FIGURE 6.

| Proposed antiviral and antibacterial mechanism of the coating. (A) A calibration curve of Cu(I) ions was performed using a BCA assay. The known Cu(I) concentration data points are depicted in black, their linear trendline in red, and the data point corresponding to the Cu(I) concentration released from the new, old, and renewed PCN-coated surfaces are depicted in purple, orange, and green, respectively. (B) A calibration curve of H₂O₂ was performed using an ABTS assay. The known H₂O₂ concentration data points are depicted in black, their linear trendline in red, and the data point corresponding to the H₂O₂ concentration released from the new, old, and renewed PCN-coated surfaces are depicted in purple, orange, and green, respectively. (C) The suggested mechanism of the antibacterial and antiviral activity of the PCN-coated surface.