Quantum dot-based “turn-on” fluorescent probe for detection of zinc and cadmium ions in aqueous media

Hu, Xu; Miao, Ran; Fang, Zheng; Zhong, Xinhua

doi:10.1016/j.aca.2010.12.002

Cited by 144 publications

(61 citation statements)

References 54 publications

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“…3,4 Moreover, even at very low concentrations, Cd 2+ can induce a wide variety of health issues including the major killer diseases such as heart disease, cancer, and diabetes. [5][6][7][8][9][10] Inevitably, it is highly important to explore efficient methods for monitoring cadmium both in environment and in vivo.…”

Section: Introductionmentioning

confidence: 99%

Dithizone-etched CdTe nanoparticles-based fluorescence sensor for the off–on detection of cadmium ion in aqueous media

Liao

Ding

et al. 2017

RSC Adv.

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In the present study, a new fluorescence probe based on dithizone-etched CdTe nanoparticles was designed for the sensitive and selective detection of cadmium ions in environmental samples via a reversible off-on fluorescence mode. At first, the initial bright fluorescence of L-cysteine-capped CdTe NPs could be effectively quenched in the presence of dithizone (DZ) due to the chemical etching effect, which results from the breaking of Cd-thiol layers by DZ, thus leading to a decrease in the NPs surface passivation. Then, upon the addition of Cd 2+ , the weak fluorescence of the CdTe NPs-DZ system gradually recovered, owing to the occurrence of Cd-thiol passivation layers on the surface of the NPs.Under optimal conditions, a good linear relationship was obtained in the range from 0.4 mM to 15.4 mM for Cd 2+ , with a detection limit of 0.13 mM. In addition, this CdTe NPs-based nanosensor presents remarkable selectivity for Cd 2+ over other metal ions and was successfully applied for the detection of Cd 2+ in real water samples with satisfactory results, demonstrating its potential application for the determination of Cd 2+ in the environment.

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Section: Introductionmentioning

confidence: 99%

Dithizone-etched CdTe nanoparticles-based fluorescence sensor for the off–on detection of cadmium ion in aqueous media

Liao

Ding

et al. 2017

RSC Adv.

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“…3c shows calibration plot wherein linearity is observed between fluorescence quenching efficiency and Cu 2+ concentration in the range of 0.20-2.40 lM. The detection limit of 0.39 lM was calculated according to the IUPAC 3r criterion [28], which compares favorably with recently reported Cu 2+ detection data [29][30][31]. Being highly selective and sensitive, HPyETSC could function as a fluorescent sensor for Cu 2+ .…”

Section: Copper Ion Sensing Studiesmentioning

confidence: 99%

A new thio-Schiff base fluorophore with copper ion sensing, DNA binding and nuclease activity

Vikneswaran

Syafiq

Eltayeb

et al. 2015

Spectrochimica Acta Part A: Molecular and Biomolecular Spectros

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“…Compared with traditional organic dyes, QDs have broad excitation wavelength range, narrow and symmetrical emission spectrum, size-tunable emission peak, longer fluorescence lifetime, high photobleaching threshold and excellent photostability [18][19][20]. Since the first application of QDs in biological system demonstrated by Nie's and Alivisatos's groups independently in 1998, the use of QDs as optical probes in analytical field has been extensively exploited [21]. It relies on changes of the fluorescence intensity when the target analyte interacts with the surface of QDs.…”

Section: Introductionmentioning

confidence: 99%

Determination of Paracetamol Based on its Quenching Effect on the Photoluminescence of CdTe Fluorescence Probes

Ding

Cheng

et al. 2011

J Fluoresc

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L-Cysteine capped CdTe nanoparticles (NPs) were synthesized in aqueous medium, and their application as fluorescence probes in the determination of paracetamol was studied. The L-cysteine capped CdTe NPs were characterized by transmission electron microscopy, X-ray diffraction spectrometry, spectrofluorometry, ultraviolet-visible and Fourier transform infrared spectrometry. Based on the distinct fluorescence quenching of CdTe fluorescence probes in the presence of paracetamol, a simple, rapid and specific method for paracetamol determination was presented. Under optimum conditions, the relative fluorescence intensity of CdTe NPs was linearly proportional to paracetamol concentration from 1.0 × 10(-8) mol/L to 1.6 × 10(-7) mol/L with a detection limit of 4.2 × 10(-9) mol/L. The proposed method was applied to detect paracetamol in commercial tablets with satisfactory results.

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Quantum dot-based “turn-on” fluorescent probe for detection of zinc and cadmium ions in aqueous media

Cited by 144 publications

References 54 publications

Dithizone-etched CdTe nanoparticles-based fluorescence sensor for the off–on detection of cadmium ion in aqueous media

Dithizone-etched CdTe nanoparticles-based fluorescence sensor for the off–on detection of cadmium ion in aqueous media

A new thio-Schiff base fluorophore with copper ion sensing, DNA binding and nuclease activity

Determination of Paracetamol Based on its Quenching Effect on the Photoluminescence of CdTe Fluorescence Probes

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