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Optical properties of carbon dots in solvents with different polarity
Author(s): Evgeniia A. Stepanidenko; Irina A. Arefina; Sergei A. Cherevkov; Aliaksei Dubavik; Yuan Xiong; Alexander V. Baranov; Anatoly V. Fedorov; Elena V. Ushakova; Andrey L. Rogach
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Paper Abstract

Carbon dots are promising luminescent nanoparticles which possess unique optical properties together with the simplicity of their synthesis. The revealing of their energy level structure is a crucial for further implementation in various applications from biology to photonics. This work is devoted to the investigation of optical responses of citric acid-based carbon dots with respect to the chemical environment, as solvent polarity. Small spectral shifts of the luminescent and absorption bands for CDs are observed. Assuming the PL is originated from the emission of various luminescent centers in CDs we explain these shifts by their intensity redistribution within PL band in different solvents. The redistribution leads to blue shift of PL band in non-polar solvents, while in polar solvents strong dependence of PL band on polarity value is absent.

Paper Details

Date Published: 3 October 2019
PDF: 5 pages
Proc. SPIE 11207, Fourth International Conference on Applications of Optics and Photonics, 112071X (3 October 2019); doi: 10.1117/12.2527474
Show Author Affiliations
Evgeniia A. Stepanidenko, ITMO Univ. (Russian Federation)
Irina A. Arefina, ITMO Univ. (Russian Federation)
Sergei A. Cherevkov, ITMO Univ. (Russian Federation)
Aliaksei Dubavik, ITMO Univ. (Russian Federation)
Yuan Xiong, City Univ. of Hong Kong (Hong Kong, China)
Alexander V. Baranov, ITMO Univ. (Russian Federation)
Anatoly V. Fedorov, ITMO Univ. (Russian Federation)
Elena V. Ushakova, ITMO Univ. (Russian Federation)
Andrey L. Rogach, ITMO Univ. (Russian Federation)
City Univ. of Hong Kong (Hong Kong, China)


Published in SPIE Proceedings Vol. 11207:
Fourth International Conference on Applications of Optics and Photonics
Manuel Filipe P. C. M. Martins Costa, Editor(s)

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