Excitation Transfer in Hybrid Nanostructures of Colloidal Ag2S/TGA Quantum Dots and Indocyanine Green J-Aggregates

The regularities of the electron excitations exchange in hybrid associates of colloidal Ag 2 S quantum dots, passivated with thioglycolic acid (Ag 2 S/TGA QDs) with an average size of 2.2 and 3.7 nm with Indocyanine Green J-aggregates (ICG) were studied in this work by methods of absorption and lumi...

Full description

Saved in:
Bibliographic Details
Published in:Journal of fluorescence 2020-05, Vol.30 (3), p.581-589
Main Authors: Kondratenko, Tamara S., Smirnov, Mikhail S., Ovchinnikov, Oleg V., Grevtseva, Irina G.
Format: Article
Language:English
Subjects:
Aggregates
Analytical Chemistry
Biochemistry
Biological and Medical Physics
Biomedical and Life Sciences
Biomedicine
Biophysics
Biotechnology
Energy transfer
Excitation
Excitons
Infrared spectroscopy
Luminescence
Original Article
Quantum dots
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The regularities of the electron excitations exchange in hybrid associates of colloidal Ag 2 S quantum dots, passivated with thioglycolic acid (Ag 2 S/TGA QDs) with an average size of 2.2 and 3.7 nm with Indocyanine Green J-aggregates (ICG) were studied in this work by methods of absorption and luminescence spectroscopy. It was shown that IR luminescence sensitization of Ag 2 S/TGA QDs with an average size of 3.7 nm in the region of 1040 nm is possible due to non-radiative resonance energy transfer from Ag 2 S/TGA QDs with an average size of 2.2 nm and luminescence peak at 900 nm using ICG J-aggregate as an exciton bridge. The sensitization efficiency is 0.33. This technique provides a transition from the first therapeutic window (NIR-I, 700-950 nm) to the second (NIR-II, 1000-1700 nm). It can allow high to increase the imaging in vivo resolution.
ISSN:1053-0509
1573-4994
DOI:10.1007/s10895-020-02521-2