Table 3: Amount of bacteria/mold growth (%) on the coatings containing nano ZnO in various concentrations.

Escherichia coli Staphylococcus aureus Pseudomonas aeruginosa Penicillium chrysogenum Aspergillus niger Control 80 90 95 100 100 1% ZnO 0 0 80 100 90 2% ZnO 0 0 80 100 80 3% ZnO 0 0 40 95 15 4% ZnO 0 0 25 95 5