Comparative Analysis of Methods for Enhancement of the Photostability of CdTe@TGA QD Colloid Solutions

Tsipotan, A. S.; Gerasimova, M. A.; Polyutov, Sergey; Aleksandrovsky, A.S.; Slabko, V. V.

doi:10.1021/acs.jpcb.7b03166

Cited by 4 publications

(2 citation statements)

References 41 publications

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“…Одной из фундаментальных проблем, возникающих на пути прикладного использования КТ в приложениях, построенных на люминесценции, является ее деградация под действием фотовозбуждающих квантов . Отмечено существенное влияние нестехиометрии соединения, из которого синтезированы КТ [11][12][13][14][15][16][17][18]. Фотодеградация ИК люминесценции неоднократно наблюдалась в коллоидных КТ Ag 2 S, состав которых обладает высокой степенью нестехиометрии [21][22][23][24][25][26][27][28].…”

Section: Introductionunclassified

Фотостабильность люминесценции квантовых точек Ag-=SUB=-2-=/SUB=-S и структур ядро/оболочка Ag-=SUB=-2-=/SUB=-S/SiO-=SUB=-2-=/SUB=-

Grevtseva¹,

Овчинников²,

Смирнов³

et al. 2022

Оптика И Спектроскопия

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The paper presents regularities that demonstrate the effect of passivating ligands formation of thioglycolic acid and L-cysteine (TGA, L-Cys) and dielectric shells (SiO2) on Ag2S nanocrystals interface on the photostability of their IR luminescence. Using FTIR absorption spectroscopy, the interaction manifestations of passivating ligands molecules of TGA and L-Cys with Ag2S nanocrystals, as well as the formation of SiO2 shell due to the process of replacing organic ligands with a silica ligand (MPTMS) ("ligand exchange"), were found. In the case of replacing TGA with MPTMS, an increase in the luminescence quantum yield of Ag2S quantum dots (QDs) and its resistance to long-term exposure to exciting radiation was found. In the case of replacing L-Cys with MPTMS, the formation of a fragmentary SiO2/L-Cys shell on Ag2S nanocrystals was observed due to the partial replacement of L-Cys with MPTMS, which contributes to the reverse photodegradation of Ag2S QDs luminescence of as a result of SiO2/L-Cys shell photodestruction.

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Section: Introductionunclassified

Фотостабильность люминесценции квантовых точек Ag-=SUB=-2-=/SUB=-S и структур ядро/оболочка Ag-=SUB=-2-=/SUB=-S/SiO-=SUB=-2-=/SUB=-

Grevtseva¹,

Овчинников²,

Смирнов³

et al. 2022

Оптика И Спектроскопия

View full text Add to dashboard Cite

show abstract

“…One of the fundamental problems that arise in the way of the applied use of QDs in applications based on luminescence is its degradation under the action of photoexciting quanta . A significant influence of the non-stoichiometry of the compound from which QDs [11][12][13][14][15][16][17][18] were synthesized was noted. Photodegradation of IR luminescence has been repeatedly observed in colloidal Ag 2 S QDs, the composition of which has a high degree of non-stoichiometry [21][22][23][24][25][26][27][28].…”

Section: Introductionmentioning

confidence: 99%

Photostability of luminescence of Ag-=SUB=-2-=/SUB=-S quantum dots and Ag-=SUB=-2-=/SUB=-S/SiO-=SUB=-2-=/SUB=- core/shell structures

I.G.

O.V.

M.S.

et al. 2022

Optics and Spectroscopy

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The paper presents regularities that demonstrate the effect of passivating ligands formation of thioglycolic acid and L-cysteine (TGA, L-Cys) and dielectric shells (SiO2) on Ag2S nanocrystals interface on the photostability of their IR luminescence. Using FTIR absorption spectroscopy, the interaction manifestations of passivating ligands molecules of TGA and L-Cys with Ag2S nanocrystals, as well as the formation of SiO2 shell due to the process of replacing organic ligands with a silica ligand (MPTMS) ("ligand exchange"), were found. In the case of replacing TGA with MPTMS, an increase in the luminescence quantum yield of Ag2S quantum dots (QDs) and its resistance to long-term exposure to exciting radiation was found. In the case of replacing L-Cys with MPTMS, the formation of a fragmentary SiO2/L-Cys shell on Ag2S nanocrystals was observed due to the partial replacement of L-Cys with MPTMS, which contributes to the reverse photodegradation of KT Ag2S luminescence of as a result of SiO2/L-Cys shell photodestruction. Keywords: photoluminescence, luminescence photostability, quantum yield, quantum dot, core/shell structures, FTIR spectroscopy.

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Effect of Ag$$_{2}$$S/SiO$$_{2}$$ QDs surface structure on luminescence photostability

et al. 2023

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Comparative Analysis of Methods for Enhancement of the Photostability of CdTe@TGA QD Colloid Solutions

Cited by 4 publications

References 41 publications

Фотостабильность люминесценции квантовых точек Ag-=SUB=-2-=/SUB=-S и структур ядро/оболочка Ag-=SUB=-2-=/SUB=-S/SiO-=SUB=-2-=/SUB=-

Фотостабильность люминесценции квантовых точек Ag-=SUB=-2-=/SUB=-S и структур ядро/оболочка Ag-=SUB=-2-=/SUB=-S/SiO-=SUB=-2-=/SUB=-

Photostability of luminescence of Ag-=SUB=-2-=/SUB=-S quantum dots and Ag-=SUB=-2-=/SUB=-S/SiO-=SUB=-2-=/SUB=- core/shell structures

Effect of Ag$$_{2}$$S/SiO$$_{2}$$ QDs surface structure on luminescence photostability

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