Fig. 4 shows a typical Raman spectrum of GO. The positions
of its peaks are summarized in Table 1. The peaks are
denoted in accordance with literary notations (see e.g. [33]).
For graphite oxide peaks there are literary data on 1582–
1603 cm1
. One can therefore conclude that for a wide
halfwidth band, determining the peak position with a
1 cm1 accuracy can unlikely be accepted as a reliable
material characterization criterion. Earlier [25] the D and G
peak intensity ratio (ID/IG) was attributed to the size LG of
graphene crystallites in the basal plane: