“…ZnO NRAs show great potential applications for next generation nanodevices. [1][2][3][4] Among CdO, WO 3 , TiO 2 , SnO 2, MgO, In 2 O 3 and ZnO metal oxides, 5 ZnO is widely used. ZnO nanostructures are manipulated as key materials in solar cells, 6,7 electromechanical devices, 8 ultraviolet (UV) lasers, 9 light-emitting and Schottky diodes, 10 eld emission devices, 11 high performance nanosensors, 12 piezoelectric nanogenerators, 13 biosensors, 14 nanopiezotronics, 15 surface acoustic wave devices, 16 at panel displays, 17 quantum dot devices, 18 bio safety and bio-compatibility 19 due to their intrinsic properties of non-toxicity, and good electrical and optical features.…”