Exploring the mechanism of CdTe quantum dots as fluorescent probe to detect Hg(II) ion from the perspectives of fluorescence polarization and light scattering

Recent advances in II–VI group semiconductor- and carbon-based quantum dots for fluorescence-based sensing of metal ions in water

“…). Thioglycolic acid (TGA), 51 glutathione (GSH), l -cysteine (Cys), 52 and mercaptopropionic acid (MPA) 15,53 are the commonly used coatings among the thiols for the direct preparation of thiol-capped QDs. 54 Wang et al 55 showed a simple approach for sensing As 3+ using GSH-capped CdTe QDs.…”

“…The use of thiol group surface ligands such as MPA, 53,117–120 2-MPA, 14 TGA, 16,121 QDs, l -Cys (cys), 64,122,123 mercaptoisobutyric acid (3-MIBA), 124 and MSA 125–130 with different combinations of QDs to create metal–S particle complexes and quench the fluorescence of QDs, has been widely studied. Besides the interaction between the sulfide bond and metal ion, Liu et al demonstrated a different approach for sensing Hg 2+ .…”

Nanomaterials Used in Fluorescence Polarization Based Biosensors

“…Their results indicated that the reaction between Hg 2+ and CdTe QDs caused QDs to become unstable which resulted in aggregation of QDs, slowing its rotation in solution, and therefore increasing the FP value. This finding provided a new perspective on the FP technique to explore the mechanism of certain reactions [ 49 ].…”

Sensitive detection of cadmium ions based on a quantum-dot-mediated fluorescent visualization sensor

“…And CdTe QDs have been considered promising candidates for the determination of analytes. [21][22][23][24] However, not only organic uorophore-based uorescence sensors but also QD-based uorescence systems are mostly single emitting uorescence probes which show weak anti-interference capability and low repeatability in real samples. In comparison with a single-wavelength uorescence probe, a dual-emission uorescence probe is not likely to suffer interference from the background or uctuation due to environmental conditions, contributing to an increase in their reliability and sensitivity.…”