Self-supported films of poly(methyl methacrylate) (PMMA) containing TmIII-doped upconverting core@shell nanoparticles as high sensitivity temperature optical probe

[Display omitted] •Optical thermal sensing based on Ln-UCNP- PMMA composites.•High relative thermal sensitivity (Sr>1% K−1) in the temperature range from 200 to 313 K.•Relative thermal sensitivity of 2.14% K−1 at 298 K. In this work, we describe the synthesis, and thermal sensitivity of a composi...

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Bibliographic Details
Published in:Sensors and actuators. A. Physical. 2019-06, Vol.291, p.1-6
Main Authors: Rodrigues, Emille M., Gálico, Diogo A., Mazali, Italo O., Sigoli, Fernando A.
Format: Article
Language:English
Subjects:
Composite materials
Core-shell particles
Emission
Gadolinium
Heat conductivity
Lanthanides
Nanoparticles
Nanothermometry
Optical probe
Poly(methyl metacrilate)
Polymethyl methacrylate
Sensitivity
Sensitivity analysis
Temperature
Thin films
Thulium
Upconversion
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Summary:[Display omitted] •Optical thermal sensing based on Ln-UCNP- PMMA composites.•High relative thermal sensitivity (Sr>1% K−1) in the temperature range from 200 to 313 K.•Relative thermal sensitivity of 2.14% K−1 at 298 K. In this work, we describe the synthesis, and thermal sensitivity of a composite material containing NaYbF4:Gd:Tm:Ho@NaYF4:Yb Ln-UCNP dispersed in PMMA matrix. The LIR between Tm3+ upconversion emissions at 450 and 475 nm resulted in a high relative thermal sensitivity of 2.8% K−1 at 313 K and an operational range higher than 100 K (from 200 to 313 K) which is not very explored in the literature. The upconversion emission intensity variation as a function of the pump power, provided a suggestion for the emission mechanism of Tm3+, which corroborates with the high obtained thermal sensitivity. The easy manipulation as well as its high sensitivity and large operational range shows the potential of this material to be used as thermal sensor into a temperature range of interest in aerospacial research.
ISSN:0924-4247
1873-3069
DOI:10.1016/j.sna.2019.03.019