Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 734, Issue -, Pages 136-143Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2017.11.048
Keywords
Lanthanides; Nanothermometry; Core-shell; Thermal sensitivity; Biological windows
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Funding
- Russian Science Foundation [17-72-10055]
- Russian Science Foundation [17-72-10055] Funding Source: Russian Science Foundation
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Structural and luminescence properties of uncovered YVO4:Nd3+ and core-shell YVO4:Nd3+@SiO2 nanoparticles synthesized via modified Pechini technique were studied. Effect of silica shell thickness on steady state and kinetics luminescence parameters was investigated. Synthesized nanoparticles were used as non-contact optical thermometers operating in the second biological window upon heating-free 808 nm light by monitoring fluorescence intensity ratio between Nd3+ emission bands as a temperature-dependent parameter. Benefits of silica coating on the temperature sensing properties were clearly demonstrated. The best thermal sensitivity was found to be 0.40% K-1 at 299 K, the minimum temperature uncertainty was less than 0.5 K, which is enough for accurate temperature evaluation in the real systems. (C) 2017 Elsevier B.V. All rights reserved.
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