Aqueous Synthesis of Nontoxic Ag sub(2)Se/ZnSe Quantum Dots Designing as Fluorescence Sensors for Detection of Ag(I) and Cu(II) Ions

We reported the synthesis of water-soluble and nontoxic Ag sub(2)Se/ZnSe Quantum Dots (QDs) using for fluorescence sensors. The influences of various experimental conditions including the synthesis pH, types of ligand, feed ratios, and the refluxed time on the growth process and fluorescence of QDs...

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Published inJournal of fluorescence Vol. 25; no. 1; pp. 41 - 48
Main Authors Wang, Chunlei, Xu, Shuhong, Zhao, Zengxia, Wang, Zhuyuan, Cui, Yiping
Format Journal Article
LanguageEnglish
Published 01.01.2015
Subjects
Emission
Fluorescence
Ligands
Optimization
Quantum dots
Sensors
Synthesis
Zinc selenides
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Summary:We reported the synthesis of water-soluble and nontoxic Ag sub(2)Se/ZnSe Quantum Dots (QDs) using for fluorescence sensors. The influences of various experimental conditions including the synthesis pH, types of ligand, feed ratios, and the refluxed time on the growth process and fluorescence of QDs were investigated in detail. Under optimal conditions, Ag sub(2)Se/ZnSe QDs show a single emission peak around 490 nm with the maximal photoluminescence (PL) quantum yield (QYs) of 13.7 %. As-prepared Ag sub(2)Se/ZnSe QDs can be used for detection of Ag(II) and Cu(II). The detection limits are 1 10 super(-6) mol/L to 5 10 super(-5) mol/L for Ag (I), and 2 10 super(-6) mol/L to 1.10 10 super(-4) mol/L for Cu(II).
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ISSN:1053-0509
1573-4994
DOI:10.1007/s10895-014-1476-y