Figure 5
From: Sustained release of usnic acid from graphene coatings ensures long term antibiofilm protection

Representative scanning electron microscopic images of (a) S. aureus and (b) S. epidermidis biofilms grown on the non-coated (Control), graphene-coated (Gr) and surfaces coated with various concentrations of graphene loaded with UA. The biofilms were fixed, dehydrated and coated with gold before SEM imaging.