Resonant Raman spectroscopy of graphene grown on copper substrates

被引：85

作者：

Costa, Sara D. ^{[1
]}

Righi, Ariete ^{[1
]}

Fantini, Cristiano ^{[1
]}

Hao, Yufeng ^{[2
,3
]}

Magnuson, Carl ^{[2
,3
]}

Colombo, Luigi ^{[4
]}

Ruoff, Rodney S. ^{[2
,3
]}

Pimenta, Marcos A. ^{[1
]}

机构：

[1] Univ Fed Minas Gerais, Dept Phys, BR-30123970 Belo Horizonte, MG, Brazil

[2] Univ Texas Austin, Dept Mech Engn, Austin, TX 78712 USA

[3] Univ Texas Austin, Texas Mat Inst, Austin, TX 78712 USA

[4] Texas Instruments Inc, Dallas, TX 75243 USA

来源：

SOLID STATE COMMUNICATIONS | 2012年 / 152卷 / 15期

关键词：

Graphene; Copper; Raman;

D O I：

10.1016/j.ssc.2012.05.001

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

A study of resonant Raman spectroscopy of the as-grown graphene on copper foils is presented. Different laser energies have been used to excite the sample, in order to obtain the dependence of the Raman features (intensities, frequencies and line widths) on the laser energy. We show that the normalised spectra acquired using green laser lines are more intense, with a maximum around 2.3 eV. Moreover, the results show a broader 2D (or G') band when a UV laser is used to excite the sample, which is explained by the manifestation of the trigonal warping effect in the dispersion of electrons and phonons around the Dirac point. (C) 2012 Elsevier Ltd. All rights reserved.

引用

页码：1317 / 1320

页数：4

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