The luminescence photostability of carbon nanodots synthesized by the plasma method from a glucose solution after UV radiation

A. A. Tyutrin^ab, A. L. Rakevich^a, E. F. Martynovich<sup>ba

a</sup> Institute of Lazer Physics of Russian Academy of Sciences, Irkutsk Branch, Irkutsk, Russia
^b Irkutsk State University, Irkutsk, Russia

Abstract: Carbon nanodots (CNDs) were synthesized by the microplasma method using a glucose solution as a precursor. The photoluminescence of CNDs before and after UV irradiation was studied. The spectral and kinetic properties of the synthesized CNDs were studied using a MicroTime 200 confocal scanning luminescence microscope. It was experimentally demonstrated that the short component $(\tau_1)$ of luminescence refers to C=O bonds on the CND surface. A significant decrease in the luminescence intensity of CNDs after UV irradiation due to a decrease in oxygen-containing groups on the surface of carbon dots was found.

Keywords: luminescence, carbon nanodots, photostability, time-correlated photon counting.

Received: 14.11.2022
Revised: 21.12.2022
Accepted: 29.12.2022

DOI: 10.21883/PJTF.2023.06.54807.19427

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