RT info:eu-repo/semantics/article
T1 New strategies invonving upconverting nanoparticles for determining moderate temperatures by luminescence thermometry
A1 Savchuk, Oleksandr A.
A1 Carvajal, Joan Josep
A1 Pujol, María Cinta
A1 Massons, Jaume
A1 Haro González, Patricia
A1 Martínez Sacristán, Óscar
A1 Jiménez López, Juan Ignacio
A1 Aguiló, Magdalena
A1 Díaz, Francesc
K1 Nanotermometría luminiscente
K1 Luminescent nanothermometry
K1 Iones lantánidos
K1 Lanthanide ions
AB 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.
PB Elsevier
SN 0022-2313
YR 2016
FD 2016
LK http://uvadoc.uva.es/handle/10324/35156
UL http://uvadoc.uva.es/handle/10324/35156
LA eng
NO Journal of Luminescence, 2016, Volume 169, Part B, Pages 711-716
NO Producción Científica
DS UVaDOC
RD 18-nov-2024