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. 2016 Apr 11;6:24276. doi: 10.1038/srep24276

Figure 2.

Figure 2

(a,b) SEM images of top view of a nanostructured CuO surface. (c,d) SEM images of side view of a FIB milled nanostructured CuO surface. The thicknesses of CuO and Cu2O layers are about 800 nm and 300 nm, respectively.