Facile synthesis of mono-disperse sub-20 nm NaY(WO₄)₂:Er³⁺,Yb³⁺ upconversion nanoparticles: a new choice for nanothermometry

Abstract

The morphology of NaY(WO4)2:Er,Yb nanoparticles and the thermal sensitive upconversion luminous (UCL) mechanism correspond to temperature sensing behavior.

Luminescent Yb3+,Er3+-Doped α-La(IO3)3 Nanocrystals for Neuronal Network Bio-Imaging and Nanothermometry

“…At 25 °C, the Sr value for our system is 1.2% K −1 , which is comparable the values obtained in other Yb 3+ ,Er 3+ doped oxide or fluoride nanocrystals [15,42]. Under those experimental conditions, the temperature uncertainty, δT, is evaluated at ~0.5 °C.…”

Upconversion luminescence and temperature sensing properties of NaGd(WO4)2:Yb3+/Er3+@SiO2 core–shell nanoparticles

“…The decay time of the green and the red UC emission is 2–3 times longer than those for NaY(WO 4 ) 2 :Er 3+ /Yb 3+ UCNPs in our previous work. 39 Reason is that the UCNPs in this work is relatively large in size and is thermally treated, thus the quenching from defects and surrounding ligands is largely suppressed.…”

Rational Design of Ratiometric Luminescence Thermometry Based on Thermally Coupled Levels for Bioapplications

“…[ 68 ] As another ideal selections for 4 S 3/2 / 2 H 11/2 TCLs‐based thermometers, oxides with excellent thermal and chemical stabilities have been paid increasing attentions in last five years, such as niobates, titanates, vanadates, tungstates, and molybdates. [ 69–74 ] Remarkably, bright green‐emitting AgLa(MoO 4 ) 2 :Er 3+ , Yb 3+ phosphors were developed with small overlapping between 4 S 3/2 and 2 H 11/2 → 4 I 15/2 transitions. [ 75 ] As shown in Figure 5c,d, high S a value of 0.018 K –1 was reached at 480 K, which was explained by the high radiative rate of hypersensitive transition 2 H 11/2 → 4 I 15/2 in double molybdate matrixes.…”