Formation of Plasmon–Exciton Nanostructures upon Decorating Ag2S/SiO2 Quantum Dots with Au Nanoparticles

The formation of plexcitonic nanostructures upon decorating the surface of Ag 2 S/SiO 2 quantum dots with small Au nanoparticles (around 2.0 ± 0.5 nm) is confirmed spectroscopically. It is established via IR spectroscopy that two mechanisms which depend on the charge state of the Au nanoparticle sur...

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Published inBulletin of the Russian Academy of Sciences. Physics Vol. 86; no. 6; pp. 692 - 695
Main Authors Grevtseva, I. G., Ovchinnikov, O. V., Smirnov, M. S., Tikhomirov, S. A., Ponyavina, A. N., Binh, Nguyen Thanh, Minh, Pham Hong, Turishchev, S. Yu, Chuvenkova, O. A.
Format Journal Article
LanguageEnglish
Published Moscow Pleiades Publishing 01.06.2022
Springer Nature B.V
Subjects
Excitons
Gold
Hadrons
Heavy Ions
Infrared spectroscopy
Nanoparticles
Nanostructure
Nuclear Physics
Physics
Physics and Astronomy
Quantum dots
Silicon dioxide
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Summary:The formation of plexcitonic nanostructures upon decorating the surface of Ag 2 S/SiO 2 quantum dots with small Au nanoparticles (around 2.0 ± 0.5 nm) is confirmed spectroscopically. It is established via IR spectroscopy that two mechanisms which depend on the charge state of the Au nanoparticle surfaces participate in the adsorption of Au nanoparticles on the surfaces of Ag 2 S/SiO 2 quantum dots. It is shown that the formation of such nanostructures results in a tenfold increase in the luminescence quantum yield of Ag 2 S/SiO 2 quantum dots.
ISSN:1062-8738
1934-9432
DOI:10.3103/S1062873822060144