Table 2.
Zeta potential measurements by the DLS and NTA. All values are averaged from 3 different replicates.
| System | DLS | NTA | ||||
|---|---|---|---|---|---|---|
| Zeta Potential (mV) | Concentration (mg Fe/mL) | Zeta Potential (mV) | Concentration (μg Fe/mL) | |||
| Water | PBS 0.1x | Water | PBS 0.1x | |||
| PVAL-COOH SPIONs | −13 ± 4 | −13.1 ± 0.2 | 0.50 | −40 ± 1 | −26 ± 2 | 0.067 |
| PVAL-OH SPIONs | +10 ± 3 | −4.0 ± 0.3 | 0.50 | +12 ± 5 | −16 ± 1 | 0.067 |
| PVAL-NH2 (+) SPIONs | +26 ± 6 | +0.5 ± 0.3 | 0.50 | +20 ± 1 | −13 ± 1 | 0.045 |
| PVAL-NH2 (++) SPIONs | +36 ± 2 | +12 ± 1 | 0.50 | +47 ± 1 | −34 ± 1 | 0.011 |
Main peak size described in the DLS report.