Table 4.
The natural raw materials for synthesizing CDs
| Precursor | Excitation wavelength (nm) | Emission wavelength (nm) | References |
|---|---|---|---|
| Bagasse | 372 | 627 | 162 |
| Carica papaya juice | Excitation-dependent | Multicolor | 163 |
| Lemon juice | Excitation-dependent | Multicolor | 164 |
| Orange peels | 460 | 590 | 162 |
| Curcumin | Excitation-dependent | Multicolor | 166 |
| Orange waste peel | Excitation-dependent | Multicolor | 167 |
| Black tea | 490 | 590 | 168 |
| Bee Pollens | Excitation-dependent | Multicolor | 169 |
| Cabbage | Excitation-dependent | Multicolor | 170 |
| Onion waste | Excitation-dependent | Multicolor | 171 |
| Osmium sanctum | Excitation-dependent | Multicolor | 172 |
| Manilkara zapota | Excitation-dependent | Multicolor | 173 |