Irradiation effects of graphene and thin layer graphite induced by swift heavy ions

Zeng Jian^a), Liu Jie†^a), Zhang Sheng-Xia^a),^b), Zhai Peng-Fei^a), Yao Hui-Jun^a), Duan Jing-Lai^a), Guo Hang^a),^b), Hou Ming-Dong^a), Sun You-Mei^a)

Raman spectra of pristine thin graphite films exfoliated onto an SiO₂/Si substrate: (a) different Raman spectra of the graphite films with different thickness values, (b) the Lorentz peak fitting of the 2 D peak corresponding to single- and few-layer graphene flakes in panel (a). The numbers on the left side of the spectra in panel (a) are corresponding to number marks of the graphene flakes in Fig. 1 .