Core-Shell Structure in Doped Inorganic Nanoparticles: Approaches for Optimizing Luminescence Properties

Figure 4

TEM images of (a) ~30 nm Au/~25 nm SiO₂, (b) ~30 nm Au/~25 nm SiO₂/~12 nm Y₂O₃:Yb³⁺,Er³⁺, (c) ~30 nm Au/~30 nm SiO₂, (d) ~30 nm Au/~30 nm SiO₂/~12 nm Y₂O₃:Yb³⁺,Er³⁺, (e) ~30 nm Au/~40 nm SiO₂, (f) ~30 nm Au/~40 nm SiO₂/~12 nm Y₂O₃:Yb³⁺,Er³⁺, (g) ~30 nm Au/~45 nm SiO₂, and (h) 30 nm Au/~45 nm SiO₂/~12 nm Y₂O₃:Yb³⁺,Er³⁺ [92]. Copyright Ivyspring International Publisher.