with irregular matrix for FeAH and FeBH to more irregular shapes (axial ratios a/b ≠1) with regular matrix for FeCT, FeMC and FePM samples. The shape of Fe-AH (Fig. ) and Fe-BH (Fig. ) nanoparticles is symmetrical with fuzzy and irregular matrices. However, the samples with capping ligands like Fe-MC (m-o) and FePM (q-s) show the emergence of sheet-like nanoparticles with regular matrices. Likewise, the FeCT (i-k) shows the evolution of rod-like nanoparticles. However, the experiments with external ligands as additives in the solution (FeCT, FeMC, and FePM) have shown diffusion-controlled differential growth rates of specific crystallite faces and have resulted in a specific shape of the nanoparticles. In addition, the SAED pattern of the samples shows a slight shift from the polycrystalline (Fig. )) to monocrystalline (Fig. (l,p&t))