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The sensitive detection of ATP and ADA based on turn-on fluorescent copper/silver nanoclusters

Abstract

A simple turn-on fluorescence strategy is proposed for the detection of ATP based on DNA-stabilized copper/silver nanoclusters (DNA-Cu/Ag NCs). The fluorescence intensity of DNA-Cu/Ag NCs increases significantly in the presence of ATP, because the specific interaction between ATP and its aptamer causes two darkish Cu/Ag NCs to be situated at the 5′ and 3′ termini close to each other. A limit of detection (LOD) of 7.0 μM is found, in a linear range of 2–18 mM, and the proposed sensor is simple, sensitive, and selective. Additionally, the DNA-Cu/Ag NCs/ATP system is further developed into a sensor for ADA detection and demonstrates a linear response to ADA from 5 to 50 U/L with a LOD of 5 U/L. The proposed method is also shown to be successful in detecting ATP and ADA in a solution of fetal bovine serum.

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Acknowledgments

This work was supported by the National Natural Science Foundation of China (21171108).

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Correspondence to Chunying Wei.

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Zhang, B., Wei, C. The sensitive detection of ATP and ADA based on turn-on fluorescent copper/silver nanoclusters. Anal Bioanal Chem (2020). https://doi.org/10.1007/s00216-020-02476-0

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Keywords

  • DNA-Cu/Ag NCs
  • Aptamer
  • ATP
  • ADA
  • Fluorescence