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Hydrodynamic diameters of TiO2 particles in freshly prepared and neutralized sols.
| Samples | Particle size (nm) in fresh sols | Particle size (nm) in neutralized sols | |
|---|---|---|---|
| Before US | After US | After US | |
| Amorphous (1.5) | 12000 | 202 | 200 |
| Brookite (2.1) | 20 | 2.2 | 50 |
| Rutile (2.2) | 1200 | 1200 | 1200 |
| Anatase (3.2) | 10 | 12 | 90 |
| Anatase (3.3) | 7 | 13 | 40 |
| Anatase (3.5) | 3 | 9 | 50 |
