The comparison of Pr3+:LaF3 and Pr3+:LiYF4 luminescent nano- and microthermometer performances

Pudovkin, M.S.; Korableva, S. L.; Koryakovtseva, D. A.; Lukinova, E.V.; Lovchev, A V; Морозов, О. А.; Семашко, В. В.

doi:10.1007/s11051-019-4713-0

Cited by 23 publications

(18 citation statements)

References 52 publications

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“…So, Ho, Tm:KLuW sensors synthesized by the modified sol-gel Pechini methodology, CA and MW, have sizes ranging from 150 nm [ 29 ], 16 nm and 12 nm, respectively, and their corresponding maximum S rel are in the range of 0.90% K −1 , 0.33% K −1 and 0.23% K −1 , respectively. Similar results are obtained in the case of Er 3+ , Yb 3+ :NaYF 4 [ 63 ], Er 3+ :Y 2 O 3 [ 64 ], Pr 3+ :LaF 3 and Pr 3+ :LiYF 4 sensors [ 65 ]. It was argued that as the size of the particles decreases, the amount of the luminescent active ions close to their surfaces is increased due to higher surface to volume ratio.…”

Section: Resultssupporting

confidence: 81%

Effect of the Size and Shape of Ho, Tm:KLu(WO4)2 Nanoparticles on Their Self-Assessed Photothermal Properties

et al. 2021

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The incorporation of oleic acid and oleylamine, acting as organic surfactant coatings for a novel solvothermal synthesis procedure, resulted in the formation of monoclinic KLu(WO4)2 nanocrystals. The formation of this crystalline phase was confirmed structurally from X-ray powder diffraction patterns and Raman vibrational modes, and thermally by differential thermal analysis. The transmission electron microscopy images confirm the nanodimensional size (~12 nm and ~16 nm for microwave-assisted and conventional autoclave solvothermal synthesis) of the particles and no agglomeration, contrary to the traditional modified sol-gel Pechini methodology. Upon doping with holmium (III) and thulium (III) lanthanide ions, these nanocrystals can generate simultaneously photoluminescence and heat, acting as nanothermometers and as photothermal agents in the third biological window, i.e., self-assessed photothermal agents, upon excitation with 808 nm near infrared, lying in the first biological window. The emissions of these nanocrystals, regardless of the solvothermal synthetic methodology applied to synthesize them, are located at 1.45 μm, 1.8 μm and 1.96 μm, attributed to the 3H4 ® 3F4 and 3F4 ® 3H6 electronic transition of Tm3+ and 5I7 ® 5I8 electronic transition of Ho3+, respectively. The self-assessing properties of these nanocrystals are studied as a function of their size and shape and compared to the ones prepared by the modified sol-gel Pechini methodology, revealing that the small nanocrystals obtained by the hydrothermal methods have the ability to generate heat more efficiently, but their capacity to sense temperature is not as good as that of the nanoparticles prepared by the modified sol-gel Pechnini method, revealing that the synthesis method influences the performance of these self-assessed photothermal agents. The self-assessing ability of these nanocrystals in the third biological window is proven via an ex-vivo experiment, achieving thermal knowledge and heat generation at a maximum penetration depth of 2 mm.

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Section: Resultssupporting

confidence: 81%

Effect of the Size and Shape of Ho, Tm:KLu(WO4)2 Nanoparticles on Their Self-Assessed Photothermal Properties

et al. 2021

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“…Pulsed excitation sources operating in the nanosecond regime are frequently used in nanothermometry [7,8], and typical pump sources, such as OPOs or q-switched lasers, are prone to power and energy fluctuations, respectively. As the value of σ abs is wavelength dependent, fluctuations of the emission wavelength can also be treated as energy fluctuations, as can be seen from Equation (5).…”

Section: Influence Of Pump Fluctuations In Pulsed Regimementioning

confidence: 99%

“…However, the pumping regime is mostly overlooked as a potential source of temperature errors although it strongly affects the population densities of the lower energy levels during the measurement. The influence of population densities can be illustrated by comparing the energy level configuration of two commonly used active ions, Erbium (Er 3+ ) [6] and Praseodymium (Pr 3+ ) [7], as depicted in Figure 1a. The combinations of transitions used in Er 3+ nanothermometry are 4 H 11/2 → 4 I 15/2 centered around 525 nm with 4 S 3/2 → 4 I 15/2 centered around 545 nm, therefore including only one lower energy level.…”

