Issue 28, 2023

Er3+ doped nanoparticles as upconversion thermometer probes in confined fluids

Abstract

Non-contact temperature measurement at the nanoscale by photoluminescence using a nano-sensor in a confined fluid has been performed 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 NP suspension remains unchanged up to a shear rate of 10−4 s−1 at 393 K. The NP suspension allows luminescence intensity ratio (LIR) thermometry up to 473 K with a relative sensitivity of 1.17% K−1 with a 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.

Graphical abstract: Er3+ doped nanoparticles as upconversion thermometer probes in confined fluids

Supplementary files

Article information

Article type
Paper
Submitted
15 May 2023
Accepted
15 Jun 2023
First published
04 Jul 2023
This article is Open Access
Creative Commons BY-NC license

Phys. Chem. Chem. Phys., 2023,25, 19254-19265

Er3+ doped nanoparticles as upconversion thermometer probes in confined fluids

Y. Zhou, G. Ledoux, L. Bois, S. Descartes, N. Bouscharain, F. Chassagneux, M. Martini, Y. M. Bakary, C. Journet and D. Philippon, Phys. Chem. Chem. Phys., 2023, 25, 19254 DOI: 10.1039/D3CP02218H

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