Figure 3
Optical images and Raman spectra of h-BN and graphene/h-BN transferred onto a 300-nm-thick SiO2/Si substrate. 3(b) Raman spectrum of single-layer h-BN in (a). (d) Raman spectra of graphene/h-BN and SiO2/Si substrate in (c), where A represents the region of the SiO2/Si substrate and B is the region of graphene/h-BN.
