) by using 10,10'-dibromo-9,9'-bianthryl and 1,3,6,8-tetrabromopyrene. The chemical structures and the electronic properties of junctions were studied with a combination of scanning tunneling microscopy with a CO terminated tip, scanning tunneling spectroscopy, and density functional theory calculations. We found that two identical nanoribbon-junction interface electronic states appear within the band gaps of connected graphene nanoribbons.

Original languageEnglish
Pages (from-to)17632-17638
Number of pages7
JournalJournal of Physical Chemistry C
Volume123
Issue number28
DOIs
Publication statusPublished - 18 Jul 2019
MoE publication typeA1 Journal article-refereed

Keywords

  • ON-SURFACE SYNTHESIS
  • TOTAL-ENERGY CALCULATIONS
  • BOTTOM-UP SYNTHESIS
  • BAND-GAP
  • ARMCHAIR
  • FABRICATION
  • MOLECULES

Equipment

Science-IT

Mikko Hakala (Manager)

School of Science

Facility/equipment: Facility

  • Cite this