Table 1: Comparison between the CuO and Co3O4 nanoparticle sizes calculated from X-ray, TEM, and AFM.

X-rayTEMAFM

CuO NCs14 nm ± 110 nm ± 210 nm ± 2
Co3O4 NCs14 nm ± 1.313 nm ± 29 nm ± 2