Heterostructures through Divergent Edge Reconstruction in Nitrogen-Doped Segmented Graphene Nanoribbons
Heterostructures through Divergent Edge Reconstruction in Nitrogen-Doped Segmented Graphene Nanoribbons
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DOI：
10.1002/chem.201603497
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发表时间：
2016-09-05
影响因子：
4.3
通讯作者：
Fischer, Felix R.
中科院分区：
文献类型：
--
作者：
Marangoni, Tomas;Haberer, Danny;Fischer, Felix R.
对单个石墨烯纳米带(GNR)中定义的片段进行原子精密工程是开发先进功能器件架构的关键使能技术。本文报道了由9-甲基-9H-咔唑衍生的活性官能团修饰的人字形GNRs的自下而上合成。扫描隧道和非接触原子力显微镜显示，GNRs的热激活导致富电子的咔唑重排成缺电子的菲啶。咔唑取代的人字形GNRs的选择性化学边缘重建是从单个分子前体控制制备空间定义的GNR异质结构的一种实用策略。
Atomically precise engineering of defined segments within individual graphene nanoribbons (GNRs) represents a key enabling technology for the development of advanced functional device architectures. Here, the bottom-up synthesis of chevron GNRs decorated with reactive functional groups derived from 9-methyl-9H-carbazole is reported. Scanning tunneling and non-contact atomic force microscopy reveal that a thermal activation of GNRs induces the rearrangement of the electron-rich carbazole into an electron-deficient phenanthridine. The selective chemical edge-reconstruction of carbazole-substituted chevron GNRs represents a practical strategy for the controlled fabrication of spatially defined GNR heterostructures from a single molecular precursor.