10.5281/zenodo.4891836
https://zenodo.org/records/4891836
oai:zenodo.org:4891836
Kaczmarek, Anna M.
Anna M.
Kaczmarek
0000-0001-5254-8762
NanoSensing Group, Department of Chemistry, Ghent University, Krijgslaan 281-S3, 9000 Ghent, Belgium
Suta, Markus
Markus
Suta
0000-0001-8024-6665
Condensed Matter and Interfaces, Debye Institute for Nanomaterials Science, Department of Chemistry, Utrecht University, Princetonplein 1, 3584 CC Utrecht, Netherlands
Rijckaert, Hannes
Hannes
Rijckaert
0000-0002-6078-2919
SCRIPTs, Department of Chemistry, Ghent University, Krijgslaan 281-S3, 9000 Ghent, Belgium.
van Swieten, Thomas P.
Thomas P.
van Swieten
0000-0002-1080-2045
Condensed Matter and Interfaces, Debye Institute for Nanomaterials Science, Department of Chemistry, Utrecht University, Princetonplein 1, 3584 CC Utrecht, Netherlands
Van Driessche, Isabel
Isabel
Van Driessche
0000-0001-5253-3325
SCRIPTs, Department of Chemistry, Ghent University, Krijgslaan 281-S3, 9000 Ghent, Belgium.
Kaczmarek, Mariusz K.
Mariusz K.
Kaczmarek
0000-0002-8253-2435
Department of Mechatronics, Kazimierz Wielki University in Bydgoszcz, Kopernika 1, 85-074 Bydgoszcz, Poland
Meijerink, Andries
Andries
Meijerink
0000-0003-3573-9289
Condensed Matter and Interfaces, Debye Institute for Nanomaterials Science, Department of Chemistry, Utrecht University, Princetonplein 1, 3584 CC Utrecht, Netherlands
High temperature (nano)thermometers based on LiLuF4:Er3+, Yb3+ nano- and microcrystals. Confounded results for core-shell nanocrystals
Zenodo
2021
2021-02-15
10.1039/D0TC05865C
10.5281/zenodo.4891835
https://zenodo.org/communities/eu
Creative Commons Attribution 4.0 International
Recent technological developments require knowledge of temperature down to the micro- or even nanoscale. Lanthanide-doped nanoparticles became a popular tool to achieve this. Their temperature sensitive luminescence enables their application as remote thermometer and for mapping temperature profiles with high spatial resolution. Applicability of luminescence thermometry is, however, often limited at high temperatures. In nanoelectronics or chemical reactors, high temperatures above 500 K are common and new approaches for accurate high temperature sensing need to be developed. In this work, we report three different shapes of upconverting LiLuF4: 2% Er3+, 18% Yb3+ nanocrystals both with and without shells and study the influence of the shell on the thermometric properties. We observed peculiar behavior of the core-shell particles suggesting the presence of the dopants within the protective and ‘undoped’ shells. Coating the nanoparticles with a silica layer extends the operational temperature range. In an upconversion (UC) Yb3+-Er3+ system temperature sensing relies on thermal coupling between the 4S3/2 and 2H11/2 energy levels. At sufficiently high temperatures (> 550 K), we observe additional thermal coupling involving the higher 4F7/2 energy levels. The larger energy gap allows to increase the relative sensitivity at elevated temperatures and to sustain a high temperature precision over a wider temperature range than for a two-level Boltzmann thermometer. The thermal coupling between the 4S3/2 and 2H11/2 energy levels is used for lower temperature sensing (< 550 K) and the 4F7/2 energy level is crucial for higher temperature sensing (> 550 K).
This project has received funding from the European Union's Horizon 2020 FET Open programme under grant agreement No 801305 (NanoTBTech).
European Commission
10.13039/501100000780
801305
Nanoparticles-based 2D thermal bioimaging technologies