Selective Synthesis and Luminescence Properties of Nanocrystalline GdF3:Eu<sup>3+</sup>
 with Hexagonal and Orthorhombic Structures

<table>Photoluminescence excitation spectra of the GdF<sub>3</sub>:Eu<sup>3+</sup> nanocrystals ((a) hexagonal, (b) and (c) orthorhombic).</table>

Journal of Nanomaterials

Figure 8: Selective Synthesis and Luminescence Properties of Nanocrystalline GdF3:Eu<sup>3+</sup>
 with Hexagonal and Orthorhombic Structures 