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Journal Articles Physical Chemistry Chemical Physics Year : 2023

Er 3+ Doped Nanoparticles as Upconversion Thermometer Probe in Confined Fluids

Nanoparticules dopées à l'Er 3+ comme sonde thermométrique à conversion ascendante dans des fluides confinés

Abstract

Non-Contact temperature measurement at the nanoscale by photoluminescence using a nano-sensor in a confined fluid has been developed in the present work. Upconversion lanthanide-doped nanoparticles applied to ratiometric thermometry could be considered as a self-referenced nanosensor. Gadolinium orthovanadate (GdVO4) nanoparticles, doped with Yb3+ and Er3+ were synthesized and then dispersed in an ester-based fluid. Rheological measurements show that the viscosity of the dispersed NPs suspension remains unchanged up to the shear rate of 10-4 s-1 at 393 K. The NPs suspension allows luminescence intensity ratio (LIR) thermometry up to 473 K with a relative sensitivity of 1.17%. K-1 with the NIR laser. Then, the temperature calibration by coupling the high pressure (1.08 GPa max) confirmed the applicability of NPs as a thermosensor in a variable pressure environment. According to these results, the fluid containing GdVO4: Yb3+/Er3+ nanoparticles can be used for temperature sensing in a pressurized environment for further application in tribology.
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Dates and versions

hal-04159381 , version 1 (11-07-2023)

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Yujiao Zhou, Gilles Ledoux, Laurence Bois, Sylvie Descartes, N. Bouscharain, et al.. Er 3+ Doped Nanoparticles as Upconversion Thermometer Probe in Confined Fluids. Physical Chemistry Chemical Physics, 2023, 25 (28), pp.19254-19265. ⟨10.1039/D3CP02218H⟩. ⟨hal-04159381⟩
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