Fig. 6From: Synthesis and Luminescence Properties of Water Soluble α-NaGdF4/β-NaYF4:Yb,Er Core–Shell NanoparticlesImages of local elemental mapping by EDX line scans for a–d the 2-h-reaction NaGdF4/NaYF4:Yb,Er crystals and e–h the 6-h-reaction NaGdF4/NaYF4:Yb,Er crystals. a, e image of EDX line scans areas. b, f Gd in core. c, g Y in shell. d, h Yb in shellBack to article page