Table 3.
Physico-chemical characteristics of bare and modified SPIONs.
| Parameter | Bare SPIONs | SPIONs-CPTES | SPIONs-CPTES- HAPtS | |
|---|---|---|---|---|
| Isoelectric point | 8.3 | 5.9 | 8.2 | |
| Hydrodynamic size in water | dH (number) (nm) | 21 ± 8 | 26 ± 7 | 92 ± 20 |
| PDI | 0.157 ± 0.004 | 0.189 ± 0.003 | 0.329 ± 0.026 | |
| Z-average (nm) | 67 ± 1 | 96 ± 5 | 145 ± 10 | |
| Hydrodynamic size in PBS 0.1× | dH (number) (nm) | 60 ± 9 | 50 ± 8 | 118 ± 25 |
| PDI | 0.489 ± 0.016 | 0.230 ± 0.004 | 0.410 ± 0.012 | |
| Z-average (nm) | 299 ± 16 | 135 ± 12 | 220 ± 8 | |
| TEM measured diameter (nm) | 9.0 ± 2.0 | 8.7 ± 1.5 | 9.6 ± 1.6 | |