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Lanthanides in Luminescent Thermometry Chapter 281 359 FIG. 4 Estimating dT by the readout fluctuations of a luminescent thermometer, example of an aqueous suspension (0.30 g L1) of NaYF4:Yb3+/Er3+ NPs, synthesized as described in Xie et al. (2013) and kindly providing by Prof. Dr. X. Liu from the National University of Singapore. (A) To get dT estimation we build the histogram of the D and T measurements. The black and gray interrupted lines mark the position of the maximum and the standard deviation of the distri- butions, respectively. The conversion between the thermometric parameter and temperature is made using the calibration curve represented by the solid green (dark gray in the print version) line. In (B) we show that, if the sensitivity is decreased by half or increased twice, the resulting dT displays the opposite trend (increases twice or decreases by half, respectively). FIG. 5 (A) UV-excited [(Tb0.914Eu0.086)2(PDA)3(H2O)]2H2O MOF (Wang et al., 2015c) under continuous exposition (365 nm, 30 mW cm2) presenting no drifts on the thermometric parameter, which indicates that the ligand-induced Stokes shift does not induce measurable local heating. The solid line corresponds to the mean D at 298 K and the interrupted lines mark the region with- inthe standard deviation of the measurement (2.6K). (B) 808nm laser-induced heating pro- duced in LaF3:Yb3+/Er3+ (orange (gray in the print version) squares) and LaF3:Yb3+/Er3+/Nd3+ (red (dark gray in the print version) squares) NPs as a function of the laser power. The dots are the experimental data and the dashed lines are guide for the eyes. The temperature was measured imaging the powder sample with an IR camera. Notice the higher augmentation of the temperature registered for the Nd3+ containing NPs. Adapted with permission from Ximendes, E.C., Rocha, U., Jacinto, C., Kumar, K.U., Bravo, D., Lopez, F.J., Rodriguez, E.M., Garcia-Sole, J., Jaque, D. 2016. Self-monitored photothermal nanoparticles based on core–shell engineering. Nanoscale 8, 3057–3066. © 2016 The Royal Society of Chemistry.PDF Image | HANDBOOK ON THE PHYSICS AND CHEMISTRY OF RARE EARTHS
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