Bottom-up, robust graphene ribbon electronics in all-carbon molecular junctions

From National Research Council Canada

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DOIResolve DOI: https://doi.org/10.1021/acsami.7b19305
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  1. National Research Council of Canada. Nanotechnology
FormatText, Article
Journal titleACS Applied Materials and Interfaces
ISSN1944-8244
1944-8252
Volume10
Issue7
Pages6090–6095
Subjectelectron transport; graphene electronics; graphene ribbons; molecular electronics; molecular junction
Abstract
Large-area molecular electronic junctions consisting of 5-carbon wide graphene ribbons (GR) with lengths of 2–12 nm between carbon electrodes were fabricated by electrochemical 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.
Publication date
PublisherAmerican Chemical Society
LanguageEnglish
Peer reviewedYes
NPARC number23002788
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Record created2018-02-27
Record modified2020-05-30
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