Dihydrolipoic acid coated alloyed quantum dots

Daniil D. Drozd; Pavel S. Pidenko; Kirill Yu. Presnyakov; Pavel D. Strokin; Elena S. Speranskaya; Irina Yu. Goryacheva

doi:10.1117/12.2564393

9 April 2020 Dihydrolipoic acid coated alloyed quantum dots

Daniil D. Drozd, Pavel S. Pidenko, Kirill Yu. Presnyakov, Pavel D. Strokin, Elena S. Speranskaya, Irina Yu. Goryacheva

Author Affiliations +

Proceedings Volume 11457, Saratov Fall Meeting 2019: Optical and Nano-Technologies for Biology and Medicine; 1145714 (2020) https://doi.org/10.1117/12.2564393
Event: Saratov Fall Meeting 2019: VII International Symposium on Optics and Biophotonics, 2019, Saratov, Russian Federation

Abstract

Alloyed quantum dots (QDs) are the popular material for the fabrication of the light-emitting diodes because of their optical parameters advantages. One of the most interesting features peculiar to this QDs class is the ability to controlled size-independent emission peak tuning via compound amounts changing. The same advantages can be valuable in bioanalytical methods and sensor systems development. Facile one-pot synthesis of the bright quaternary alloyed QDs made by Cd_xZn_1-xSe_yS_1-y/ZnS semiconductor composition with narrow (FWHM < 26 nm) emission peak (548 nm) and photoluminescence quantum yield (PLQY) up to 50% was described. Obtained QDs were stabilized in water by the dihydrolipoic acid (DHLA) ligand exchange approach with insignificant PLQY loss relative initial (16%) and great colloidal stability period (6 months). This article summarizes the easiest ways of the alloyed QDs synthesis and subsequent hydrophilization for the potential simplification of their large-amounts manufacturing procedure.

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Daniil D. Drozd, Pavel S. Pidenko, Kirill Yu. Presnyakov, Pavel D. Strokin, Elena S. Speranskaya, and Irina Yu. Goryacheva "Dihydrolipoic acid coated alloyed quantum dots", Proc. SPIE 11457, Saratov Fall Meeting 2019: Optical and Nano-Technologies for Biology and Medicine, 1145714 (9 April 2020); https://doi.org/10.1117/12.2564393

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KEYWORDS

Zinc

Cadmium

Selenium

Magnesium

Nanocrystals

Quantum dots

Semiconductors

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