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. 2019 Apr 3;9:5553. doi: 10.1038/s41598-019-42060-w

Figure 4.

Figure 4

(a) XRD pattern, (b) representation of Kubelka-Munk function employed to estimate the band gap value, (c) photoluminescence spectrum, (d,e) High resolution XPS spectra of Cu 2p3/2 and O 1 s core levels for the ZnO-CuxO core-shell nanowire arrays.