“…Cupric oxide (CuO) has potential applications in many fields, such as superconductor [1][2][3], gas sensor [4,5], catalyst [6], magnetic storage media [7] and lithium battery [8]. Especially, some CuO nanostructures have received considerable attention due to their novel physical and chemical properties that are not available from bulk CuO [8][9][10][11][12][13].…”