Table 2.
Recent optical sensors for ferric ions’ detection.
| Synthesis Agent | Type of NPs | Fluorescence Mechanism | Dynamic Range (µM) | LOD (µM) |
Refs. |
|---|---|---|---|---|---|
| Peptide-6 (GHRP-6) | Au-NCs | Turn-off | 2–1000 | 1.4 | [59] |
| Prunus avium fruit extract | Carbon Dot | Turn-off | 0–100 | 0.96 | [60] |
| Vancomycin | Au-NCs | Turn-off | 2–100 | 1.4 | [61] |
| Fish-scale | Carbon dot | Turn-off | 1–78 | 0.54 | [62] |
| l-proline | Au-NCs | Turn-off | 5–2000 | 2.0 | [63] |
| Boron | Carbon Dot | Turn-off | 0−16 | 242 | [64] |
| l-3,4-dihydroxyphenylalanine | Au-NCs | Turn-off | 5–1280 | 3.5 | [65] |
| Glutathione | Ag-NCs | Turn-off | 0.5–2 | 0.12 | [66] |
| Tryptophan | Ag-NCs | Turn-off | 0–6 | 0.0169 | This work |