Size-dependent reactivity of highly photoluminescent CdZnTeS alloyed quantum dots to mercury and lead ions

Hoang, Quang-Bac; Nguyen, Thuy Van; Nguyen, Thi-Phuong; Nguyen, Anh-Duc; Chu, Nhat-Huy; Ta, Van-Thao; Nguyen, Van-Hao; Dũng, Mai Xuân

doi:10.1016/j.chemphys.2021.111378

Cited by 4 publications

(1 citation statement)

References 41 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…To put it briefly, the increased PL in the presence of Pb 2+ and Hg 2+ ions was caused by cation exchange and Z-type ligand interactions, which were part of the detecting process. 225 Novel multifunctional carbon-CdTe quantum dots were developed by Jialing Zhou et al for the simultaneous detection of hydrogen iron( ii ) (Fe 2 + ) and peroxide (H 2 O 2 ) in serum. The probe detected H 2 O 2 with a linear relationship and a detection limit of 58 nM using dual-emission fluorescence.…”

Section: Photophysical Properties Of Cqdsmentioning

confidence: 99%

Advancements in semiconductor quantum dots: expanding frontiers in optoelectronics, analytical sensing, biomedicine, and catalysis

Mondal,

Lamba,

Yukta

et al. 2024

J. Mater. Chem. C

View full text Add to dashboard Cite

show abstract

Section: Photophysical Properties Of Cqdsmentioning

confidence: 99%

Advancements in semiconductor quantum dots: expanding frontiers in optoelectronics, analytical sensing, biomedicine, and catalysis

Mondal,

Lamba,

Yukta

et al. 2024

J. Mater. Chem. C

View full text Add to dashboard Cite

show abstract

Exploring the probing capacities of MSA capped CdTe semiconductor quantum dots as optical chemsensors via analytical and isotherms modeling for selective Hg2+ detection

Ajroud,

Abdella,

Alanazi

et al. 2024

Appl Water Sci

View full text Add to dashboard Cite

Heavy metal ions bioaccumulation can cause severe damage to environment and human health. Hence, the development of an effective detection assay of trace amounts of these ions is of great importance. Here, CdTe quantum dots (QDs) capped with mercaptosuccinic acid (MSA) ligands have been synthesized in aqueous solution with significant stability and good fluorescence properties. Photophysical characterization was performed using FTIR, XRD, HRTEM and UV–Vis. Absorption, PL and PLRT techniques, seeking their subsequent application as fluorescent probes for metal cations. CdTe-MSA QDs showed selective sensitivity toward Hg2+ ions by monitoring quantitative fluorescence quenching with increasing analyte content. Under optimal conditions, the linear range for the detection was 0.2–6 μM with a detection limit of 0.05 μM. According to the Stern–Volmer model, it can be inferred that a static quenching mechanism via Hg2+ selective binding to MSA carboxylate groups is operating with electron transfer process. Excess of mercuric ions further decreased and red shifted the fluorescence possibly due to competitive cation exchanges. To further explain the corresponding ligation mechanisms, adsorption behavior study was conducted via several isotherms as well as statistical physics models. The pseudo-first-order model can describe the adsorption kinetics of Hg2+ on CdTe-MSA QDs more accurately and the experimental data fitted well the Langmuir isotherm model of monolayer adsorption on homogeneous surface. Furthermore, this spontaneous process conforms to the Hill model as a physisorption with an adsorption energy of 32 kJ.mol−1 associated with the electrostatic interactions and hydrogen bonding. The developed system was assayed in the Hg2+ trace amount detection in real tap water and showed satisfactory accuracy performance meeting analytical requirements. The relevant results demonstrated that CdTe-MSA QDs could be deployed as promising Hg2+ fluorescent chemosensing system with high sensitivity and selectivity over wide linear detection range that have great potential for real water samples analysis.

show abstract

Application of quantum dots in sensors

Kunwar

Zala²,

Parveen³

2023

Quantum Dots

View full text Add to dashboard Cite

Size-dependent reactivity of highly photoluminescent CdZnTeS alloyed quantum dots to mercury and lead ions

Cited by 4 publications

References 41 publications

Advancements in semiconductor quantum dots: expanding frontiers in optoelectronics, analytical sensing, biomedicine, and catalysis

Advancements in semiconductor quantum dots: expanding frontiers in optoelectronics, analytical sensing, biomedicine, and catalysis

Exploring the probing capacities of MSA capped CdTe semiconductor quantum dots as optical chemsensors via analytical and isotherms modeling for selective Hg2+ detection

Application of quantum dots in sensors

Contact Info

Product

Resources

About