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Abstract
Graphene nanoribbons with sub-nanometer widths are extremely interesting for nanoscale electronics and devices as they combine the unusual transport properties of graphene with the opening of a band gap due to quantum confinement in the lateral dimension. Strong research efforts are presently paid to grow such nanoribbons. Here we show the synthesis of 6- and 7-armchair graphene nanoribbons, with widths of 0.61 and 0.74 nm, and excitonic gaps of 1.83 and 2.18 eV, by high-temperature vacuum annealing of ferrocene molecules inside single-walled carbon nanotubes. The growth of the so-obtained graphene nanoribbons is evidenced from atomic resolution electron microscopy, while their well-defined structure is identified by a combination of an extensive wavelength-dependent Raman scattering characterization and quantum-chemical calculations. These findings enable a facile and scalable approach leading to the controlled growth and detailed analysis of well-defined sub-nanometer graphene nanoribbons. (C) 2020 Elsevier Ltd. All rights reserved.
Original language | English |
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Pages (from-to) | 221-229 |
Number of pages | 9 |
Journal | Carbon |
Volume | 171 |
DOIs | |
Publication status | Published - Jan 2021 |
Austrian Fields of Science 2012
- 103018 Materials physics
Keywords
- Graphene nanoribbons
- Electronic structure
- Raman scattering
- Resonance profiles
- Albrecht theory
- GW calculation
Projects
- 1 Finished