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X-ray diffraction pattern of coated HA particles. Samples are annealed at (a) and (b) . Principal diffraction peaks of the (X1) and (X2) are shown (Refs. 24 and 25).
Bright-field TEM image showing the typical morphology of coated HA particles heated at , and the inset is the selected area electron diffraction pattern from the HA substrate. (b) EDS spectra acquired from the HA nanoparticle substrate and nanoparticles.
High resolution TEM image showing the crystalline feature of HA nanoparticles heated at . The lattice image (inset in Fig. 3) of a nanoparticle showing dark contrast can be indexed by the structural data of the cubic phase.
Luminescence spectra of coated HA nanoparticles heated at .
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