Figure 3.

High-resolution TEM micrographs with marked interplanar distancedvalues of (a) GCs and (b) NCs. The insets are the simplified models for GCs and NCs, where the large white spheres stand for β-PbF2 nanocrystals, and small black spheres in GCs are for Nd3+ ions.

Yu et al. Nanoscale Research Letters 2012 7:275   doi:10.1186/1556-276X-7-275
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