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  • Title: Bottom-up Synthesis and Characterization of Porous 12-Atom-Wide Armchair Graphene Nanoribbons.
    Author: Fan Q, Ruan Z, Werner S, Naumann T, Bolat R, Martinez-Castro J, Koehler T, Vollgraff T, Hieringer W, Mandalia R, Neiß C, Görling A, Tautz FS, Sundermeyer J, Gottfried JM.
    Journal: Nano Lett; 2024 Sep 04; 24(35):10718-10723. PubMed ID: 39185821.
    Abstract:
    Although several porous carbon/graphene nanoribbons (GNRs) have been prepared, a direct comparison of the electronic properties between a nonporous GNR and its periodically perforated counterpart is still missing. Here, we report the synthesis of porous 12-atom-wide armchair-edged GNRs from a bromoarene precursor on a Au(111) surface via hierarchical Ullmann and dehydrogenative coupling. The selective formation of porous 12-GNRs was achieved through thermodynamic and kinetic reaction control combined with tailored precursor design. The structure and electronic properties of the porous 12-GNR were elucidated by scanning tunneling microscopy/spectroscopy and density functional theory calculations, revealing that the pores induce a 2.17 eV band gap increase compared to the nonporous 12-AGNR on the same surface.
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