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NaGdF4:Yb, Er, Tm Upconversion Nanoparticles for Bioimaging in Shortwave-Infrared Range: Study of Energy Transfer Processes and Composition Optimization

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dc.contributor.authorPominova, D.
dc.contributor.authorProydakova, V.
dc.contributor.authorRomanishkin, I.
dc.contributor.authorRyabova, A.
dc.contributor.authorПоминова, Дарья Вячеславовна
dc.contributor.authorРябова, Анастасия Владимировна
dc.date.accessioned2024-12-04T08:39:08Z
dc.date.available2024-12-04T08:39:08Z
dc.date.issued2024
dc.description.abstractUpconversion nanoparticles are promising for many applications. For triple-doped nanoparticles (NPs), the luminescence intensity shows a non-linear dependence on the rare-earth ion concentration, making it difficult to obtain bright phosphors with high energy output. We investigated the energy transfer processes in β-NaGdF4:Yb-Er-Tm NPs and considered strategies for increasing the thulium luminescence intensity, in particular, the use of core–shell structures. The luminescence spectra were analyzed in the short-wavelength infrared (SWIR) and visible (VIS) regions. The Er3+ and Tm3+ luminescence lifetimes in the VIS region were measured to study the energy transfer processes between the active ions. The quenching of the Tm3+ luminescence in the SWIR region was observed. However, both Er3+ and Tm3+ luminescence bands were observed in the VIS range. We attribute these effects to energy transfer between Tm3+ 3F4 → 3H6 and Er3+ 4I13/2 → 4I9/2, which occurs due to overlap of Er3+ and Tm3+ luminescence bands, and also to competition between Er3+ and Tm3+ for energy transfer from Yb3+. For core–shell NPs, when Tm3+ and Er3+ are separated into adjacent layers, quenching cannot be avoided, likely due to the mutual diffusion of ions during shell synthesis. The most optimal strategy to obtain luminescence in the SWIR range is to use an inert intermediate shell between the layers containing Tm3+ and Er3+.
dc.identifier.citationNaGdF4:Yb, Er, Tm Upconversion Nanoparticles for Bioimaging in Shortwave-Infrared Range: Study of Energy Transfer Processes and Composition Optimization / Pominova, D. [et al.] // Photonics. - 2024. - 11. - № 1. - 10.3390/photonics11010038
dc.identifier.doi10.3390/photonics11010038
dc.identifier.urihttps://www.doi.org/10.3390/photonics11010038
dc.identifier.urihttps://www.scopus.com/record/display.uri?eid=2-s2.0-85183613579&origin=resultslist
dc.identifier.urihttps://openrepository.mephi.ru/handle/123456789/25788
dc.relation.ispartofPhotonics
dc.subjectUpconversion Nanoparticles
dc.subjectPhoton Upconversion
dc.subjectNanocrystal Synthesis
dc.subjectLuminescent Materials
dc.subjectNeutron Detection
dc.titleNaGdF4:Yb, Er, Tm Upconversion Nanoparticles for Bioimaging in Shortwave-Infrared Range: Study of Energy Transfer Processes and Composition Optimization
dc.typeArticle
dspace.entity.typePublication
oaire.citation.issue1
oaire.citation.volume11
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relation.isAuthorOfPublicationb912726a-4a4b-49d1-ae54-d43f8c6a24fa
relation.isAuthorOfPublication.latestForDiscoveryadf1a681-56b1-404a-860a-77bec26e6694
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