The impact of graphene composite surfaces in the architecture of cyanobacterial biofilms

Glass, epoxy resin and graphene nanoplatelet (GNP) composite were analyzed regarding wettability and roughness. Cyanobacterial biofilms from Lusitaniella coriacea LEGE 07157 were developed on these surfaces for seven weeks and under controlled hydrodynamic conditions. Biofilm wet weight, structural parameters (biofilm thickness, empty spaces, and average size of empty spaces) obtained from Optical Coherence Tomography (OCT), and biovolume and surface coverage obtained by Confocal Laser Scanning Microscopy (CLSM) were analyzed.