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Lighting up Eu3+ luminescence through remote sensitization in silica nanoarchitectures

(2018) JOURNAL OF MATERIALS CHEMISTRY C. 6(28). p.7479-7486
Author
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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.
Keywords
UP-CONVERSION NANOPARTICLES, NEAR-INFRARED LIGHT, QUANTUM DOTS, EMISSION, SPHERES, NANOCRYSTALS, LIGANDS, RANGE

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MLA
Artizzu, Flavia, Danilo Loche, Dimitrije Mara, et al. “Lighting up Eu3+ Luminescence Through Remote Sensitization in Silica Nanoarchitectures.” JOURNAL OF MATERIALS CHEMISTRY C 6.28 (2018): 7479–7486. Print.
APA
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. JOURNAL OF MATERIALS CHEMISTRY C, 6(28), 7479–7486.
Chicago author-date
Artizzu, Flavia, Danilo Loche, Dimitrije Mara, Luca Malfatti, Angela Serpe, Rik Van Deun, and Maria Francesca Casula. 2018. “Lighting up Eu3+ Luminescence Through Remote Sensitization in Silica Nanoarchitectures.” Journal of Materials Chemistry C 6 (28): 7479–7486.
Chicago author-date (all authors)
Artizzu, Flavia, Danilo Loche, Dimitrije Mara, Luca Malfatti, Angela Serpe, Rik Van Deun, and Maria Francesca Casula. 2018. “Lighting up Eu3+ Luminescence Through Remote Sensitization in Silica Nanoarchitectures.” Journal of Materials Chemistry C 6 (28): 7479–7486.
Vancouver
1.
Artizzu F, Loche D, Mara D, Malfatti L, Serpe A, Van Deun R, et al. Lighting up Eu3+ luminescence through remote sensitization in silica nanoarchitectures. JOURNAL OF MATERIALS CHEMISTRY C. 2018;6(28):7479–86.
IEEE
[1]
F. Artizzu et al., “Lighting up Eu3+ luminescence through remote sensitization in silica nanoarchitectures,” JOURNAL OF MATERIALS CHEMISTRY C, vol. 6, no. 28, pp. 7479–7486, 2018.
@article{8577389,
  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.},
  author       = {Artizzu, Flavia and Loche, Danilo and Mara, Dimitrije and Malfatti, Luca and Serpe, Angela and Van Deun, Rik and Casula, Maria Francesca},
  issn         = {2050-7526},
  journal      = {JOURNAL OF MATERIALS CHEMISTRY C},
  keywords     = {UP-CONVERSION NANOPARTICLES,NEAR-INFRARED LIGHT,QUANTUM DOTS,EMISSION,SPHERES,NANOCRYSTALS,LIGANDS,RANGE},
  language     = {eng},
  number       = {28},
  pages        = {7479--7486},
  title        = {Lighting up Eu3+ luminescence through remote sensitization in silica nanoarchitectures},
  url          = {http://dx.doi.org/10.1039/c8tc02097c},
  volume       = {6},
  year         = {2018},
}

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