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http://hdl.handle.net/10773/31393
Title: | Inert shell effect on the quantum yield of neodymium-doped near-Infrared nanoparticles: the necessary shield in an aqueous dispersion |
Author: | Skripka, Artiom Benayas, Antonio Brites, Carlos D. S. Martín, Inocencio R. Carlos, Luís D. Vetrone, Fiorenzo |
Keywords: | Near-infrared Downshifting Quantum yield Lanthanide-doped nanoparticles Neodymium |
Issue Date: | 14-Oct-2020 |
Publisher: | American Chemical Society |
Abstract: | Lanthanide-doped nanoparticles (LnNPs) are versatile near-infrared (NIR) emitting nanoprobes that have led to their growing interest for use in biomedicine-related imaging. Toward the brightest LnNPs, high photoluminescence quantum yield (PLQY) values are attained by implementing core/shell engineering, particularly with an optically inert shell. In this work, a thorough investigation is performed to quantify how an outer inert shell maintains the PLQY of Nd3+-doped LnNPs dispersed in an aqueous environment. Three relevant quantitative findings affecting the PLQY of Nd3+-doped LnNPs are identified: (i) the PLQY of core LnNPs is improved 3-fold upon inert shell coating; (ii) PLQY decreases with increasing Nd3+ doping despite the inert shell; and (iii) solvent quenching has a major influence on the PLQY of the LnNPs, though it is relatively lessened for high Nd3+ doping. Overall, we shed new light on the impact of the LnNP architecture on the NIR emission, as well as on the quenching effects caused by doping concentration and solvent molecules. |
Peer review: | yes |
URI: | http://hdl.handle.net/10773/31393 |
DOI: | 10.1021/acs.nanolett.0c03187 |
ISSN: | 1530-6984 |
Appears in Collections: | CICECO - Artigos DFis - Artigos |
Files in This Item:
File | Description | Size | Format | |
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acs.nanolett.0c03187.pdf | 1.83 MB | Adobe PDF |
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