Table 3.
Hydrodynamic diameter and zeta potential (ZP) of nanoparticle (NP) working dispersions (concentration 212 µg/mL, corresponding to 75 µg/cm2). For analysis, samples were diluted 1:10 in pure water. Numbers are given as mean ± standard deviation (SD) (n = 3). PDI: polydispersity index; a.u.: arbitrary unit.
| NP | Time (h) | Hydrodynamic Diameter (nm), by Intensity | PDI (a.u.) | ZP (mV) |
|---|---|---|---|---|
| TiO2-NPs | 0 | 217.3 ± 27.3 | 0.285 ± 0.013 | −5.73 ± 1.62 |
| 24 | 189.8 ± 16.2 | 0.235 ± 0.022 | −7.49 ± 2.63 | |
| Ag-NPs (NM300K) | 0 | 37.3 ± 0.04 | 0.283 ± 0.065 | −14.4 ± 1.99 |
| 24 | 508.8 ± 29.5 | 0.452 ± 0.095 | −20.1 ± 1.45 | |
| ZnO-NPs (NM110) | 0 | 346.1 ± 9.6 | 0.258 ± 0.020 | −23.8 ± 0.30 |
| 24 | 338.0± 21.7 | 0.281 ± 0.032 | −24.9 ± 0.25 |