Well-defined sub-nanometer graphene ribbons synthesized inside carbon nanotubes
Autor: | Hans Kuzmany, Takeshi Saito, Wim Wenseleers, Jenő Kürti, Kecheng Cao, Gergő Kukucska, Lei Shi, János Koltai, Sofie Cambré, Thomas Pichler, Miles Martinati, Ute Kaiser |
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Jazyk: | angličtina |
Rok vydání: | 2021 |
Předmět: |
Raman scattering
Electronic structure Materials science Resonance profiles Albrecht theory Graphene nanoribbons GW calculation Band gap FOS: Physical sciences Nanotechnology 02 engineering and technology Carbon nanotube 010402 general chemistry 01 natural sciences law.invention symbols.namesake law General Materials Science Nanoscopic scale Condensed Matter - Materials Science Graphene Physics Materials Science (cond-mat.mtrl-sci) General Chemistry 021001 nanoscience & nanotechnology 0104 chemical sciences Characterization (materials science) Chemistry Quantum dot symbols 0210 nano-technology |
Zdroj: | Carbon |
ISSN: | 0008-6223 |
Popis: | 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 encapsulation of the so-obtained graphene nanoribbons is proved by atomic resolution electron microscopy, while their assignment is provided 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. Comment: 35 pages, 4 figures |
Databáze: | OpenAIRE |
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