Bottom-up, Robust Graphene Ribbon Electronics in All-Carbon
Molecular Junctions
Author(s):
Mustafa Supur, Colin Van Dyck, Adam Johan Bergren, Richard L. McCreery
Journal:
ACS Applied Materials & Interfaces
Year:
2018
Volume:
10
Pages
6090-6095
DOI:
10.1021/acsami.7b19305
Abstract:
arge-area molecular electronic junctions consist- ing of 5-carbon wide graphene ribbons (GR) with lengths of 2− 12 nm between carbon electrodes were fabricated by electro- chemical reduction of diazotized 1,8-diaminonaphthalene. Their conductance greatly exceeds that observed for other molecular junctions of similar thicknesses, by a factor of >1 × 104 compared to polyphenylenes and >1 × 107 compared to alkane chains. The remarkable increase of conductance of the GR nanolayer results from (i) uninterrupted planarity of fused-arene structure affording extensive π-electron delocalization and (ii) enhanced electronic coupling of molecular layer with the carbon bottom contact by two-point covalent bonding, in agreement with DFT- based simulations.