Table 1.
Cytotoxicity and antimicrobial activity (MIC and microorganism growth inhibition zone) of TiO2 modified with Pd and/or Au nanoparticles.
| sample label | cytotoxicity EC50 (µg/mL) | antimicrobial activity | |
| MIC (µg/mL) | zone of inhibition diameter (mm)a | ||
| pure TiO2 | >300 | >500 | 6 |
| 0.1Au | 187.50 ± 0.43 | >500 | 6 |
| 0.25Au | 118.39 ± 2.19 | >500 | 9 |
| 1.25Au | 156.80 ± 0.42 | >500 | 9 |
| 0.1Pd | 164.18 ± 1.75 | >500 | 6 |
| 0.25Pd | 186.35 ± 1.73 | >500 | 6 |
| 0.5Pd | 204.02 ± 1.96 | >500 | 6 |
| 0.5Pd_1.25Au | 275.63 ± 3.13 | >500 | 6 |
| 0.1Pd_0.1Au | 165.96 ± 0.76 | >500 | 6 |
| 0.1Pd_0.25Au | 158.00 ± 0.92 | >500 | 6 |
| 0.1Pd_0.5Au | 195.73 ± 1.82 | >500 | 7 |
| 0.1Pd_1.25Au | 155.35 ± 2.38 | >500 | 7 |
| 0.5Pd_0.1Au | 141.91 ±1.73 | >500 | 6 |
| 0.5Pd_0.25Au | 175.12 ± 1.91 | >500 | 6 |
| 0.5Pd_0.5Au | 162.68 ± 2.29 | >500 | 7 |
| 0.25Pd_0.25Au | 134.28 ± 1.35 | >500 | 6 |
| 0.25Pd_0.5Au | 241.73 ± 3.07 | >500 | 6 |
| 0.25Pd_1.25Au | 220.80 ± 0.51 | >500 | 6 |
aA value of 6 equals the diameter of the paper disc, i.e., no inhibition occurred.