Revealing the Electronic Structure of Silicon Intercalated Armchair Graphene Nanoribbons by Scanning Tunneling Spectroscopy.
- Deniz O Empa, Swiss Federal Laboratories for Materials Science and Technology , Überlandstrasse 129, CH-8600 Dübendorf, Switzerland.
- Sánchez-Sánchez C Empa, Swiss Federal Laboratories for Materials Science and Technology , Überlandstrasse 129, CH-8600 Dübendorf, Switzerland.
- Dumslaff T Max Planck Institute for Polymer Research , Ackermannweg 10, D-55128 Mainz, Germany.
- Feng X Chair of Molecular Functional Materials, Department of Chemistry and Food Chemistry, Technische Universität Dresden , Mommsenstrasse 4, D-01062 Dresden, Germany.
- Narita A Max Planck Institute for Polymer Research , Ackermannweg 10, D-55128 Mainz, Germany.
- Müllen K Max Planck Institute for Polymer Research , Ackermannweg 10, D-55128 Mainz, Germany.
- Kharche N Department of Physics, Applied Physics, and Astronomy, Rensselaer Polytechnic Institute , Troy, New York 12180, United States.
- Meunier V Department of Physics, Applied Physics, and Astronomy, Rensselaer Polytechnic Institute , Troy, New York 12180, United States.
- Fasel R Empa, Swiss Federal Laboratories for Materials Science and Technology , Überlandstrasse 129, CH-8600 Dübendorf, Switzerland.
- Ruffieux P Empa, Swiss Federal Laboratories for Materials Science and Technology , Überlandstrasse 129, CH-8600 Dübendorf, Switzerland.
- 2017-03-17
Published in:
- Nano letters. - 2017
Graphene nanoribbon
density functional theory
intercalation
scanning tunneling spectroscopy
screening
surface alloying
English
The electronic properties of graphene nanoribbons grown on metal substrates are significantly masked by the ones of the supporting metal surface. Here, we introduce a novel approach to access the frontier states of armchair graphene nanoribbons (AGNRs). The in situ intercalation of Si at the AGNR/Au(111) interface through surface alloying suppresses the strong contribution of the Au(111) surface state and allows for an unambiguous determination of the frontier electronic states of both wide and narrow band gap AGNRs. First-principles calculations provide insight into substrate induced screening effects, which result in a width-dependent band gap reduction for substrate-supported AGNRs. The strategy reported here provides a unique opportunity to elucidate the electronic properties of various kinds of graphene nanomaterials supported on metal substrates.
- Language
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- English
- Open access status
- green
- Identifiers
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- DOI 10.1021/acs.nanolett.6b04727
- PMID 28301723
- Persistent URL
- https://sonar.ch/global/documents/6075
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