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. 2018 May 28;9(6):264. doi: 10.3390/mi9060264

Figure 5.

Figure 5

Intensity ratios of (a) I(Cu)/I(CuO), (b) I(Cu2O)/I(CuO), (c) I(Cu)/I(Cu2O), and (d) I(Ni)/I(NiO).