Fig. 4 | Nature Communications

Fig. 4

From: Paraffin-enabled graphene transfer

Fig. 4

Materials characterization of the PMMA- and paraffin-transferred graphene on Si/SiO2 substrate. a, b Typical AFM height profile images of graphene film transferred with a PMMA and b paraffin support layers. c, d Correlation map of the Raman G and 2D peak positions of graphene transferred with c PMMA and d paraffin support layers. A total of 3600 Raman spectra were taken from each type of transferred graphene and the corresponding G peak position (\({\mathrm{\omega }}_{\mathrm{G}}\)), 2D peak position (\({\mathrm{\omega }}_{2{\mathrm{D}}}\)), and 2D peak’s full width at half maximum (Γ2D) were extracted. The black circle represents the G and 2D peak positions of an intrinsic graphene, where graphene has neither doping nor strain