Spectral properties of hybrid associates of colloidal quantum dots Zn0.5Cd0.5S, europium tenoyltrifluoroacetonate and methylene blue
Hybrid associates formed from colloidal Zn0.5Cd0.5S quantum dots, passivated with thioglycolic acid, europium tenoyltrioteracetonate and methylene blue molecules, absorption, luminescence, IR and time-resolved spectroscopy technique are studied. The shift of the IR absorption bands of COO- and C=O g...
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2018-01-01
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Series: | EPJ Web of Conferences |
Online Access: | https://doi.org/10.1051/epjconf/201819004017 |
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doaj-0f139538d6744e5b82507fd65c9a24ce2021-08-02T07:02:51ZengEDP SciencesEPJ Web of Conferences2100-014X2018-01-011900401710.1051/epjconf/201819004017epjconf_hbsm2018_04017Spectral properties of hybrid associates of colloidal quantum dots Zn0.5Cd0.5S, europium tenoyltrifluoroacetonate and methylene blueSmirnov Mikhail S.Perepelitsa Aleksey S.Kondratenko Tamara S.Zvyagin Andrey I.Ovchinnikov Oleg V.Hybrid associates formed from colloidal Zn0.5Cd0.5S quantum dots, passivated with thioglycolic acid, europium tenoyltrioteracetonate and methylene blue molecules, absorption, luminescence, IR and time-resolved spectroscopy technique are studied. The shift of the IR absorption bands of COO- and C=O groups of thioglycolic acid and europium thenoyltrifluoroacetonate has been detected. An increase in the efficiency of excitation of europium luminescence and a simultaneous increase lifetime of its luminescence upon adsorption on Zn0.5Cd0.5S quantum dots were found. Addition of methylene blue (thionine) molecules leads to quenching of the trap state luminescence of Zn0.5Cd0.5S and intracentric luminescence of Eu3+. A conclusion about the adsorption of Eu3+ on the surface of Zn0.5Cd0.5S quantum dots and the nonradiative energy transfer to methylene blue molecules was made.https://doi.org/10.1051/epjconf/201819004017 |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Smirnov Mikhail S. Perepelitsa Aleksey S. Kondratenko Tamara S. Zvyagin Andrey I. Ovchinnikov Oleg V. |
spellingShingle |
Smirnov Mikhail S. Perepelitsa Aleksey S. Kondratenko Tamara S. Zvyagin Andrey I. Ovchinnikov Oleg V. Spectral properties of hybrid associates of colloidal quantum dots Zn0.5Cd0.5S, europium tenoyltrifluoroacetonate and methylene blue EPJ Web of Conferences |
author_facet |
Smirnov Mikhail S. Perepelitsa Aleksey S. Kondratenko Tamara S. Zvyagin Andrey I. Ovchinnikov Oleg V. |
author_sort |
Smirnov Mikhail S. |
title |
Spectral properties of hybrid associates of colloidal quantum dots Zn0.5Cd0.5S, europium tenoyltrifluoroacetonate and methylene blue |
title_short |
Spectral properties of hybrid associates of colloidal quantum dots Zn0.5Cd0.5S, europium tenoyltrifluoroacetonate and methylene blue |
title_full |
Spectral properties of hybrid associates of colloidal quantum dots Zn0.5Cd0.5S, europium tenoyltrifluoroacetonate and methylene blue |
title_fullStr |
Spectral properties of hybrid associates of colloidal quantum dots Zn0.5Cd0.5S, europium tenoyltrifluoroacetonate and methylene blue |
title_full_unstemmed |
Spectral properties of hybrid associates of colloidal quantum dots Zn0.5Cd0.5S, europium tenoyltrifluoroacetonate and methylene blue |
title_sort |
spectral properties of hybrid associates of colloidal quantum dots zn0.5cd0.5s, europium tenoyltrifluoroacetonate and methylene blue |
publisher |
EDP Sciences |
series |
EPJ Web of Conferences |
issn |
2100-014X |
publishDate |
2018-01-01 |
description |
Hybrid associates formed from colloidal Zn0.5Cd0.5S quantum dots, passivated with thioglycolic acid, europium tenoyltrioteracetonate and methylene blue molecules, absorption, luminescence, IR and time-resolved spectroscopy technique are studied. The shift of the IR absorption bands of COO- and C=O groups of thioglycolic acid and europium thenoyltrifluoroacetonate has been detected. An increase in the efficiency of excitation of europium luminescence and a simultaneous increase lifetime of its luminescence upon adsorption on Zn0.5Cd0.5S quantum dots were found. Addition of methylene blue (thionine) molecules leads to quenching of the trap state luminescence of Zn0.5Cd0.5S and intracentric luminescence of Eu3+. A conclusion about the adsorption of Eu3+ on the surface of Zn0.5Cd0.5S quantum dots and the nonradiative energy transfer to methylene blue molecules was made. |
url |
https://doi.org/10.1051/epjconf/201819004017 |
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