Revealing the Electronic Structure of Silicon Intercalated Armchair Graphene Nanoribbons by Scanning Tunneling Spectroscopy

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...

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Published inNano letters Vol. 17; no. 4; pp. 2197 - 2203
Main Authors Deniz, Okan, Sánchez-Sánchez, Carlos, Dumslaff, Tim, Feng, Xinliang, Narita, Akimitsu, Müllen, Klaus, Kharche, Neerav, Meunier, Vincent, Fasel, Roman, Ruffieux, Pascal
Format Journal Article
LanguageEnglish
Published United States American Chemical Society 12.04.2017
Subjects
surface alloying
scanning tunneling spectroscopy
screening
intercalation
Graphene nanoribbon
density functional theory
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Abstract 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.
AbstractList 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.
Author Kharche, Neerav
Feng, Xinliang
Fasel, Roman
Deniz, Okan
Narita, Akimitsu
Ruffieux, Pascal
Sánchez-Sánchez, Carlos
Dumslaff, Tim
Meunier, Vincent
Müllen, Klaus
AuthorAffiliation Max Planck Institute for Polymer Research
Technische Universität Dresden
Applied Physics, and Astronomy, Rensselaer Polytechnic Institute
University of Bern
Empa, Swiss Federal Laboratories for Materials Science and Technology
Chair of Molecular Functional Materials, Department of Chemistry and Food Chemistry
Department of Chemistry and Biochemistry
Department of Physics
AuthorAffiliation_xml – name: Chair of Molecular Functional Materials, Department of Chemistry and Food Chemistry
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– name: Max Planck Institute for Polymer Research
– name: Technische Universität Dresden
– name: Department of Physics
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– name: Applied Physics, and Astronomy, Rensselaer Polytechnic Institute
– name: Department of Chemistry and Biochemistry
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  givenname: Okan
  orcidid: 0000-0001-8634-8849
  surname: Deniz
  fullname: Deniz, Okan
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  givenname: Carlos
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  surname: Sánchez-Sánchez
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  organization: Empa, Swiss Federal Laboratories for Materials Science and Technology
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  organization: Max Planck Institute for Polymer Research
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  organization: Technische Universität Dresden
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  organization: Applied Physics, and Astronomy, Rensselaer Polytechnic Institute
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  organization: Applied Physics, and Astronomy, Rensselaer Polytechnic Institute
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  surname: Ruffieux
  fullname: Ruffieux, Pascal
  email: pascal.ruffieux@empa.ch
  organization: Empa, Swiss Federal Laboratories for Materials Science and Technology
BackLink https://www.ncbi.nlm.nih.gov/pubmed/28301723$$D View this record in MEDLINE/PubMed
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Keywords surface alloying
scanning tunneling spectroscopy
screening
intercalation
Graphene nanoribbon
density functional theory
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Snippet The electronic properties of graphene nanoribbons grown on metal substrates are significantly masked by the ones of the supporting metal surface. Here, we...
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Title Revealing the Electronic Structure of Silicon Intercalated Armchair Graphene Nanoribbons by Scanning Tunneling Spectroscopy
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