Table 1.
Initial target material characteristics and property values.
| Material properties | Target values/characteristics | ||
|---|---|---|---|
| SiO2 | TiO2 | Quantum dots | |
| Size (nominal particle diameter) | 50 nm | 20 nm | 30 nm |
| Polydispersity (FWHM/mean diameter) | <0.25 | <0.25 | <0.25 |
| Surface functionalization | Aminated | None | Aminated or carboxylated |
| Zeta potential (absolute value) | >10 mV | >10 mV | >30 mV |
| Mass fraction | >5 g/kg | >5 g/kg | About 20 g/kg |
| Amount (mass of particles) | 12 g | 7 g | 7 g |
| Shelf-life (in closed containers) | 18 months | 18 months | 18 months |
| Shelf-life (after opening containers) | 5 days | 5 days | 5 days |