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- W2003232671 abstract "We study the fluorescence properties of up-converting α-NaYF<sub>4</sub>:Er<sup>3+</sup>/Yb<sup>3+</sup> nanocrystals (NCs) in the presence of spherical Au nanoparticles. The effects of plasmon excitations in the Au nanoparticles were studied using scanning confocal fluorescence microscope. The results show that the <sup>4</sup>S<sub>3/2</sub>→ <sup>4</sup>I<sub>15/2</sub> transition in erbium ions, which appears at 540 nm, resonant with the plasmon band of the Au nanoparticles, is efficiently quenched. In contrast, in the case of <sup>4</sup>F<sub>9/2</sub>→ <sup>4</sup>I<sub>15/2</sub> transition, which appears at 650 nm, we find the increase of emission intensity. Complementary measurement of fluorescence lifetimes of individual NaYF<sub>4</sub>:Er<sup>3+</sup>/Yb<sup>3+</sup> nanocrystals reveals that plasmonic excitations in Au nanoparticles influence the dynamics of both emission band in erbium ions." @default.
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- W2003232671 date "2014-09-10" @default.
- W2003232671 modified "2023-10-18" @default.
- W2003232671 title "Plasmonic influence on the up-conversion luminescence in NaYF4:Er3+/Yb3+nanocrystals" @default.
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- W2003232671 doi "https://doi.org/10.1117/12.2061331" @default.
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