Less is more: dimensionality reduction as a general strategy for more precise luminescence thermometry
EntityUAM. Departamento de Física de Materiales
10.1038/s41377-022-00932-3Light: Science and Applications 11.1 (2022): 237
ProjectGobierno de España. PID2019-106211RB-I00; Gobierno de España. MAT2017-83111R; Comunidad de Madrid. B2017/BMD-3867/RENIM-CM; info:eu-repo/grantAgreement/EC/H2020/801305/EU//NanoTBTech
SubjectsCalibration; Linear Transformations; Rare Earths; Stochastic Systems; Thermometers; Física
Rights© The Author(s) 2022
Esta obra está bajo una Licencia Creative Commons Atribución 4.0 Internacional.
Thermal resolution (also referred to as temperature uncertainty) establishes the minimum discernible temperature change sensed by luminescent thermometers and is a key figure of merit to rank them. Much has been done to minimize its value via probe optimization and correction of readout artifacts, but little effort was put into a better exploitation of calibration datasets. In this context, this work aims at providing a new perspective on the definition of luminescence-based thermometric parameters using dimensionality reduction techniques that emerged in the last years. The application of linear (Principal Component Analysis) and non-linear (t-distributed Stochastic Neighbor Embedding) transformations to the calibration datasets obtained from rare-earth nanoparticles and semiconductor nanocrystals resulted in an improvement in thermal resolution compared to the more classical intensity-based and ratiometric approaches. This, in turn, enabled precise monitoring of temperature changes smaller than 0.1 °C. The methods here presented allow choosing superior thermometric parameters compared to the more classical ones, pushing the performance of luminescent thermometers close to the experimentally achievable limits
Google Scholar:Ximendes, Erving Clayton - Marin, Riccardo - Carlos, Luis Dias - Jaque García, Daniel
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