Open AccessLuminescent properties of colloidal mixtures of Zn0.5Cd0.5S quantum dots and gold nanoparticles
Author(s) -
O. V. Ovchinnikov,
M. S. Smirnov,
И. Г. Гревцева,
Violetta N. Derepko,
T. A. Chevychelova,
L. Yu. Leonova,
T. S. Kondratenko
Publication year - 2021
Publication title -
kondensirovannye sredy i mežfaznye granicy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.13
H-Index - 2
eISSN - 2687-0711
pISSN - 1606-867X
DOI - 10.17308/kcmf.2021.23/3302
Subject(s) - luminescence , quantum dot , nanoparticle , materials science , exciton , colloid , nanotechnology , spectroscopy , transmission electron microscopy , chemical physics , analytical chemistry (journal) , chemical engineering , optoelectronics , chemistry , condensed matter physics , physics , organic chemistry , quantum mechanics , engineering
The aim of the study is to establish spectral-luminescent interaction effects in mixtures of colloidal Zn0.5Cd0.5S quantum dots passivated with 2-mercaptopropionic acid and Au and Au/SiO2nanoparticles. The studied samples of Zn0.5Cd0.5S quantum dots, Au and Au/SiO2 nanoparticles and their mixtures were obtained by methods of colloidal synthesis and were characterised using transmission electron microscopy. The absorption, luminescence and time-resolved luminescence spectroscopy were used as the main investigation methods. The measurements were carried out at temperatures of 77 K and 300 K. The spectral-luminescent properties of “free” Zn0.5Cd0.5S quantum dots and those interacting with Au and Au/SiO2 nanoparticles were compared. It was found that the luminescence properties of Zn0.5Cd0.5S quantum dots can be controlled under conditions of changing plasmon-exciton coupling achieved during the formation of a dielectric SiO2 shell on the surface of Au nanoparticles as well as a result of a polymer introduced into the colloidal mixture.