Bottom-up, Robust Graphene Ribbon Electronics in All-Carbon Molecular Junctions
| Autor: | Richard L. McCreery, Mustafa Supur, Adam Johan Bergren, Colin Van Dyck |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
graphene electronics
Materials science molecular electronics chemistry.chemical_element 02 engineering and technology 010402 general chemistry 01 natural sciences law.invention Delocalized electron law Ribbon General Materials Science electron transport Graphene Molecular electronics Conductance graphene ribbons 021001 nanoscience & nanotechnology 0104 chemical sciences chemistry Covalent bond Chemical physics Electrode 0210 nano-technology molecular junction Carbon |
| Zdroj: | ACS Applied Materials & Interfaces. 10:6090-6095 |
| ISSN: | 1944-8252 1944-8244 |
| DOI: | 10.1021/acsami.7b19305 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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