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

Figure 3

TEM images and HRTEM images (bottom inset) of (a) the NaYF₄:Yb,Er NPs, (b) the NaYF₄:Yb,Er@silica NPs, (c) the NaYF₄:Yb,Er@NaYF₄ NPs, and (d) the NaYF₄:Yb,Er@NaYF₄@silica NPs. Diffraction patterns (top inset) of (a) the NaYF₄:Yb,Er NPs and (b) the NaYF₄:Yb,Er@silica NPs [66]. Copyright 2009 Materials Research Society.

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