Fig. 3From: Nanostructured porous graphene and its composites for energy storage applications(Reprinted with permission [17])Processes to form honeycomb structures composed of graphene sheets: a schematic drawing of the preparation of the honeycomb structured film based on graphene oxide; b photographs of the GO solution during phase transfer process by DODA; c the UVvis spectra of the GO in water (black), GO/DODA casting film (red), and the rGO/DODA film after exposure to N2H4 vapor (green)Back to article page