Raman Study on the G Mode of Graphene for Determination of Edge Orientation

被引：83

作者：

Cong, Chunxiao ^{[1
]}

Yu, Ting ^{[1
]}

Wang, Haomin ^{[1
]}

机构：

[1] Nanyang Technol Univ, Div Phys & Appl Phys, Sch Phys & Math Sci, Singapore 637371, Singapore

来源：

ACS NANO | 2010年 / 4卷 / 06期

关键词：

graphene; edge orientation; Raman; polarization; SPECTROSCOPY; SCATTERING; STRAIN;

D O I：

10.1021/nn100705n

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

We report a confocal Raman study on edges of single-layer graphene. It is found that edge orientations could be identified by G mode in addition to D mode. We observe that G mode at the edges of single-layer graphene exhibits polar behaviors and different edges such as zigzag- or armchair-dominated responses differently than the polarization of the incident laser. Moreover, G mode shows stiffening at zigzag-dominated edges, while it is softened at armchair-dominated ones. Our observations are in good agreement with recent theory (Sasaki, K. et al. J. Phys. Soc. Jpn. 2010, 79, 044603) and could be well-explained by the unique properties of pseudospin at graphene edges, which lead to asymmetry of Raman active modes and non-adiabatic processes (Kohn Anomaly) at different types of edges. This work could be useful for further study on the properties of the graphene edge and development of graphene-based devices.

引用

页码：3175 / 3180

页数：6

共 29 条

[1] Charge and spin transport at the quantum Hall edge of graphene [J].

Abanin, Dmitry A. ;

Lee, Patrick A. ;

Levitov, Leonid S. .

SOLID STATE COMMUNICATIONS, 2007, 143 (1-2) :77-85

[2] Influence of the atomic structure on the Raman spectra of graphite edges -: art. no. 247401 [J].

Cançado, LG ;

Pimenta, MA ;

Neves, BRA ;

Dantas, MSS ;

Jorio, A .

PHYSICAL REVIEW LETTERS, 2004, 93 (24)

[3] Stokes and anti-Stokes double resonance Raman scattering in two-dimensional graphite -: art. no. 035415 [J].

Cançado, LG ;

Pimenta, MA ;

Saito, R ;

Jorio, A ;

Ladeira, LO ;

Grueneis, A ;

Souza, AG ;

Dresselhaus, G ;

Dresselhaus, MS .

PHYSICAL REVIEW B, 2002, 66 (03) :354151-354155

[4] Raman Spectroscopy of Graphene Edges [J].

Casiraghi, C. ;

Hartschuh, A. ;

Qian, H. ;

Piscanec, S. ;

Georgi, C. ;

Fasoli, A. ;

Novoselov, K. S. ;

Basko, D. M. ;

Ferrari, A. C. .

NANO LETTERS, 2009, 9 (04) :1433-1441

[5] Edge-functionalized and substitutionally doped graphene nanoribbons:: Electronic and spin properties [J].

Cervantes-Sodi, F. ;

Csanyi, G. ;

Piscanec, S. ;

Ferrari, A. C. .

PHYSICAL REVIEW B, 2008, 77 (16)

[6] Monitoring dopants by Raman scattering in an electrochemically top-gated graphene transistor [J].

Das, A. ;

Pisana, S. ;

Chakraborty, B. ;

Piscanec, S. ;

Saha, S. K. ;

Waghmare, U. V. ;

Novoselov, K. S. ;

Krishnamurthy, H. R. ;

Geim, A. K. ;

Ferrari, A. C. ;

Sood, A. K. .

NATURE NANOTECHNOLOGY, 2008, 3 (04) :210-215

[7] Raman spectrum of graphene and graphene layers [J].

Ferrari, A. C. ;

Meyer, J. C. ;

Scardaci, V. ;

Casiraghi, C. ;

Lazzeri, M. ;

Mauri, F. ;

Piscanec, S. ;

Jiang, D. ;

Novoselov, K. S. ;

Roth, S. ;

Geim, A. K. .

PHYSICAL REVIEW LETTERS, 2006, 97 (18)

[8] Interpretation of Raman spectra of disordered and amorphous carbon [J].

Ferrari, AC ;

Robertson, J .

PHYSICAL REVIEW B, 2000, 61 (20) :14095-14107

[9] The rise of graphene [J].

Geim, A. K. ;

Novoselov, K. S. .

NATURE MATERIALS, 2007, 6 (03) :183-191

[10] Probing Graphene Edges via Raman Scattering [J].

Gupta, Awnish K. ;

Russin, Timothy J. ;

Gutierrez, Humberto R. ;

Eklund, Peter C. .

ACS NANO, 2009, 3 (01) :45-52

← 1 2 3 →