TY  - JOUR
AU  - Ćirić, Aleksandar
AU  - van Swieten, Thomas
AU  - Periša, Jovana
AU  - Meijerink, Andries
AU  - Dramićanin, Miroslav
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/11066
AB  - Luminescence thermometry is the most versatile remote temperature sensing technique and can be employed from living cells to large surfaces and from cryogenic temperatures to the melting points of metals. Ongoing research aims to optimize the sensitivity of the ratio between the emission intensity from two coupled excited states. However, this approach is inherently limited to temperature-dependent processes involving only the excited states. Here, we develop a novel measurement technique, called luminescence intensity ratio squared (LIR2) for the Yb3+/Er3+ pair, that combines the temperature sensitivity of ground- and excited-state populations. We use Y3Al5O12:Er3+,Yb3+ nanoparticles as a promising model system with both visible and infrared emissions. To apply our method, we record two luminescence spectra at different excitation wavelengths and determine the LIR2 using one emission in each of the two spectra. The LIR2 testing with Y3Al5O12 nanoparticles showed a sensitivity increase of 70% in the visible region and an impressive 230% increase in the NIR region compared to the conventional LIR method. This enhances the measurement precision by a factor of 1.5–2.5. The LIR2 based on the visible upconversion emission is particularly useful for measurements of high temperatures, while the LIR2 based on the downshifted ∼1.5 μm emission may revolutionize temperature measurements of biological samples in the range of physiological temperatures.
T2  - Journal of Applied Physics
T1  - Twofold increase in the sensitivity of Er3+/Yb3+ Boltzmann thermometer
VL  - 133
IS  - 19
SP  - 194501
DO  - 10.1063/5.0149757
ER  - 

@article{
author = "Ćirić, Aleksandar and van Swieten, Thomas and Periša, Jovana and Meijerink, Andries and Dramićanin, Miroslav",
year = "2023",
abstract = "Luminescence thermometry is the most versatile remote temperature sensing technique and can be employed from living cells to large surfaces and from cryogenic temperatures to the melting points of metals. Ongoing research aims to optimize the sensitivity of the ratio between the emission intensity from two coupled excited states. However, this approach is inherently limited to temperature-dependent processes involving only the excited states. Here, we develop a novel measurement technique, called luminescence intensity ratio squared (LIR2) for the Yb3+/Er3+ pair, that combines the temperature sensitivity of ground- and excited-state populations. We use Y3Al5O12:Er3+,Yb3+ nanoparticles as a promising model system with both visible and infrared emissions. To apply our method, we record two luminescence spectra at different excitation wavelengths and determine the LIR2 using one emission in each of the two spectra. The LIR2 testing with Y3Al5O12 nanoparticles showed a sensitivity increase of 70% in the visible region and an impressive 230% increase in the NIR region compared to the conventional LIR method. This enhances the measurement precision by a factor of 1.5–2.5. The LIR2 based on the visible upconversion emission is particularly useful for measurements of high temperatures, while the LIR2 based on the downshifted ∼1.5 μm emission may revolutionize temperature measurements of biological samples in the range of physiological temperatures.",
journal = "Journal of Applied Physics",
title = "Twofold increase in the sensitivity of Er3+/Yb3+ Boltzmann thermometer",
volume = "133",
number = "19",
pages = "194501",
doi = "10.1063/5.0149757"
}

Ćirić, A., van Swieten, T., Periša, J., Meijerink, A.,& Dramićanin, M.. (2023). Twofold increase in the sensitivity of Er3+/Yb3+ Boltzmann thermometer. in Journal of Applied Physics, 133(19), 194501.
https://doi.org/10.1063/5.0149757

Ćirić A, van Swieten T, Periša J, Meijerink A, Dramićanin M. Twofold increase in the sensitivity of Er3+/Yb3+ Boltzmann thermometer. in Journal of Applied Physics. 2023;133(19):194501.
doi:10.1063/5.0149757 .

Ćirić, Aleksandar, van Swieten, Thomas, Periša, Jovana, Meijerink, Andries, Dramićanin, Miroslav, "Twofold increase in the sensitivity of Er3+/Yb3+ Boltzmann thermometer" in Journal of Applied Physics, 133, no. 19 (2023):194501,
https://doi.org/10.1063/5.0149757 . .