Table 3.
Luminescent films fabricated by LbL for ions detection.
| Analyte | Sensitive Indicator | Sensing Film | Detection Range | LOD | Cross-Sensitivity | Ref. |
|---|---|---|---|---|---|---|
| Fe3+, Hg2+ | HPTS | [PAH/PAA-HPTS]n | 0–0.5 mM Fe3+
0–1 mM Hg2+ |
1.28 ppm Fe3+
1.79 ppm Hg2+ |
- | [100,101] |
| Hg2+ | TPPS | (PDDA/PSS/PDDA/TPPS) | 0–3.3 × 10−5 M | <3.3 × 10−8 M | Cd2+, Pb2+, Cu2+ | [102] |
| Hg2+ | PPESO3 | (PDDA/PPESO3)3 | 0–1 mM | 10−7 M | Fe3+, Al3+ | [104] |
| Fe3+ | PFPNa | (PDAC/PFPNa)1 | 0–10 μM | 10−7 M | - | [103] |
| Hg2+ | MSA-capped CdTe QDs | (PDDA/QDs)10 | 0–1 μM | <10−8 M | Cu2+, Ag1+ | [105] |
| Cu2+, Hg2+ | MSA-capped CdTe QDs | (PDDA/QDs)5 | 0–1 μM Cu2+
0–0.5 μM Hg2+ |
<10−8 M Cu2+
<5 × 10−9 M Hg2+ |
High concentrations of Ni2+, Cr3+, Au3+, Ag+ | [106] |
| Hg2+ | MPA-capped CdTe QDs | (PDDA/QDs)5/PDDA/PSS/PDDA/(QDs)5/BSA | 0.01–1 μM | 4.5 × 10−9 M | - | [107] |
| Hg2+ | Carbon dots | (PEI/Carbon dots)1-6 | 0.01–2.69 μM for (PEI/Carbon dots)6 | 10−8 M for (PEI/Carbon dots)6 | - | [108] |
| Cu2+ | (16-MHA) capped CdSe QDs | Ag NPs/(PDADMAC/PSS)/QDs | 0–100 μM | 5 × 10−9 M | - | [109] |