Fig. 3From: Interfactant action of an amphiphilic polymer upon directing graphene oxide layer formation on sapphire substratesLight microscopic image of a water drop on a a dried deposit of water-rinsed GO dispersion, b a pristine sapphire surface, c a G50/sapphire interfactant film (sample G50-17h), and d a GO/G50/sapphire filmBack to article page