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As displayed in Figure 3a, the characteristic D and G bands of
carbon materials are observed at around 1350 and 1585 cm-1,
respectively. The D band is associated with disordered
samples or graphene edges, while the G band is the result of
the first-order scattering of the E2 g mode of sp2 carbon domains.

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As displayed in Figure 3a, the characteristic D and G bands of carbon materials are observed at around 1350 and 1585 cm-1, respectively. The D band is associated with disordered samples or graphene edges, while the G band is the result of the first-order scattering of the E2 g mode of sp2 carbon domains.

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