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Enhancement of X-ray-Excited Red Luminescence of Chromium-Doped Zinc Gallate via Ultrasmall Silicon Carbide Nanocrystals

[Image: see text] X-ray-activated near-infrared luminescent nanoparticles are considered as new alternative optical probes due to being free of autofluorescence, while both their excitation and emission possess a high penetration efficacy in vivo. Herein, we report silicon carbide quantum dot sensit...

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Detalles Bibliográficos
Autores principales: Beke, Dávid, Nardi, Marco V., Bortel, Gábor, Timpel, Melanie, Czigány, Zsolt, Pasquali, Luca, Chiappini, Andrea, Bais, Giorgio, Rudolf, Mátyás, Zalka, Dóra, Bigi, Franca, Rossi, Francesca, Bencs, László, Pekker, Aron, Márkus, Bence G., Salviati, Giancarlo, Saddow, Stephen E., Kamarás, Katalin, Simon, Ferenc, Gali, Adam
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Chemical Society 2021
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8042637/
https://www.ncbi.nlm.nih.gov/pubmed/33859456
http://dx.doi.org/10.1021/acs.chemmater.0c04671
Descripción
Sumario:[Image: see text] X-ray-activated near-infrared luminescent nanoparticles are considered as new alternative optical probes due to being free of autofluorescence, while both their excitation and emission possess a high penetration efficacy in vivo. Herein, we report silicon carbide quantum dot sensitization of trivalent chromium-doped zinc gallate nanoparticles with enhanced near-infrared emission upon X-ray and UV–vis light excitation. We have found that a ZnGa(2)O(4) shell is formed around the SiC nanoparticles during seeded hydrothermal growth, and SiC increases the emission efficiency up to 1 order of magnitude due to band alignment that channels the excited electrons to the chromium ion.