Experimental observation of radial breathing-like mode of graphene nanoribbons

被引：15

作者：

Yu, Fang ^{[1
,2
,3
]}

Zhou, Haiqing ^{[1
,3
]}

Zhang, Zengxing ^{[4
]}

Tang, Dongsheng ^{[5
]}

Chen, Minjiang ^{[1
,3
]}

Yang, Huaichao ^{[1
,3
]}

Wang, Gang ^{[1
,3
]}

Yang, Haifang ^{[6
]}

Gu, Changzhi ^{[6
]}

Sun, Lianfeng ^{[1
]}

机构：

[1] Natl Ctr Nanosci & Technol, Beijing 100190, Peoples R China

[2] Peking Univ, Acad Adv Interdisciplinary Studies, Beijing 100871, Peoples R China

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

[4] Tongji Univ, Dept Phys, Shanghai 200092, Peoples R China

[5] Hunan Normal Univ, Coll Phys & Informat Sci, Changsha 410081, Hunan, Peoples R China

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

来源：

APPLIED PHYSICS LETTERS | 2012年 / 100卷 / 10期

基金：

美国国家科学基金会;

关键词：

WALLED CARBON NANOTUBES;

D O I：

10.1063/1.3692108

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We report that single-walled carbon nanotubes (SWNTs) can be etched into graphene nanoribbons (GNRs) by iron etching, which is confirmed by Raman spectroscopy and transmission electron microscopy. Compared with SWNTs, there are some unique features in Raman spectra of GNRs: symmetric G peak with no splitting, larger Raman intensity of 2D peak than G peak, and lower frequency and narrower full width at half maximum for 2D peak. Similar to radial breathing modes in SWNTs, theoretically predicted radial breathing-like mode of GNRs is also observed: a clear and prominent peak around 223 cm(-1) in the low frequency regions. This work paves the way for future studies of nanodevices based on SWNT-GNR heterojunction. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.3692108]

引用

页数：4