RT Journal Article A1 Di Liu,Junyu Yan,Kai Wang,Yundong Wang,Guangsheng Luo; AD 化学工程联合国家重点实验室, 中国 ; 化学工程联合国家重点实验室, 中国 ; 化学工程联合国家重点实验室, 中国 ; 化学工程联合国家重点实验室, 中国 ; 化学工程联合国家重点实验室, 中国 T1 Continuous synthesis of ultrasmall core–shell upconversion nanoparticles via a flow chemistry method YR 2022 IS 2 vo 15 OP 1199-OP 1204 K1 core–shell structure;sodium rare earth tetrafluoride;upconversion nanoparticle;flow chemistry synthesis AB 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 ℃. 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. SN 1998-0124 LA EN