Abstract
NaYF4:Yb,Er upconversion nanoparticles are obtained via hydrothermal synthesis. To give nanoparticles hydrophilic properties without major changes in their photophysical characteristics, their surfaces have been modified by replacing the oleate shell with L-cysteine molecules. No fading of the luminescence of the modified upconversion nanoparticles is observed for months.
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Funding
Our spectroscopic study was supported by the Russian Science Foundation (project no. 23-42-10012, https://rscf.ru/project/23-42-10012/). The low-temperature measurements were made as part of a State Task for the Federal Research Center “Kazan Scientific Center,” Russian Academy of Sciences.
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Translated by E. Bondareva
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Mityushkin, E.O., Zharkov, D.K., Leontyev, A.V. et al. Hydrothermal Synthesis of NaYF4:Yb,Er Upconversion Nanoparticles and Modification of Their Surfaces for Biosensing. Bull. Russ. Acad. Sci. Phys. 87, 1806–1811 (2023). https://doi.org/10.1134/S1062873823704105
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DOI: https://doi.org/10.1134/S1062873823704105