Sensitization of photoprocesses in colloidal Ag2S quantum dots by dye molecules

Oleg V. Ovchinnikov; Tamara S. Kondratenko; Irina G. Grevtseva; Mikhail S. Smirnov; Sergey I. Pokutnyi

doi:10.1117/1.JNP.10.033505

2 March 2016 Sensitization of photoprocesses in colloidal Ag₂S quantum dots by dye molecules

Oleg V. Ovchinnikov, Tamara S. Kondratenko, Irina G. Grevtseva, Mikhail S. Smirnov, Sergey I. Pokutnyi

Author Affiliations +

Journal of Nanophotonics, Vol. 10, Issue 3, 033505 (March 2016). https://doi.org/10.1117/1.JNP.10.033505

Abstract

The effect of photosensitization of IR luminescence excitation (1205 nm) of colloidal Ag₂S quantum dots (QDs) with average size of 2.5±0.6 nm in gelatin at 600 to 660 nm by molecules of 3,3’-di-(γ-sulfopropyl)-4,4’,5,5’-dibenzo-9-ethylthiacarbocyanine betaine pyridinium salt (Dye1) and thionine dye (Dye2) was registered. Cis-J-aggregates of Dye1 and cations monomer of Dye2 conjugated with Ag₂S QDs take part in this process. The photosensitization of luminescence excitation of colloidal Ag₂S QDs was interpreted by resonance nonradiation transfer of electronic excitation energy from cis-J-aggregates of Dye1 and cations of Dye2 to centers of recombination luminescence of Ag₂S QDs.

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Oleg V. Ovchinnikov, Tamara S. Kondratenko, Irina G. Grevtseva, Mikhail S. Smirnov, and Sergey I. Pokutnyi "Sensitization of photoprocesses in colloidal Ag₂S quantum dots by dye molecules," Journal of Nanophotonics 10(3), 033505 (2 March 2016). https://doi.org/10.1117/1.JNP.10.033505

Published: 2 March 2016

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