Table 1.
Characterization of AuNP1 and AuNP2.
| AuNP1 | AuNP2 | |
|---|---|---|
| Plasmon band maximum | 517 nm | 523 nm |
| Metallic core diameter | 7.2 ± 3.0 nm | 7.8 ± 2.9 nm |
| Hydrodynamic diameter | 36 ± 4 nm | 35 ± 7 nm |
| Zeta potential | −13 ± 3 mV | 0 ± 4 mV |
| % Au atoms | 32.1% | 30.5% |
| % S atoms | 1.33% | 1.83% |
| Number of internal thiol groups | 2689 | 2689 |
| Number of peripheral thiol groups | 0 | 1205 |
| Estimated molecular weight | 7 460 000 g.mol−1 | 6 255 000 g.mol−1 |
| Molar extinction coefficient | 2.78 × 107 L.mol−1.cm−1 | 1.57 × 107 L.mol−1.cm−1 |
Data for metallic core diameters, hydrodynamic diameters and zeta potentials are reported as mean ± standard deviation.