Jump to main content
Jump to site search


Enzyme-free fluorescence sensing of catechins in green tea using bifunctional graphene quantum dots

Abstract

The fluorescent graphene quantum dots (GQDs) provide an amusing nanoplatform which integrates uique optical properties of quantum dots and prominent electronic properties of carbon materials. However, rational design of dual functional GQDs is little explored. In this paper, we constructed an enzyme-free fluorescent sensing for catechins in green tea by using bifunctional GQDs which were employed as peroxidase-like catalyst and a fluorescence probe. In the presence of dissolved oxygen, GQDs with intrinsic peroxidase-like catalytic activity could catalyze the oxidation of catechins and the oxidation product could efficiently quench GQDs’ fluorescence. Based on this finding, an enzyme-free fluorescent nanoplatform was proposed for the sensing of catechins, and the detection limit of 5.0 nM is found. The integration the excellent fluorescent performance of GQDs and their high catalytic activity made this sensor a simple and sensitive method for catechins detection.

Back to tab navigation
Please wait while Download options loads

Publication details

The article was received on 13 Apr 2017, accepted on 17 May 2017 and first published on 17 May 2017


Article type: Paper
DOI: 10.1039/C7AY00973A
Citation: Anal. Methods, 2017, Accepted Manuscript
  •   Request permissions

    Enzyme-free fluorescence sensing of catechins in green tea using bifunctional graphene quantum dots

    J. Sun, Y. He and L. Wang, Anal. Methods, 2017, Accepted Manuscript , DOI: 10.1039/C7AY00973A

Search articles by author