Edge phonon state of mono- and few-layer graphene nanoribbons observed by surface and interference co-enhanced Raman spectroscopy

被引：79

作者：

Ren, Wencai ^{[1
]}

Saito, Riichiro ^{[2
]}

Gao, Libo ^{[1
]}

Zheng, Fawei ^{[2
]}

Wu, Zhongshuai ^{[1
]}

Liu, Bilu ^{[1
]}

Furukawa, Masaru ^{[2
]}

Zhao, Jinping ^{[1
]}

Chen, Zongping ^{[1
]}

Cheng, Hui-Ming ^{[1
]}

机构：

[1] Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China

[2] Tohoku Univ, Dept Phys, Sendai, Miyagi 9808578, Japan

来源：

PHYSICAL REVIEW B | 2010年 / 81卷 / 03期

关键词：

WALL CARBON NANOTUBES; SCATTERING; GRAPHITE; FILMS; RIBBONS; PSEUDOPOTENTIALS; POLYACETYLENE; DISORDER; SYSTEMS;

D O I：

10.1103/PhysRevB.81.035412

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Using surface and interference co-enhanced Raman scattering measurements, we detected two well-distinguished Raman bands at 1450 and 1530 cm(-1) from individual mono-and few-layer graphene nanoribbons (GNRs) prepared by chemical exfoliation and mechanical cleavage of graphite. The intensities of these two peaks strongly depend on the width and edge structure of the GNRs. Combining with first-principles calculations, the 1450 and 1530 cm(-1) Raman bands are assigned to the localized vibration of the edge atoms of zigzag and armchair GNRs terminated with H atoms, respectively. In addition, two weak peaks at similar to 1140 and 1210 cm(-1) are also observed, which are coupled with 1450 and 1530 cm(-1), respectively. These findings enrich the understanding on the fine structure of mono-and few-layer GNRs by Raman spectroscopy.

引用

页数：7

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