Section: Introductionmentioning

confidence: 99%

“…One benefit of using varying lower energy levels is the spectral separation of the emission lines independent of the energy gap of the upper levels, therefore adding flexibility to measurements. Currently, the sensitivity of nanothermometers is characterized either under pulsed excitation [7,8] or continuous excitation [1,3]. This raises the question of whether calibration data acquired with either of these systems are interchangeable, even for the same active ion.…”

Section: Introductionmentioning

confidence: 99%

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Influence of Pumping Regime on Temperature Resolution in Nanothermometry

2021

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In recent years, optical nanothermometers have seen huge improvements in terms of precision as well as versatility, and several research efforts have been directed at adapting novel active materials or further optimizing the temperature sensitivity. The signal-to-noise ratio of the emission lines is commonly seen as the only limitation regarding high precision measurements. The role of re-absorption caused by a population of lower energy levels, however, has so far been neglected as a potential bottleneck for both high resolution and material selection. In this work, we conduct a study of the time dependent evolution of population densities in different luminescence nanothermometer classes under the commonly used pulsed excitation scheme. It is shown that the population of lower energy levels varies when the pump source fluctuates in terms of power and pulse duration. This leads to a significant degradation in temperature resolution, with limiting values of 0.5 K for common systems. Our study on the error margin indicates that either short pulsed or continuous excitation should be preferred for high precision measurements. Additionally, we derive conversion factors, enabling the re-calibration of currently available intensity ratio measurements to the steady state regime, thus facilitating the transition from pulse regimes to continuous excitation.

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“…Thus, both the nature of the doped or co-doped lanthanide ions and the architecture of the lanthanide-doped NPs are the tools for tuning their temperature sensitivity [7][8][9][10]19 . However, the temperature sensitivities (S) defined as the rate of change of the thermo-sensitive parameter with temperature are typically low, usually being below 1% K −1 at the temperatures about 300 K for the major part of the reported lanthanide-doped inorganic NPs [7][8][9][10][11]18,19,[25][26][27][28] .…”

mentioning

confidence: 99%

Terbium(III)-thiacalix[4]arene nanosensor for highly sensitive intracellular monitoring of temperature changes within the 303–313 K range

Zairov

Dovzhenko

Sapunova

et al. 2020

Sci Rep

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The work introduces hydrophilic PSS-[Tb2(TCAn)2] nanoparticles to be applied as highly sensitive intracellular temperature nanosensors. The nanoparticles are synthesized by solvent-induced nanoprecipitation of [Tb2(TCAn)2] complexes (TCAn - thiacalix[4]arenes bearing different upper-rim substituents: unsubstituted TCA1, tert-buthyl-substituted TCA2, di- and tetra-brominated TCA3 and TCA4) with the use of polystyrenesulfonate (PSS) as stabilizer. The temperature responsive luminescence behavior of PSS-[Tb2(TCAn)2] within 293–333 K range in water is modulated by reversible changes derived from the back energy transfer from metal to ligand (M* → T1) correlating with the energy gap between the triplet levels of ligands and resonant 5D4 level of Tb3+ ion. The lowering of the triplet level (T1) energies going from TCA1 and TCA2 to their brominated counterparts TCA3 and TCA4 facilitates the back energy transfer. The highest ever reported temperature sensitivity for intracellular temperature nanosensors is obtained for PSS-[Tb2(TCA4)2] (SI = 5.25% K−1), while PSS-[Tb2(TCA3)2] is characterized by a moderate one (SI = 2.96% K−1). The insignificant release of toxic Tb3+ ions from PSS-[Tb2(TCAn)2] within heating/cooling cycle and the low cytotoxicity of the colloids point to their applicability in intracellular temperature monitoring. The cell internalization of PSS-[Tb2(TCAn)2] (n = 3, 4) marks the cell cytoplasm by green Tb3+-luminescence, which exhibits detectable quenching when the cell samples are heated from 303 to 313 K. The colloids hold unprecedented potential for in vivo intracellular monitoring of temperature changes induced by hyperthermia or pathological processes in narrow range of physiological temperatures.

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The comparison of Pr3+:LaF3 and Pr3+:LiYF4 luminescent nano- and microthermometer performances

Cited by 23 publications

References 52 publications

Effect of the Size and Shape of Ho, Tm:KLu(WO4)2 Nanoparticles on Their Self-Assessed Photothermal Properties

Effect of the Size and Shape of Ho, Tm:KLu(WO4)2 Nanoparticles on Their Self-Assessed Photothermal Properties

Influence of Pumping Regime on Temperature Resolution in Nanothermometry

Terbium(III)-thiacalix[4]arene nanosensor for highly sensitive intracellular monitoring of temperature changes within the 303–313 K range

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