Synthesis and Characterization of Zinc, Iron, Copper, and Manganese Oxides Nanoparticles for Possible Application as Plant Fertilizers

Figure 3

FTIR spectrum of (a) ZnO NP, (b) Mn₃O₄ NP, (c) Fe₃O₄ NP, and (d) CuO NP.

(a)

(b)

(c)

(d)