Guang-min LI, Hao-yang LIU, Yang YANG, et al. Fluorescence Interaction Between Folate Molecules and CdTe and CdTe/CdS Quantum Dots. [J]. Chinese Journal of Luminescence 42(12):1944-1950(2021)
Guang-min LI, Hao-yang LIU, Yang YANG, et al. Fluorescence Interaction Between Folate Molecules and CdTe and CdTe/CdS Quantum Dots. [J]. Chinese Journal of Luminescence 42(12):1944-1950(2021) DOI： 10.37188/CJL.20210257.
Fluorescence Interaction Between Folate Molecules and CdTe and CdTe/CdS Quantum Dots增强出版
Water soluble cysteine modified CdTe and CdTe/CdS core-shell quantum dots were prepared, which can realize the specific fluorescent labeling of folate molecules, and function as a fluorescent probe for detecting the concentration of folate. The experimental results showed that folate can cause obvious fluorescence quenching of CdTe quantum dots, but this quenching behavior was not observed in CdTe/CdS core-shell system. The fluorescence quenching mechanism was analyzed by Stern-Volmer equation, and the research showed that it was a static fluorescence quenching mechanism. The fluorescence emission spectrum had a blue shift of about 35 nm in the interaction between CdTe quantum dots and folate molecules. Thermodynamic calculation showed that a complex structure may be formed through electrostatic interaction between the quantum dots and folate molecules.
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