Journal
JOURNAL OF FLUORESCENCE
Volume 21, Issue 3, Pages 1131-1135Publisher
SPRINGER/PLENUM PUBLISHERS
DOI: 10.1007/s10895-010-0789-8
Keywords
ZnO QDs; Bromothymol blue; Fluorescence quenching
Funding
- National Natural Science Foundation of China [21005036, 20875042, 20805044, 20906043]
- Natural Science Foundation of Shandong Province [Y2008B18]
- Shandong Tai-Shan Scholar Research Fund
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We synthesized ZnO quantum dots (QDs) simply in alcoholic solution, and investigated the interaction between ZnO QDs and bromothymol blue. The structural, morphological, size and spectral properties of ZnO QDs were studied. It was found that ZnO QDs were spherical nanoparticles in the crystal structure, and the average diameter of ZnO QDs was about 4.8 nm. The excitation and emission peaks were located at 346 nm and 520 nm, respectively, which were obtained on a common fluorophotometer. The quantum yield of ZnO QDs was obtained by using quinine sulfate as a reference reagent. In addition, the fluorescence of ZnO QDs can be quenched by bromothymol blue, and the quenching mechanism was proposed in a dynamic quenching mode.
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