Fig. 2. Size distribution graphs showing the diameter change of (A) MPHs, (B) MPHs with ZnCl2, (C) MPHs with potassium phosphates, and (D) MPHs with ZnCl2 and potassium phosphates when they contact HAp. HAp is in powder form with a mean diameter of 150 nm and is dispersed in DW at a concentration of 0.1% (w/w).
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