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Zeta potential of silica nanoparticles dispersed in water
| Particle diameter (nm) | Surface type | Zeta potential (mV) |
|---|---|---|
| 5 | PEG | −24.1 |
| 25 | PEG | −39.3 |
| 75 | PEG | −50.0 |
| 5 | Sulfonate | −31.3 |
| 25 | Sulfonate | −44.2 |
| 75 | Sulfonate | −52.8 |
| 5 | Quat | 9.3 |
| 25 | Quat | −1.1 |
| 75 | Quat | 15.2 |
| 5 | Unmodified | −48.7 |
| 25 | Unmodified | −60.3 |
| 75 | Unmodified | −79.8 |
