5th Memorial Symposium "Molecular Photonics" dedicated to the memory of Academician A.N.Terenin, May 6, 2021 St. Petersburg, Russia
Nanophotonics

Luminescence photomodulation of nanospheres with CdSe/ZnS quantum dots in polymer films

P. V. Karpach^a, G. T. Vasilyuk^a, O. V. Venidiktova^b, V. A. Barachevskiĭ^b, A. R. Tuktarov^c, S. A. Maskevich^d, M. V. Artem'ev<sup>e

a</sup> Yanka Kupala State University of Grodno, 230023 Grodno, Belarus
^b Photochemistry Center, Russian Academy of Sciences, 119421 Moscow, Russia
^c Institute of Petrochemistry and Catalysis, Russian Academy of Sciences, 450075 Ufa, Bashkortostan, Russia
^d Belarusian State University, ISEI BSU, 220070 Minsk, Belarus
^e Research Institute for Physical Chemical Problems of the Belarussian State University, 220030 Minsk, Belarus

Abstract: The results of studies of the spectral-kinetic (absorption and fluorescent) characteristics of the polymer nanospheres created by us (containing luminescent inorganic CdSe/ZnS quantum dots and photochromic diarylethene molecules) incorporated into a polymer film are presented. A reversible modulation of the fluorescence intensity of quantum dots, caused by the photoisomerization of diarylethene molecules, was found. It is shown that nanospheres in polymer matrices exhibit higher efficiencies of both photoinduced modulation of QD radiation and Förster resonance energy transfer (FRET) from QDs to the cyclic isomer of DAE as compared to solutions. The results can be used, for example, to create luminescent photocontrolled panels based on films containing fluorescent nanoparticles.

Keywords: photochromism, fluorescence, quantum dot, Förster resonance energy transfer, polymer nanospheres, polymer films

Received: 29.12.2021
Revised: 22.01.2022
Accepted: 11.02.2022

DOI: 10.21883/OS.2022.05.52428.6-22

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