Figure 4

(a) The fabrication process of the SiO2@LaPO4:Eu@SiO2. TEM images of (b) SiO2, (c) SiO2@MABA-Si, (d) SiO2@La:Eu, (e) SiO2@LaPO4:Eu, (f,g) SiO2@LaPO4:Eu@SiO2 (Inset f: SAED).

(a) The fabrication process of the SiO2@LaPO4:Eu@SiO2. TEM images of (b) SiO2, (c) SiO2@MABA-Si, (d) SiO2@La:Eu, (e) SiO2@LaPO4:Eu, (f,g) SiO2@LaPO4:Eu@SiO2 (Inset f: SAED).