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

Publication date: Available online 15 March 2019Source: Sensors and Actuators A: PhysicalAuthor(s): Emille M. Rodrigues, Diogo A. Gálico, Italo O. Mazali, Fernando A. SigoliAbstractIn 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 temperature range of interest in aerospacial research.Graphical Abstract

Source: Sensors and Actuators A: Physical - March 16, 2019 Category: Physics Source Type: research