Lighting up Eu3+ luminescence through remote sensitization in silica nanoarchitectures
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2018
Authors
Artizzu, FlaviaLoche, Danilo
Mara, Dimitrije
Malfatti, Luca
Serpe, Angela
Van Deun, Rik
Casula, Maria Francesca
Article (Published version)
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Hybrid organic-inorganic luminescent lanthanide-based nanomaterials are currently attracting great interest for a variety of applications from bioimaging/sensing to optics and photonics. Herein, we present a concept model system based on purely silica-based core-shell nanoparticles (NPs), where luminescent Eu3+ ions are confined to a thin silica layer and are efficiently remotely photosensitized through an antenna unit covalently grafted on the surface of the outer shell. The obtained core-shell NPs, synthesized through mild sol-gel methods, are of rare quality in terms of size distribution, homogeneity and smoothness of the coating shell, the absence of core-free silica, and dispersion of the dopant phase. Convenient indirect optical pumping through the remote photosensitizer allows a remarkable intensity enhancement of the Eu3+-based NP luminescence by 190-fold with respect to that achievable upon direct metal excitation, yielding the highest intrinsic (phi(Eu) = 49%) and overall (ph...i = 19%) quantum yields and ligand-to-metal sensitization efficiency ((sens) approximate to 40%) reported so far for Eu3+-based remotely sensitized organic-inorganic nanosystems. These performances are achieved thanks to the suppression of unexpected nonradiative decay channels pertaining to the silica matrix as revealed by an in-depth analysis of the temporal dynamics of Eu3+ emission upon direct and indirect excitation. These results show that silica matrices are a suitable highly performing host alternative to commonly investigated nanocrystals such as fluorides for the development of lanthanide-based luminescent materials with the additional potentiality of high processing versatility through well-established sol-gel chemistry methods.
Source:
Journal of Materials Chemistry C, 2018, 6, 28, 7479-7486Funding / projects:
- FWO
- European Union's Horizon 2020 research and the innovation programme under the Marie Sklodowska-Curie grant [665501]
- Research Foundation Flanders (FWO)
- European Union [12U3417N LV]
- Istituto Superiore delle Comunicazioni e delle Tecnologie dell'Informazione (ISCTI), Italian Ministry of Economic Development
DOI: 10.1039/c8tc02097c
ISSN: 2050-7526
WoS: 000439316300004
Scopus: 2-s2.0-85050408741
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Institut za opštu i fizičku hemijuTY - JOUR AU - Artizzu, Flavia AU - Loche, Danilo AU - Mara, Dimitrije AU - Malfatti, Luca AU - Serpe, Angela AU - Van Deun, Rik AU - Casula, Maria Francesca PY - 2018 UR - https://riofh.iofh.bg.ac.rs/handle/123456789/619 AB - Hybrid organic-inorganic luminescent lanthanide-based nanomaterials are currently attracting great interest for a variety of applications from bioimaging/sensing to optics and photonics. Herein, we present a concept model system based on purely silica-based core-shell nanoparticles (NPs), where luminescent Eu3+ ions are confined to a thin silica layer and are efficiently remotely photosensitized through an antenna unit covalently grafted on the surface of the outer shell. The obtained core-shell NPs, synthesized through mild sol-gel methods, are of rare quality in terms of size distribution, homogeneity and smoothness of the coating shell, the absence of core-free silica, and dispersion of the dopant phase. Convenient indirect optical pumping through the remote photosensitizer allows a remarkable intensity enhancement of the Eu3+-based NP luminescence by 190-fold with respect to that achievable upon direct metal excitation, yielding the highest intrinsic (phi(Eu) = 49%) and overall (phi = 19%) quantum yields and ligand-to-metal sensitization efficiency ((sens) approximate to 40%) reported so far for Eu3+-based remotely sensitized organic-inorganic nanosystems. These performances are achieved thanks to the suppression of unexpected nonradiative decay channels pertaining to the silica matrix as revealed by an in-depth analysis of the temporal dynamics of Eu3+ emission upon direct and indirect excitation. These results show that silica matrices are a suitable highly performing host alternative to commonly investigated nanocrystals such as fluorides for the development of lanthanide-based luminescent materials with the additional potentiality of high processing versatility through well-established sol-gel chemistry methods. T2 - Journal of Materials Chemistry C T1 - Lighting up Eu3+ luminescence through remote sensitization in silica nanoarchitectures EP - 7486 IS - 28 SP - 7479 VL - 6 DO - 10.1039/c8tc02097c UR - conv_734 ER -
@article{ author = "Artizzu, Flavia and Loche, Danilo and Mara, Dimitrije and Malfatti, Luca and Serpe, Angela and Van Deun, Rik and Casula, Maria Francesca", year = "2018", abstract = "Hybrid organic-inorganic luminescent lanthanide-based nanomaterials are currently attracting great interest for a variety of applications from bioimaging/sensing to optics and photonics. Herein, we present a concept model system based on purely silica-based core-shell nanoparticles (NPs), where luminescent Eu3+ ions are confined to a thin silica layer and are efficiently remotely photosensitized through an antenna unit covalently grafted on the surface of the outer shell. The obtained core-shell NPs, synthesized through mild sol-gel methods, are of rare quality in terms of size distribution, homogeneity and smoothness of the coating shell, the absence of core-free silica, and dispersion of the dopant phase. Convenient indirect optical pumping through the remote photosensitizer allows a remarkable intensity enhancement of the Eu3+-based NP luminescence by 190-fold with respect to that achievable upon direct metal excitation, yielding the highest intrinsic (phi(Eu) = 49%) and overall (phi = 19%) quantum yields and ligand-to-metal sensitization efficiency ((sens) approximate to 40%) reported so far for Eu3+-based remotely sensitized organic-inorganic nanosystems. These performances are achieved thanks to the suppression of unexpected nonradiative decay channels pertaining to the silica matrix as revealed by an in-depth analysis of the temporal dynamics of Eu3+ emission upon direct and indirect excitation. These results show that silica matrices are a suitable highly performing host alternative to commonly investigated nanocrystals such as fluorides for the development of lanthanide-based luminescent materials with the additional potentiality of high processing versatility through well-established sol-gel chemistry methods.", journal = "Journal of Materials Chemistry C", title = "Lighting up Eu3+ luminescence through remote sensitization in silica nanoarchitectures", pages = "7486-7479", number = "28", volume = "6", doi = "10.1039/c8tc02097c", url = "conv_734" }
Artizzu, F., Loche, D., Mara, D., Malfatti, L., Serpe, A., Van Deun, R.,& Casula, M. F.. (2018). Lighting up Eu3+ luminescence through remote sensitization in silica nanoarchitectures. in Journal of Materials Chemistry C, 6(28), 7479-7486. https://doi.org/10.1039/c8tc02097c conv_734
Artizzu F, Loche D, Mara D, Malfatti L, Serpe A, Van Deun R, Casula MF. Lighting up Eu3+ luminescence through remote sensitization in silica nanoarchitectures. in Journal of Materials Chemistry C. 2018;6(28):7479-7486. doi:10.1039/c8tc02097c conv_734 .
Artizzu, Flavia, Loche, Danilo, Mara, Dimitrije, Malfatti, Luca, Serpe, Angela, Van Deun, Rik, Casula, Maria Francesca, "Lighting up Eu3+ luminescence through remote sensitization in silica nanoarchitectures" in Journal of Materials Chemistry C, 6, no. 28 (2018):7479-7486, https://doi.org/10.1039/c8tc02097c ., conv_734 .