Effect of the nanoparticle size on thermometric properties of a single-band ratiometric luminescent thermometer in NaYF₄:Nd³⁺

Abstract

Due to the fact that temperature is one of the key physical quantities determining the occurrence of physical phenomena, chemical reactions or biological processes, one of the important issues to be solved is the precise determination of temperature.

The role of Nd3+ concentration in the modulation of the thermometric performance of Stokes/anti-Stokes luminescence thermometer in NaYF4:Nd3+

“…Despite the small difference in the particle size was observed when the Nd 3+ concentration was changed NaYF 4 :x%Nd 3+ (x = 0.1, 1, 2, 5, 25, 50, 75) this effect should not affect significantly the spectroscopic properties of the analyzed nanoparticles, as shown recently by Trejgis et al 41 . Therefore the change in their luminescence properties can be discussed in terms of the Nd 3+ concentration effect.…”

Cr3+‐Facilitated Ultra‐Sensitive Luminescence Ratiometric Thermometry at Cryogenic Temperature

“…At beginning, the lanthanide series, including Tm 3+ , Ho 3+ , Nd 3+ , Dy 3+ , Sm 3+ , Eu 3+ , etc., have presented their potential application for optical thermometry. [16][17][18][19][20][21] The most classic and well-known example belongs to the Er 3+ -doped materials. [17] The 2 H 11/2 / 4 S 3/2 states of Er 3+ are separated by a gap of 700 cm −1 , meaning that the populations at the 2 H 11/2 / 4 S 3/2 states are dominated by the Boltzmann distribution, the intensity ratio of which therefore could be considered as an indicator of temperature.…”

Advancements in excited state absorption-based luminescence thermometry

“…In addition, the high probability of non-radiative processes leads to more efficient depopulation of the level from which ESA occurs. The benefits of using a low-phonon energy matrix for SBR-type thermometry were confirmed by Trejgis et al 57 By using NaYF 4 :Nd 3+ nanocrystals, it was possible to achieve S R 4 15% K À1 sensitivity. In addition, the reduction in non-radiative processes associated with the nanocrystal surface by increasing the nanoparticle size made it possible to lower the temperature at which high relative sensitivity values were achieved.…”