Synthesis of Regioisomeric Graphene Nanoribbon Junctions via Heteroprecursors
Synthesis of Regioisomeric Graphene Nanoribbon Junctions via Heteroprecursors
复制标题
DOI：
10.1021/acs.jpcc.9b05881
复制
发表时间：
2019-06
期刊：
影响因子：
--
通讯作者：
K. Sun;O. Krejčí;A. Foster;Y. Okuda;A. Orita;S. Kawai
中科院分区：
文献类型：
--
作者：
K. Sun;O. Krejčí;A. Foster;Y. Okuda;A. Orita;S. Kawai
石墨烯纳米带是最有前途的纳米电子材料之一。虽然通过表面反应成功合成了各种结构，但弯曲连接的研究仍然较少，但事实证明它们在共聚技术的开发中非常有用。在这里，我们展示了使用 10,10'-二溴-9,9'-联蒽和 1,3,6,8-四溴芘在 Au (111) 上合成三种不同的区域异构连接。通过结合具有 CO 端接尖端的扫描隧道显微镜、扫描隧道光谱和密度泛函理论计算，研究了结的化学结构和电子特性。我们发现两个相同的纳米带-结界面电子态出现在连接的石墨烯纳米带的带隙内。
Graphene nanoribbons are one of the most promising materials for nanoscale electronics. While various structures have successfully been synthesized by on-surface reactions, curved connections remain less investigated, yet they could prove highly useful in the development of copolymerization technology. Here, we present the synthesis of three different regioisomeric junctions on Au (111) by using 10,10′-dibromo-9,9′-bianthryl and 1,3,6,8-tetrabromopyrene. The chemical structures and the electronic properties of junctions were studied with a combination of scanning tunneling microscopy with a CO terminated tip, scanning tunneling spectroscopy, and density functional theory calculations. We found that two identical nanoribbon-junction interface electronic states appear within the band gaps of connected graphene nanoribbons.