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Issue 10, 2019
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Facile synthesis of mono-disperse sub-20 nm NaY(WO4)2:Er3+,Yb3+ upconversion nanoparticles: a new choice for nanothermometry

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Abstract

We report a novel optical nanothermometer based on ultra-small NaY(WO4)2:Er3+,Yb3+ (NYW:Yb,Er) upconversion nanoparticles (UCNPs). The monodisperse, diamond-shaped sub-20 nm NYW:Er,Yb UCNPs with an average size of ∼8.5 × 12.5 nm were prepared via a facile one-step thermolysis protocol. Upon 980 nm laser excitation, the NYW:Er,Yb UCNPs yield bright green UC emission. The maximum relative sensitivity (Srel) and absolute sensitivity (Sabs) were determined to be ∼1.2% K−1 at 293 K and ∼0.9% K−1 at 503 K, respectively. The excellent repeatability of fluorescence intensity ratio (FIR) and low temperature uncertainty ΔTmin of ∼0.4 K at 293 K make them promising for optical nanothermometry covering a wide temperature range of 293–503 K.

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

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Publication details

The article was received on 11 Nov 2018, accepted on 02 Feb 2019 and first published on 07 Feb 2019


Article type: Paper
DOI: 10.1039/C8TC05669B
Citation: J. Mater. Chem. C, 2019,7, 2971-2977

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

    M. Lin, L. Xie, Z. Wang, B. S. Richards, G. Gao and J. Zhong, J. Mater. Chem. C, 2019, 7, 2971
    DOI: 10.1039/C8TC05669B

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