Facile-Controlled Epitaxial Growth Direction of Heterogeneous Core/Shell Structured NaLnF₄ Nanocrystals through Traditional Methods

Figure 2

(a) TEM image and (b) HRTEM image of dumbbell-like nanoparticles with epitaxial growth of NaNdF₄ shell in the [100] direction (transverse growth); (c) TEM image and (d) XRD patterns of nanoparticles obtained after 15 min of reaction (inset in (a) and (c): schematic epitaxial growth of NaNdF₄ in the transverse direction; inset in (b): elemental distribution of a single pie-shaped nanoparticle along the transverse direction).

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