Highly efficient green up-conversion emission from fluoroindate glass nanoparticles functionalized with a biocompatible polymer

Up-conversion nanoparticles have garnered lots of attention due to their ability to transform low energy light (near-infrared) into high-energy (visible) light, enabling their potential use as remote visible light nano-transducers. However, their low efficiency restricts their full potential. To ove...

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Bibliographic Details
Published in:RSC advances 2022-07, Vol.12 (31), p.274-279
Main Authors: Jimenez, G. Lesly, Shrestha, Binita, Porter, Tyron, Starzyk, Bartlomiej, Lesniak, Magdalena, Kuwik, Marta, Kochanowicz, Marcin, Szumera, Magdalena, Lisiecki, R, Dorosz, D
Format: Article
Language:English
Subjects:
Biocompatibility
Biomedical materials
Chemistry
Energy transfer
Erbium
Metal ions
Nanoparticles
Polyethylene glycol
Rare earth elements
Thermal stability
Transducers
Upconversion
Ytterbium
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Summary:Up-conversion nanoparticles have garnered lots of attention due to their ability to transform low energy light (near-infrared) into high-energy (visible) light, enabling their potential use as remote visible light nano-transducers. However, their low efficiency restricts their full potential. To overcome this disadvantage, fluoroindate glasses (InF 3 ) doped at different molar concentrations of Yb 3+ and Er 3+ were obtained using the melting-quenching technique, reaching the highest green emission at 1.4Yb and 1.75Er (mol%), which corresponds to the 4 S 3/2 → 4 I 15/2 (540-552 nm) transition. The particles possess the amorphous nature of the glass and have a high thermostability, as corroborated by thermogravimetric assay. Furthermore, the spectral decay curve analysis showed efficient energy transfer as the rare-earth ions varied. This was corroborated with the absolute quantum yield (QY) obtained (85%) upon excitation at 385 nm with QYEr = 17% and QYYb = 68%. Additionally, InF 3 -1.4Yb-1.75Er was milled and functionalized using poly(ethylene glycol) to impart biocompatibility, which is essential for biomedical applications. Such functionalization was verified using FTIR, TG/DSC, and XRD. Up-conversion nanoparticles have garnered lots of attention due to their ability to transform low energy light (near-infrared) into high-energy (visible) light, enabling their potential use as remote visible light nano-transducers.
ISSN:2046-2069
2046-2069
DOI:10.1039/d2ra03171j