Direct visualization of atomically precise nitrogen-doped graphene nanoribbons

被引：88

作者：

Zhang, Yi ^{[1
,2
]}

Zhang, Yanfang ^{[1
,2
]}

Li, Geng ^{[1
,2
]}

Lu, Jianchen ^{[1
,2
]}

Lin, Xiao ^{[3
,4
]}

Du, Shixuan ^{[1
,2
]}

Berger, Reinhard ^{[5
]}

Feng, Xinliang ^{[5
]}

Muellen, Klaus ^{[5
]}

Gao, Hong-Jun ^{[1
,2
]}

机构：

[1] Chinese Acad Sci, Inst Phys, Beijing 100190, Peoples R China

[2] Chinese Acad Sci, Univ Chinese Acad Sci, Beijing 100190, Peoples R China

[3] Chinese Acad Sci, Univ Chinese Acad Sci, Beijing 100049, Peoples R China

[4] Chinese Acad Sci, Inst Phys, Beijing 100049, Peoples R China

[5] Max Planck Inst Polymer Res, D-55128 Mainz, Germany

来源：

APPLIED PHYSICS LETTERS | 2014年 / 105卷 / 02期

关键词：

BAND-GAP; SURFACE;

D O I：

10.1063/1.4884359

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We have fabricated atomically precise nitrogen-doped chevron-type graphene nanoribbons by using the on-surface synthesis technique combined with the nitrogen substitution of the precursors. Scanning tunneling microscopy and spectroscopy indicate that the well-defined nanoribbons tend to align with the neighbors side-by-side with a band gap of 1.02 eV, which is in good agreement with the density functional theory calculation result. The influence of the high precursor coverage on the quality of the nanoribbons is also studied. We find that graphene nanoribbons with sufficient aspect ratios can only be fabricated at sub-monolayer precursor coverage. This work provides a way to construct atomically precise nitrogen-doped graphene nanoribbons. (C) 2014 AIP Publishing LLC.

引用

页数：4

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