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Issue 5, 2018
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Tuning the sensitivity of lanthanide-activated NIR nanothermometers in the biological windows

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Abstract

Lanthanide-activated SrF2 nanoparticles with a multishell architecture were investigated as optical thermometers in the biological windows. A ratiometric approach based on the relative changes in the intensities of different lanthanide (Nd3+ and Yb3+) NIR emissions was applied to investigate the thermometric properties of the nanoparticles. It was found that an appropriate doping with Er3+ ions can increase the thermometric properties of the Nd3+–Yb3+ coupled systems. In addition, a core containing Yb3+ and Tm3+ can generate light in the visible and UV regions upon near-infrared (NIR) laser excitation at 980 nm. The multishell structure combined with the rational choice of dopants proves to be particularly important to control and enhance the performance of nanoparticles as NIR nanothermometers.

Graphical abstract: Tuning the sensitivity of lanthanide-activated NIR nanothermometers in the biological windows

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Supplementary files

Article information


Submitted
06 Sep 2017
Accepted
28 Dec 2017
First published
29 Dec 2017

Nanoscale, 2018,10, 2568-2576
Article type
Paper

Tuning the sensitivity of lanthanide-activated NIR nanothermometers in the biological windows

P. Cortelletti, A. Skripka, C. Facciotti, M. Pedroni, G. Caputo, N. Pinna, M. Quintanilla, A. Benayas, F. Vetrone and A. Speghini, Nanoscale, 2018, 10, 2568
DOI: 10.1039/C7NR06141B

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