Quantum Dots in Graphene Nanoribbons
Wang S, Kharche N, Girao EC, Feng X, Muellen K, Meunier V, Fasel R, Ruffieux P (2017)
Publication Type: Journal article
Publication year: 2017
Journal
Book Volume: 17
Pages Range: 4277-4283
Journal Issue: 7
DOI: 10.1021/acs.nanolett.7b01244
Abstract
Graphene quantum dots (GQDs) hold great promise for applications in electronics, optoelectronics, and bioelectronics, but the fabrication of widely tunable GQDs has remained elusive. Here, we report the fabrication of atomically precise GQDs consisting of low-bandgap N = 14 armchair graphene nanoribbon (AGNR) segments that are achieved through edge fusion of N = 7 AGNRs. The so-formed intraribbon GQDs reveal deterministically defined, atomically sharp interfaces between wide and narrow AGNR segments and host a pair of low-lying interface states. Scanning tunneling microscopy/spectroscopy measurements complemented by extensive simulations reveal that their energy splitting depends exponentially on the length of the central narrow bandgap segment. This allows tuning of the fundamental gap of the GQDs over 1 order of magnitude within a few nanometers length range. These results are expected to pave the way for the development of widely tunable intraribbon GQD-based devices.
Involved external institutions
Eidgenössische Materialprüfungs- und Forschungsanstalt (Empa) / Swiss Federal Laboratories for Materials Science & Technology
Switzerland (CH)
Rensselaer Polytechnic Institute (RPI)
United States (USA) (US)
Federal University of Piauí / Universidade Federal do Piauí (UFPI)
Brazil (BR)
Technische Universität Dresden
Germany (DE)
Max-Planck-Institut für Polymerforschung (MPI-P) / Max Planck Institute for Polymer Research
Germany (DE)
Switzerland (CH)
Rensselaer Polytechnic Institute (RPI)
United States (USA) (US)
Federal University of Piauí / Universidade Federal do Piauí (UFPI)
Brazil (BR)
Technische Universität Dresden
Germany (DE)
Max-Planck-Institut für Polymerforschung (MPI-P) / Max Planck Institute for Polymer Research
Germany (DE)
How to cite
APA:
Wang, S., Kharche, N., Girao, E.C., Feng, X., Muellen, K., Meunier, V.,... Ruffieux, P. (2017). Quantum Dots in Graphene Nanoribbons. Nano Letters, 17(7), 4277-4283. https://doi.org/10.1021/acs.nanolett.7b01244
MLA:
Wang, Shiyong, et al. "Quantum Dots in Graphene Nanoribbons." Nano Letters 17.7 (2017): 4277-4283.
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