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Please use this identifier to cite or link to this item: http://uvadoc.uva.es/handle/10324/35156
Title: New strategies invonving upconverting nanoparticles for determining moderate temperatures by luminescence thermometry
Authors: Savchuk, Ol.A.
Carvajal, J.J.
Pujol, M.C.
Massons, J.
Haro González, P.
Martínez Sacristán, Óscar
Jiménez López, Juan Ignacio
Aguiló, Magdalena
Díaz, F.
Issue Date: 2016
Publisher: Elsevier
Description: Producción Científica
Citation: Journal of Luminescence, 2016, Volume 169, Part B, Pages 711-716
Abstract: 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.
Classification: Nanotermometría luminiscente
Luminescent nanothermometry
Iones lantánidos
Lanthanide ions
ISSN: 0022-2313
Peer Review: SI
DOI: https://doi.org/10.1016/j.jlumin.2015.05.016
Sponsor: 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)
Publisher Version: https://www.sciencedirect.com/science/article/pii/S002223131500263X
Language: eng
URI: http://uvadoc.uva.es/handle/10324/35156
Rights: info:eu-repo/semantics/openAccess
Appears in Collections:DEP32 - Artículos de revista

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