图 3  (a)−(d) NaYF4:Yb, Tm@NaYF4纳米粒子(粒径约43.8 nm)的结构示意图, TEM图和粒径分布图; (e)−(h) NaYF4:Yb, Tm@NaYF4纳米粒子(粒径约63.2 nm)的结构示意图, TEM图和粒径分布图; (i)−(l) NaYF4:Yb, Tm@NaYF4纳米粒子(粒径约80.8 nm)的结构示意图, TEM图和粒径分布图; (m)−(p) NaYF4:Yb, Tm@NaYF4纳米粒子(粒径约100.7 nm)的结构示意图, TEM图和粒径分布图

Fig. 3.  (a)−(d) The schematic core-shell structure, TEM images and size distribution of NaYF4:Yb, Tm@NaYF4 (about 43.8 nm); (e)−(h) the schematic core-shell structure, TEM images and size distribution of NaYF4:Yb, Tm@NaYF4 (about 63.2 nm); (i)−(l) the schematic core-shell structure, TEM images and size distribution of NaYF4:Yb, Tm@NaYF4 (about 80.8 nm); (m)−(p) the schematic core-shell structure, TEM images and size distribution of NaYF4:Yb, Tm@NaYF4 (about 100.7 nm).