Table 1.
Physicochemical properties for the five AgNP formulations studied in this work.
| Properties | AgNP1 | AgNP2 | AgNP3 | AgNP4 | AgNP5 |
|---|---|---|---|---|---|
| Average diameter of metallic cores ØAg (nm) | 16.4 ± 8.0 | 25.4 ± 13.2 | 19.0 ± 9.3 | 16.4 ± 8.1 | 30.6 ± 23.2 |
| TEM size distribution (nm) | 5–40 | 5–60 | 5–40 | 5–40 | 5–80 |
| PVP | K-15 a | K-17 b | K-17 b | K-30 c | 12.6 KDa |
| Hydrodynamic diameter Øhydro (nm) | 448.7 | 90.4 | 43.8 | 483.2 | 121.1 |
| Polydispersity index (PDI) | 0.813 | 0.270 | 0.433 | 0.555 | 0.280 |
| Zeta potential ζ (mV) | −0.872 | −4.56 | −5.13 | −0.464 | −1.46 |
| Surface plasmon resonance (λ) | 415 | 402, 444 | 402 | 406, 549 | 429 |
| TGA analysis | |||||
| Metallic silver (% w/w) | 1.14 ± 0.02 | 1.32 ± 0.05 | 1.26 ± 0.03 | 1.19 ± 0.01 | 1.31± 0.01 |
| PVP (% w/w) | 19.62 ± 0.30 | 24.49 ± 0.70 | 24.43 ± 0.20 | 20.92 ± 0.42 | 21.67 ± 0.50 |
| H2O (% w/w) | 79.24 ± 0.45 | 74.25 ± 0.60 | 75.74 ± 0.25 | 77.89 ± 0.80 | 77.02 ± 0.40 |
| Morphology | Spherical | Spherical | Mostly Spherical | Mostly Spherical | Spherical |
a K-15: 8000–12,000 kDa; b K-17: 10,000–16,000 kDa; c K-30: 45,000–58,000 kDa.