TABLE 1.
Physicochemical Characteristics of Ag NPs
| Property | Technique | C20 | C110 | P20 | P110 |
|---|---|---|---|---|---|
| Core diameter (nm) | TEM | 20 | 110 | 20 | 110 |
| Hydrodynamic diameter, Z-Avg (nm) | DLS | 24.0 | 104.2 | 26.0 | 112.3 |
| [Silver] (mg/g) | ICP-MS | 1.1 | 1.0 | 1.1 | 1.1 |
| [free Ag] (µg/g NP), % of total Ag | ICP-MS | 3.086 ± 0.118, 0.31 | 0.070 ± 0.003, 0.007 | 7.326 ± 0.278, 0.73 | 1.793 ± 0.18, 0.18 |
| [PVP] (µg/mg total Ag) | ICP-MS | · | · | 33.3 ± 0.3 | 62.4 ± 1.7 |
| Absorption (λmax nm) | UV–Vis | 402 | 412 | 402 | 507 |
| Zeta potential in H20 (mV) | Zetasizer | −43.1 ± 1.7 to −55.5 ± 1.0 | −38.0 ± 2.7 to −46.5 ± 1.2 | −32.5 ± 1.9 to −40.6 ± 1.6 | −23.3 ± 1.5 to −26.5 ± 0.8 |
| [Endotoxin] (EU/ml) | LAL | <0.5 | <0.5 | <2.1 | <0.5 |