Journal
MICROCHIMICA ACTA
Volume 169, Issue 1-2, Pages 109-115Publisher
SPRINGER WIEN
DOI: 10.1007/s00604-010-0323-3
Keywords
CdTe Quantum dots; Fluorescence quenching; Bisphenol A detection; Cysteamine
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Funding
- National Natural Science Foundation of China [30972044]
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Cadmium telluride quantum dots (QDs) were prepared and coated with cysteamine using ultrasonic irradiation. The QDs were characterized by fluorescence spectroscopy, UV-vis absorption spectra, X-ray diffraction and infrared spectroscopy. The QDs possess a quantum yield as high as 46% and a quite narrow emission band (full width at half maximum of 38 nm). The fluorescence of these QDs is quenched by bisphenol A (BPA), and quenching can be described by a Stern-Volmer equation with correlation coefficient of 0.998. These findings resulted in a simple and rapid technique for determination of BPA that was applied to its determination in feeding bottles.
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