Abstract
A continuous synthesis method for the less than 10 nm core-shell upconversion nanoparticles was developed via coiled tube embedded flask reactors and a flow solvothermal co-participation reaction up to 300 °C. Fast nucleation of hexagonal nanocrystals in less than 9 min residence time was achieved owing to the excellent heating ability of the reactors, and a two-step reaction strategy was created for the synthesis of β-NaYF4:Gd,Yb,Er/Ho/Tm@NaYF4 particles without intermediate purification.
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The authors acknowledge the supports from the National Natural Science Foundation of China (Nos. 21991104 and 92034303).
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Liu, D., Yan, J., Wang, K. et al. Continuous synthesis of ultrasmall core-shell upconversion nanoparticles via a flow chemistry method. Nano Res. 15, 1199–1204 (2022). https://doi.org/10.1007/s12274-021-3625-3
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DOI: https://doi.org/10.1007/s12274-021-3625-3