Aligning the Band Gap of Graphene Nanoribbons by Monomer Doping

Authors

  • Christopher Bronner,

    Corresponding author
    1. Fachbereich Physik, Freie Universität Berlin, Arnimallee 14, 14195 Berlin (Germany)
    • Christopher Bronner, Fachbereich Physik, Freie Universität Berlin, Arnimallee 14, 14195 Berlin (Germany)===

      Stefan Hecht, Department of Chemistry, Humboldt-Universität zu Berlin, Brook-Taylor-Straße 2, 12489 Berlin (Germany)===

      Petra Tegeder, Fachbereich Physik, Freie Universität Berlin, Arnimallee 14, 14195 Berlin (Germany)===

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  • Stephan Stremlau,

    1. Fachbereich Physik, Freie Universität Berlin, Arnimallee 14, 14195 Berlin (Germany)
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  • Dr. Marie Gille,

    1. Department of Chemistry, Humboldt-Universität zu Berlin, Brook-Taylor-Straße 2, 12489 Berlin (Germany)
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  • Felix Brauße,

    1. Department of Chemistry, Humboldt-Universität zu Berlin, Brook-Taylor-Straße 2, 12489 Berlin (Germany)
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  • Anton Haase,

    1. Fachbereich Physik, Freie Universität Berlin, Arnimallee 14, 14195 Berlin (Germany)
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  • Prof. Dr. Stefan Hecht,

    Corresponding author
    1. Department of Chemistry, Humboldt-Universität zu Berlin, Brook-Taylor-Straße 2, 12489 Berlin (Germany)
    • Christopher Bronner, Fachbereich Physik, Freie Universität Berlin, Arnimallee 14, 14195 Berlin (Germany)===

      Stefan Hecht, Department of Chemistry, Humboldt-Universität zu Berlin, Brook-Taylor-Straße 2, 12489 Berlin (Germany)===

      Petra Tegeder, Fachbereich Physik, Freie Universität Berlin, Arnimallee 14, 14195 Berlin (Germany)===

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  • Prof. Dr. Petra Tegeder

    Corresponding author
    1. Fachbereich Physik, Freie Universität Berlin, Arnimallee 14, 14195 Berlin (Germany)
    2. Physikalisch-Chemisches Institut, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 253, 69120 Heidelberg (Germany)
    • Christopher Bronner, Fachbereich Physik, Freie Universität Berlin, Arnimallee 14, 14195 Berlin (Germany)===

      Stefan Hecht, Department of Chemistry, Humboldt-Universität zu Berlin, Brook-Taylor-Straße 2, 12489 Berlin (Germany)===

      Petra Tegeder, Fachbereich Physik, Freie Universität Berlin, Arnimallee 14, 14195 Berlin (Germany)===

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  • We gratefully acknowledge funding by the Focus Area Nanoscale at the Freie Universität Berlin, the German Research Foundation (DFG) through collaborative research center Sfb658, the European Union via the AtMol project, and the European Science Foundation via P2M. M.G. is indebted to the Fonds der chemischen Industrie for providing a Kekulé doctoral fellowship.

Abstract

original image

A matter of doping: Graphene nanoribbons (GNRs) were generated through an on-surface bottom-up synthesis and selectively doped at their edges by introducing nitrogen atoms in the precursor monomers. While the size of the band gap of 2.8 eV remains almost unchanged upon N substitution, a linear shift of the band structure is observed and corresponds to n-type doping (see picture; CB=conduction band and VB=valence band).

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