2024-03-29T00:58:19Zhttp://uvadoc.uva.es/oai/requestoai:uvadoc.uva.es:10324/351562021-06-23T10:18:24Zcom_10324_1158com_10324_931com_10324_894col_10324_1242
New strategies invonving upconverting nanoparticles for determining moderate temperatures by luminescence thermometry
Savchuk, Oleksandr A.
Carvajal, Joan Josep
Pujol, María Cinta
Massons, Jaume
Haro González, Patricia
Martínez Sacristán, Óscar
Jiménez López, Juan Ignacio
Aguiló, Magdalena
Díaz, Francesc
Nanotermometría luminiscente
Luminescent nanothermometry
Iones lantánidos
Lanthanide ions
Producción Científica
Here we analyze alternative luminescence thermometry techniques to FIR, such as intensity ratio luminescence thermometry between the emission arising from two electronic levels that are not necessarily thermally coupled, but that show different evolutions with temperature, and lifetime luminescence nanothermometry in (Ho,Tm,Yb):KLu(WO4)2 and (Er,Yb):NaY2F5O nanoparticles. (Ho,Tm,Yb):KLu(WO4)2 nanoparticles exhibited a maximum relative sensitivity of 0.61% K−1, similar to that achievable in Er-doped systems, which are the upconverting systems presenting the highest sensitivity. From another side, (Er,Yb):NaY2F5O nanocrystals show great potentiality as thermal sensors at the nanoscale for moderate temperatures due to the incorporation of additional non-radiative relaxation mechanisms that shorten the emission lifetime generated by the oxygen present in the structure when compared to (Er,Yb):NaYF4 nanoparticles exhibiting the highest upconversion efficiency. We used those nanoparticles for ex-vivo temperature determination by laser induced heating in chicken breast using lifetime-based thermometry. The results obtained indicate that these techniques might constitute alternatives to FIR with potential applications for the determination of moderate temperatures, with sensitivities comparable to those that can be achieved by FIR or even higher.
Ministerio de Economía, Industria y Competitividad (Projects MAT2013-47395-C4-1-4-R, and TEC2014-55948-R)
Catalan Government (Projects no. 2014SGR1358 and 2013FI_B 01032)
2019-03-20T12:30:23Z
2019-03-20T12:30:23Z
2016
info:eu-repo/semantics/article
https://doi.org/10.1016/j.jlumin.2015.05.016
Journal of Luminescence, 2016, Volume 169, Part B, Pages 711-716
0022-2313
http://uvadoc.uva.es/handle/10324/35156
eng
https://www.sciencedirect.com/science/article/pii/S002223131500263X
Attribution-NonCommercial-NoDerivatives 4.0 International
info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by-nc-nd/4.0/
application/pdf
Elsevier