Edge State Engineering of Graphene Nanoribbons
Edge State Engineering of Graphene Nanoribbons
复制标题
石墨烯纳米带的边缘态工程
DOI：
10.1021/acs.nanolett.8b02356
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发表时间：
2018
期刊：
影响因子：
10.8
通讯作者：
Ping Yu
中科院分区：
文献类型：
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作者：
Xuelei Su;Zhijie Xue;Gang Li;Ping Yu
石墨烯纳米带的锯齿形边缘被预测为自旋极化电子态的宿主，为未来的自旋电子器件应用带来了巨大的希望。精确设计锯齿边缘状态的能力对于实现其在纳米技术中的全部潜在功能至关重要。通过结合扫描隧道显微镜和原子力显微镜，我们证明了锯齿形边缘态的能量分裂融合锰酞菁分子与短扶手椅型石墨烯纳米粒子终端。此外，边态分裂可以通过氢原子在酞菁锰磁性核上的吸附和脱附来可逆地切换。这些观察结果可以解释通过调整锯齿形边缘的局部掺杂通过电荷转移过程，这提供了一种新的途径功能化石墨烯基分子器件。
Zigzag edges of graphene nanoribbons, which are predicted to host spin-polarized electronic states, hold great promise for future spintronic device applications. The ability to precisely engineer the zigzag edge state is of crucial importance for realizing its full potential functionalities in nanotechnology. By combining scanning tunneling microscopy and atomic force microscopy, we demonstrate the zigzag edge states have energy splitting upon fusing manganese the phthalocyanine molecule with the short armchair graphene nanoribbon termini. Moreover, the edge state splitting can be reversibly switched by adsorption and desorption of a hydrogen atom on the magnetic core of manganese phthalocyanine. These observations can be explained by tuning the zigzag edge local doping through the charge transfer process, which provides a new route to functionalize graphene-based molecular devices.