Fluorescent probe for detection of Cu2+ using core‐shell CdTe/ZnS quantum dots |
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| Authors: | Wei Bian Fang Wang Hao Zhang Lin Zhang Li Wang Shaomin Shuang |
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| Institution: | 1. School of Basic Medical Science, Shanxi Medical University, Taiyuan, People's Republic of China;2. College of Pharmacy, Shanxi Medical University, Taiyuan, People's Republic of China;3. Department of Chemistry and Chemical Engineering, Research Center of Environmental Science and Engineering, Shanxi University, Taiyuan, People's Republic of China |
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| Abstract: | Core‐shell CdTe/ZnS quantum dots capped with 3‐mercaptopropionic acid (MPA) were successfully synthesized in aqueous medium by hydrothermal synthesis. These quantum dots have advantages compared to traditional quantum dots with limited biological applications, high toxicity and tendency to aggregate. The concentration of Cu2+ has a significant impact on the fluorescence intensity of quantum dots (QDs), therefore, a rapid sensitive and selective fluorescence probe has been proposed for the detection of Cu2+ in aqueous solution. Under optimal conditions, the fluorescence intensity of CdTe/ZnS QDs was linearly proportional to the concentration of Cu2+ in the range from 2.5 × 10–9 M to 17.5 × 10–7 M with the limit of 1.5 × 10–9 M and relative standard deviation of 0.23%. The quenching mechanism is static quenching with recoveries of 97.30–102.75%. Copyright © 2015 John Wiley & Sons, Ltd. |
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| Keywords: | Fluorescence probe CdTe/ZnS QDs detection ion |
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