Influence of Annealing on Raman Spectrum of Graphene in Different Gaseous Environments

作者：Xie Wei Guang; Lai Xi; Wang Xiao Mu; Wan Xi; Yan Meng Long; Mai Wen Jie; Liu Peng Yi; Chen Jian^*; Xu Jian bin

来源：Spectroscopy Letters, 2014, 47(6): 465-470.

DOI：10.1080/00387010.2013.809595

• annealing
• graphene
• Raman spectroscopy

Graphene grown by a coronene (C-graphene) source is transferred to an SiO2 surface, and its Raman spectra are investigated in annealing environments of O-2, Ar, and N-2. An irreversible doping effect is observed in all the annealing environments, which is attributed to the enhancement of substrate doping. Compared with the mechanically exfoliated graphene on SiO2, stronger remnant stress remains in the transferred C-graphene, and wrinkles prevail on the surface. It is found that the defect density increases only after O-2 annealing, and the full width half maximum (FWHM) of the G and 2D bands in the Raman spectrum increases in all the annealing atmospheres. We suggest that the increase of FWHM is caused by the crystalline disorders.

• 单位
  暨南大学; 香港中文大学; 济南大学; 香港大学