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surface-enhanced-energy-transfer
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Selective fluorometric determination of sulfadiazine based on the growth of silver nanoparticles on graphene quantum dots
, Article Microchimica Acta ; Volume 187, Issue 1 , 2020 ; Haji Shabani, A. M ; Dadfarnia, S ; Kazemi, E ; Sharif University of Technology
Springer
2020
Abstract
A sensitive fluorometric assay is described for the direct determination of the antibiotic sulfadiazine. Silver nanoparticles placed on graphene quantum dots (Ag NP-GQDs) were synthesized by reduction of AgNO3 with sodium borohydride in the presence of GQDs. The growth of Ag NPs on the surface of the GQDs causes quenching of the blue fluorescence of the GQDs with an emission maximum at 470 nm by surface-enhanced energy transfer. If sulfadiazine is added, it interacts with Ag NPs and fluorescence is restored. Under optimal conditions, the fluorescence increases linearly in the sulfadiazine concentration range of 0.04–22.0 μM. The detection limit is 10 nM with relative standard deviations of...