Fabrication and photoluminescent properties of Tb3+ doped carbon nanodots

Carbon nanodots (CNDs) doped with Tb ions were synthesized using different synthetic routes: hydrothermal treatment of a solution containing carbon source (sodium dextran sulfate) and TbCl 3 ; mixing of CNDs and TbCl 3 solutions; freezing-induced loading of Tb and carbon-containing source into pores...

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Bibliographic Details
Published in:Scientific reports 2018-11, Vol.8 (1), p.1-8, Article 16301
Main Authors: Vostrikova, Anna M., Kokorina, Alina A., Demina, Polina A., German, Sergei V., Novoselova, Marina V., Tarakina, Nadezda V., Sukhorukov, Gleb B., Goryacheva, Irina Y.
Format: Article
Language:English
Subjects:
639/301/357/354
639/638/549/2263
Biological samples
Calcium carbonate
Carbon
Carbon sources
Cations
Dextran
Dextran sulfate
Energy transfer
Fabrication
Freezing
Humanities and Social Sciences
Ions
Luminescence
Microparticles
multidisciplinary
Photons
Pores
Science
Science (multidisciplinary)
Sodium
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Summary:Carbon nanodots (CNDs) doped with Tb ions were synthesized using different synthetic routes: hydrothermal treatment of a solution containing carbon source (sodium dextran sulfate) and TbCl 3 ; mixing of CNDs and TbCl 3 solutions; freezing-induced loading of Tb and carbon-containing source into pores of CaCO 3 microparticles followed by hydrothermal treatment. Binding of Tb ions to CNDs (Tb-CND coupling) was confirmed using size-exclusion chromatography and manifested itself through a decrease of the Tb photoluminescence lifetime signal. The shortest Tb photoluminescence lifetime was observed for samples obtained by hydrothermal synthesis of CaCO 3 microparticles where Tb and carbon source were loaded into pores via the freezing-induced process. The same system displays an increase of Tb photoluminescence via energy transfer with excitation at 320–340 nm. Based on the obtained results, freezing-induced loading of cations into CNDs using porous CaCO 3 microparticles as reactors is proposed to be a versatile route for the introduction of active components into CNDs. The obtained CNDs with long-lived emission may be used for time-resolved imaging and visualization in living biological samples where time-resolved and long-lived luminescence microscopy is required.
ISSN:2045-2322
2045-2322
DOI:10.1038/s41598-018-34683-2