Enhancing optical functionality by co-loading NaYF4:Yb,Er and CdSe QDs in a single core-shell nanocapsule

Colloidal, oil-core polymer-shell nanocapsules (NCs), loaded with both upconversion NaYF4:Yb,Er nanoparticles (NPs) and CdSe quantum dots (QDs), were prepared via nanoemulsification/solvent-evaporation methods. Transmission electron microscopy (TEM), energy-dispersive X-ray spectroscopy (EDX) and X-...

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Bibliographic Details
Published in:Journal of materials chemistry. C, Materials for optical and electronic devices Materials for optical and electronic devices, 2020-11, Vol.8 (42), p.14796-14804
Main Authors: Antoniak, Magda A, Bazylińska, Urszula, Wawrzyńczyk, Dominika, Ćwierzona, Maciej, Maćkowski, Sebastian, Piątkowski, Dawid, Kulbacka, Julita, Nyk, Marcin
Format: Article
Language:English
Subjects:
Absorption cross sections
Cadmium selenides
Chemical compounds
Dispersion
Energy dispersive X ray spectroscopy
Erbium
Fluorescence
Fluorides
Luminescence
Medical imaging
Morphology
Nanoparticles
Optical properties
Phase composition
Photoluminescence
Photon absorption
Photons
Quantum dots
Sodium compounds
Spectrum analysis
Toxicity
Transmission electron microscopy
Upconversion
X-ray diffraction
Ytterbium
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Summary:Colloidal, oil-core polymer-shell nanocapsules (NCs), loaded with both upconversion NaYF4:Yb,Er nanoparticles (NPs) and CdSe quantum dots (QDs), were prepared via nanoemulsification/solvent-evaporation methods. Transmission electron microscopy (TEM), energy-dispersive X-ray spectroscopy (EDX) and X-ray diffraction (XRD) techniques were used to comprehensively determine the structure, phase composition, and morphology of the NCs. Furthermore, we demonstrated that by simultaneously loading the hybrid fluorophores into the multimodal NCs, it is possible to combine their mechanistically distinct one- and two-photon luminescence properties. The two-photon absorption cross-section obtained at 850 nm for a single capsule was equal to 2.5 × 104 GM (Goeppert-Mayer units). Importantly, cytotoxicity studies indicated the potential of the co-encapsulated NPs and QDs for fluorescence imaging in biological specimens. We conclude that such non-toxic water-dispersible multifunctional nanohybrids represent a promising platform for advanced one- and two-photon induced fluorescence bioimaging and photonic sensing technologies.
ISSN:2050-7526
2050-7534
DOI:10.1039/d0tc03538f