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Aqueous Synthesis of CdTe Quantum Dots by Hydride Generation for Visual Detection of Silver on Quantum Dots Immobilized Paper

Abstract

A novel visual detection method was developed for silver using CdTe quantum dots (QDs) immobilized paper. CdTe QDs was synthesized in aqueous solution by hydride generation (HG) for the first time, with H2Te gas introducing into the aqueous medium containing Cd2+ ions. The gaseous precursors, H2Te, is generated on-line by reducing TeO32- with KBH4. The visible fluorescence from the CdTe QDs immobilized on paper was quenched by Ag+. A limit of detection (LOD) of 0.01 μg mL-1 and a relative standard deviation (RSD, n=7) of 2.1% at a concentration of 1 μg mL-1 of Ag+ were obtained when using a commercial fluorescence spectrophotometer as the detector. In visual detection, as low as 1 μg mL-1 of Ag+ in antibacterial textiles and drugs can be easily discriminated from the blank with the naked eye. The proposed method retains several unique advantages, including straightforward, rapid, affordable and equipment-free for visual detection.

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Publication details

The article was received on 12 Jul 2017, accepted on 08 Aug 2017 and first published on 09 Aug 2017


Article type: Paper
DOI: 10.1039/C7AY01705G
Citation: Anal. Methods, 2017, Accepted Manuscript
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    Aqueous Synthesis of CdTe Quantum Dots by Hydride Generation for Visual Detection of Silver on Quantum Dots Immobilized Paper

    K. Huang, R. Dai, W. Deng, L. Lin, A. Zhang and X. Yuan, Anal. Methods, 2017, Accepted Manuscript , DOI: 10.1039/C7AY01705G

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