Table 1 Zeta potential and hydrodynamic diameter measurements of polystyrene nanoparticles in DI water, PBS, and cell culture medium
| Â | Zeta potential (mV) | Hydrodynamic diameter (nm) | ||||
|---|---|---|---|---|---|---|
DI water | PBS | Cell culture medium | DI water | PBS | Cell culture medium | |
PS | −8.0 ± 2.0 | −16.7 ± 11.0 | −13.9 ± 0.6 | 50.1 ± 1.0 | 49.4 ± 3.6 | 88.9 ± 1.8 |
PS-COOH | −21.3 ± 2.2 | −17.1 ± 7.7 | −8.2 ± 2.6 | 60.3 ± 5.0 | 53.3 ± 14.5 | 53.5 ± 14.3 |
PS-NH2 | +20.4 ± 1.3 | +13.7 ± 3.3 | −13.9 ± 0.3 | 74.8 ± 16.2 | 54.0 ± 12.4a | 369.1 ± 29.3 |