A comparative study between the simulated and measured cathodoluminescence generated in ZnS:Cu, Al, Au phosphor powder

Chen, S.H.; Greeff, Abraham P.; Swart, H.C.

doi:10.1016/j.jlumin.2004.09.124

Cited by 10 publications

(7 citation statements)

References 17 publications

(22 reference statements)

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“…The selectivity is enhanced because it is a less usual phenomenon than that of fluorescence . The delayed luminescence lifetimes of dopants and host semiconductors have been studied in a number of doped semiconductor systems. – Doped semiconductors have also been employed as phosphor powders for color displays. – Nevertheless, QDs have seldom been explored for RTP detection in aqueous solution …”

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confidence: 99%

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Exploring Mn-Doped ZnS Quantum Dots for the Room-Temperature Phosphorescence Detection of Enoxacin in Biological Fluids

2008

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While most research works focus on the development of quantum dots (QDs)-based fluorescence sensors, much less attention is paid to the phosphorescence properties of QDs and their potential for phosphorescence detection. In this work, the phosphorescence property of Mn-doped ZnS QDs is explored to develop a novel room-temperature phosphorescence (RTP) method for the facile, rapid, cost-effective, sensitive, and selective detection of enoxacin in biological fluids. The Mn-doped ZnS QDs-based RTP method reported here does not need the use of deoxidants and other inducers and allows the detection of enoxacin in biological fluids without interference from autofluorescence and the scattering light of the matrix. The Mn-doped ZnS QDs offer excellent selectivity for detecting enoxacin in the presence of the main relevant metal ions in biological fluids, biomolecules, and other kinds of antibiotics. Quenching of the phosphorescence emission due to the addition of enoxacin at 1.0 microM is unaffected by 5000-fold excesses of Na (+) and 10000-fold excesses of K (+), Mg (2+), and Ca (2+). Amino acids such as tryptophan, histidine, and l-cysteine at 1000-fold concentration of enoxacin do not affect the detection of enoxacin. Glucose does not affect the detection at 10000-fold concentration of enoxacin. Typical coadministers (mainly other types of antibiotics) such as ceftezole, cefoperazone, oxacillin, and kalii dehydrographolidi succinas are permitted at 50-, 10-, 100-, and 50-fold excesses, respectively, without interference with the detection of enoxacin. The precision for 11 replicate detections of 0.4 microM enoxacin is 1.8% (RSD). The detection limit for enoxacin is 58.6 nM. The recovery of spiked enoxacin in human urine and serum samples ranges from 94 to 104%. The developed Mn-doped ZnS QDs-based RTP method is employed to monitor the time-dependent concentration of enoxacin in urine from a healthy volunteer after the oral medication of enoxacin. The investigation provides evidence that doped QDs are promising for RTP detection in further applications.

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“…[13][14][15] phosphor powders for color displays. [16][17][18] Nevertheless, QDs have seldom been explored for RTP detection in aqueous solution. 19 Herein, we report Mn-doped ZnS QDs for the RTP detection of enoxacin in biological fluids.…”

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confidence: 99%

Exploring Mn-Doped ZnS Quantum Dots for the Room-Temperature Phosphorescence Detection of Enoxacin in Biological Fluids

2008

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“…The resultant ZnO crystals, which are inherently colorless, are colored as a result of the inclusion of tiny Al 2 S 3 particles (light yellow). Swart et al [87][88][89] have reported the formation of a ZnO film (nm in thickness) on the surface of ZnS phosphor particles. In their experiments, powdered ZnS samples were subjected to electron bombardment (2 kV, 2 mA cm À2 ) at a residual gas pressure of 10 À8 Torr and oxygen pressures of 10 À6 Torr.…”

Section: Formation Of Microcrystals and Thin Films Of Zno In/on Zns P...mentioning

confidence: 99%

Cathodoluminescent phosphors

Itoh

Ozawa²

2006

Annu. Rep. Prog. Chem., Sect. C: Phys. Chem.

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This review outlines the general properties of cathodoluminescent phosphors, especially of ZnS : Ag : Cl (blue), ZnS : Cu : Al (green) and Y 2 O 2 S : Eu (red). These phosphors, having an average particle size of 4 mm, are particularly important in the production of full-color cathodoluminescence display devices such as cathode ray tubes. The growth mechanism of ZnS phosphors with fluxes is also discussed on the basis of recent study. It is emphasized that screenable phosphor particles with chemically clean surfaces provide an optimized image quality for viewers. Furthermore, future prospects for nano-and submicron-sized phosphor particles are considered in connection with the application to field emission displays.

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“…[21][22][23] Doped semiconductors have also been employed as phosphor powders for colour displays. [24][25][26] Nevertheless, QDs have seldom been explored for RTP detection in aqueous solution. 27 Herein, we introduce Mn/ZnS@SiO 2 -NH 2 as a phosphorescent probe for the determination of GO in environmental water samples using RTP technology.…”

Section: Introductionmentioning

confidence: 99%

Amino-functionalized silica-encapsulated Mn/ZnS quantum dots for the room-temperature phosphorescence determination of graphene oxide in environmental water samples

Zhong

Wang

et al. 2015

Anal. Methods

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ARTICLE This journal isWe developed a simple and sensitive room-temperature phosphorescence (RTP) method for the determination of graphene oxide (GO) in environmental water samples using aminofunctionalized silica-encapsulated Mn/ZnS Quantum Dots (Mn/ZnS@SiO 2 -NH 2 ) as a phosphorescence probe. The maximum phosphorescence excitation and emission wavelength of synthesized Mn/ZnS@SiO 2 -NH 2 nanoparticles were 320 nm and 595 nm. The RTP intensity of Mn/ZnS@SiO 2 -NH 2 nanoparticles could be quenched in the presence of GO with a detection limit as low as 1.0 mg·L -1 . Good linear correlations were obtained over the concentration range from 0 to 10.0 mg·L -1 with a correlation coefficient of 0.9987, 10.0 to 25.0 mg·L -1 with a correlation coefficient of 0.9979. The phosphorescence quenching mechanism was also discussed. This method was successfully applied to the determination of GO in environmental water samples which presages more opportunities for application in biological and environmental systems.

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A comparative study between the simulated and measured cathodoluminescence generated in ZnS:Cu, Al, Au phosphor powder

Cited by 10 publications

References 17 publications

Exploring Mn-Doped ZnS Quantum Dots for the Room-Temperature Phosphorescence Detection of Enoxacin in Biological Fluids

Exploring Mn-Doped ZnS Quantum Dots for the Room-Temperature Phosphorescence Detection of Enoxacin in Biological Fluids

Cathodoluminescent phosphors

Amino-functionalized silica-encapsulated Mn/ZnS quantum dots for the room-temperature phosphorescence determination of graphene oxide in environmental water samples

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