Fig. 6From: Interfactant action of an amphiphilic polymer upon directing graphene oxide layer formation on sapphire substrates6–10 µm wide SFM images of a GO/G50/sapphire film showing a a height image in a region with strongly wrinkled GO adsorbates, b the phase image of the same region as shown in a, and c a height image in a region with single GO sheets in different sizesBack to article page