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In this paper, we report the synthesis of hydrophilic luminescent quantum dots (QDs) of the core/shell structure using two approaches: high-temperature organic synthesis of CdZnSeS/ZnS and aqueous synthesis of AgInS/ZnS. Dihydrolipoic and thioglycolic acids have been used as surface ligands to impart hydrophilic properties. The influence of whole blood and serum on the optical properties of both types of QDs was evaluated for their application in blood analysis. It has been shown that AgInS/ZnS QDs with emission in the red spectral region (λPL = 638 nm) remained the most stable in whole blood samples and its optimal dilutions (up to 1:100, inclusive). Whereas CdZnSeS/ZnS fluorescent in the green region of the spectrum (λPL = 530 nm) showed the best signal of fluorescence (PL) intensity in blood serum samples.
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Tatiana S. Ponomaryova, Anastasiya S. Novikova, Daniil D. Drozd, Pavel D. Strokin, Olga A. Goryacheva, Artem A. Bakal, Irina Y. Goryacheva, "Evaluation of the influence of the matrix effects of blood and serum on the optical properties of luminescent quantum dots," Proc. SPIE 12192, Optical Technologies for Biology and Medicine, 121920I (29 April 2022); https://doi.org/10.1117/12.2626115