Table 2. Summary of the Characterization Analysis of the Cu NPs.

information	analytical technique	results
copper release (1 h)	AAS	no H2O2	2.5 μM H2O2	100 μM H2O2
		5.6 ± 0.1%	2.2 ± 0.6%	5.5 ± 0.1%
surface oxides	FTIR	Cu2O, CuO, CuOH
primary NP size	TEM	2–70 nm
agglomerate size	SEM	7–220 nm