Figure 4.

Representative plate photographs of the colony forming units (CFUs) for the antibacterial tests performed with methicillin-resistant Staphylococcus epidermidis (MRSE) in isotonic saline solution (negative control), and in isotonic saline solution with 80 µg/mL of graphene oxide (GO), carbon nanofibers (CNFs) or zinc (positive control) after 1.5 and 3 h of culture at 37 °C in the dark and under continuous LED irradiation (Dilution factor of 10⁻⁴).