Bottom-up Synthesis and Characterization of Porous 12-Atom-Wide Armchair Graphene Nanoribbons,Nano Letters

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Bottom-up Synthesis and Characterization of Porous 12-Atom-Wide Armchair Graphene Nanoribbons
Nano Letters ( IF 9.6 ) Pub Date : 2024-08-26 , DOI: 10.1021/acs.nanolett.4c01106
Qitang Fan _{1,

2} , Zilin Ruan ₁ , Simon Werner ₁ , Tim Naumann ₁ , Rustem Bolat _{3,

4,

5,

6} , Jose Martinez-Castro _{3,

4} , Tabea Koehler ₁ , Tobias Vollgraff ₁ , Wolfgang Hieringer ₇ , Raviraj Mandalia ₇ , Christian Neiß ₇ , Andreas Görling ₇ , F Stefan Tautz _{3,

5,

6} , Jörg Sundermeyer ₁ , J Michael Gottfried ₁

Affiliation

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.

中文翻译：

多孔12原子宽扶手椅石墨烯纳米带的自下而上合成与表征

尽管已经制备了几种多孔碳/石墨烯纳米带（GNR），但仍然缺乏无孔 GNR 与其周期性穿孔对应物之间电子特性的直接比较。在这里，我们报告了通过分层乌尔曼和脱氢偶联，从 Au(111) 表面上的溴芳烃前体合成了多孔 12 原子宽扶手椅边缘 GNR。通过热力学和动力学反应控制与定制前驱体设计相结合，实现了多孔 12-GNR 的选择性形成。通过扫描隧道显微镜/光谱学和密度泛函理论计算阐明了多孔12-GNR的结构和电子性质，表明与同一表面上的无孔12-AGNR相比，孔引起2.17 eV带隙增加。

更新日期：2024-08-26

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