Micro structural parameters of undoped and M-doped CuO NPs.

Samples	Crystallite size, D (nm)	Micro-strain ε (×10−2)	Dislocation density, δ (×1015 m−2)	Density of the particles ρ (g cm−3)	Specific surface area, S (m2 g−1)
CuO	13.712	0.75	5.318	6.242	70.101
CuO:Zn	36.132	0.47	0.765	6.343	26.179
CuO:Ni	22.243	0.57	2.021	6.496	41.525
CuO:Mn	19.043	0.71	2.757	6.470	48.698
CuO:Fe	14.474	0.84	4.773	6.232	66.517
CuO:Co	19.666	0.61	2.585	6.470	47.155