Plasmon-enhanced luminescence of S,N-doped carbon dots

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Authors

Niyazbek Ibrayev¹ , Evgeniya Seliverstova¹ , Gulnur Amanzholova¹

Conference / event: 8th Asian Symposium on Advanced Materials (ASAM-8), July 2023 (Novosibirsk, Russian Federation)

Poster summary: The effect of plasmonic nanoparticles (NPs) of Ag on the properties of fast and long-lived luminescence of CDs films with various compositions was studied, which was varied by changing the ratio of citric acid and L-cysteine. The synthesis of CDs was performed by microwave synthesis method. The molar ratio of citric acid:L-cysteine was equal to 1:0, 1:0.5 and 1:1. Under the plasmonic effect of silver NPs, the intensity of absorption and luminescence of carbon dots films increases. The greatest enhancement effect of both fluorescence and long-lived luminescence was registered for 1:1 carbon dots and it was equal to 1.6 and 2.7 times, respectively. The decreasing luminescence lifetime indicates an increase in the radioactive decay rate of the excited electronic singlet and triplet states of carbon dots.

Keywords: S,N-doped carbon dots, Silver island films, Plasmon effect, Luminescence

Funding

This research is funded by the Science Committee of the Ministry of Science and Higher Education of the Republic of Kazakhstan (No. AP09259913)

Additional information

Data availability statement: The datasets generated during and / or analyzed during the current study are available from the corresponding author on reasonable request.

Creative Commons license: Copyright © 2023 Ibrayev et al. This is an open access work distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.