Well-defined sub-nanometer graphene ribbons synthesized inside carbon nanotubes

Autor(en)

Hans Kuzmany, Lei Shi, Miles Martinati, Sofie Cambré, Wim Wenseleers, Jenő Kürti, János Koltai, Gergő Kukucska, Kecheng Cao, Ute Kaiser, Takeshi Saito, Thomas Pichler

Abstrakt

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.

Organisation(en)

Elektronische Materialeigenschaften

Externe Organisation(en)

Sun Yat-sen University, University of Antwerp, Eötvös Loránd University Budapest, Universität Ulm, National Institute of Advanced Industrial Science and Technology (AIST)

Journal

Carbon

Band

171

Seiten

221-229

Anzahl der Seiten

9

ISSN

0008-6223

DOI

https://doi.org/10.1016/j.carbon.2020.08.065

Publikationsdatum

01-2021

Peer-reviewed

Ja

ÖFOS 2012

103018 Materialphysik

Schlagwörter

ASJC Scopus Sachgebiete

Allgemeine Chemie, Allgemeine Materialwissenschaften

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/7b485f3f-36c4-4f63-b636-2779e33a2e11