Table 2. Average size distributions of selected NP suspensions in ASW at different times after sonication, as determined by Dynamic Light Scattering (DLS).
| NP type | Concentration in ASW | Average size distribution (± Standard Deviation) with time (nm) | ||
| After 15 min | After 1 h | After 24 h | ||
| TiO2 | 200 µg/ml | 4195 (±1433) | 5514 (±4199) | 5846 (±4568) |
| 50 µg/ml | 2659 (±1957) | 3982 (±3361) | 4440 (±3765) | |
| ZnO | 200 µg/ml | 2852 (±1550) | 3765 (±2337) | 4056 (±2193) |
| 50 µg/ml | 2193 (±1525) | 3036 (±2332) | 3467 (±2547) | |
| CeO2 | 200 µg/ml | 2665 (±1425) | 4872 (±4039) | 5034 (±4479) |
| 50 µg/ml | 1906 (±1140) | 2919 (±2086) | 3438 (±3118) | |
| SiO2 | 1 mg/ml | 178 (±105) | 180 (±98) | 208 (±103) |