Journal
JOURNAL OF FLUORESCENCE
Volume 25, Issue 1, Pages 41-48Publisher
SPRINGER/PLENUM PUBLISHERS
DOI: 10.1007/s10895-014-1476-y
Keywords
Ag2Se/ZnSe; Quantum dots; Fluorescence sensors
Funding
- National Key Basic Research Program of China [2015CB352002]
- National Natural Science Foundation of China [61475034, 21104009, 21403034, 61177033]
- Fundamental Research Funds for the Central Universities [2242014R30006]
- natural science foundation of Jiangsu Province Youth Fund [BK20140650]
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We reported the synthesis of water-soluble and nontoxic Ag2Se/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, Ag2Se/ZnSe QDs show a single emission peak around 490 nm with the maximal photoluminescence (PL) quantum yield (QYs) of 13.7 %. As-prepared Ag2Se/ZnSe QDs can be used for detection of Ag(II) and Cu(II). The detection limits are 1 x 10(-6) mol/L to 5 x 10(-5) mol/L for Ag (I), and 2 x 10(-6) mol/L to 1.10 x 10(-4) mol/L for Cu(II).
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