Energy-dispersive X-ray (EDX) mapping showed a homogeneous elemental distribution of Zn and Cu in the sample (Figure ), indicating the successful formation of an alloy. Furthermore, EDX quantitative analysis revealed a composition of 93 atom% and 7 atom% for Zn and Cu, respectively (Figure ). Therefore, hereafter we refer to this alloy as Zn93Cu7. The successful formation of the alloy was also confirmed by X-ray diffraction (XRD), which mainly exhibited crystal planes of pure Zn and minor peaks of a ZnCu4 phase (Figure ), with no evidence of pure Cu. Hence, the XRD results indicate that Cu was homogeneously distributed within the Zn matrix, in agreement with EDX mapping.