“…Many synthetic methodologies have been employed to achieve ZnO nanowires, including ball-milling [12] , chemical bath deposition [13,14] , physical vapor deposition (PVD) [5] , hydrothermal process or two step method [15][16][17] , electrochemical deposition [18] , sonochemical [19] , pulsed-laser deposition [20] , vapor phase deposition [21] , radio frequency magnetron sputtering [22] , sol-gel [23] , spray pyrolysis [24] , microwave irradiation [25] and chemical vapor deposition [26,27] . ZnO nanostructures such as nanowires have been extensively studied for many applications including photo-detectors [28,29] , solar cells [30][31][32][33][34][35][36][37][38] , sensors [39][40] light-emitting diodes [41] and photo catalysis [42][43][44] .…”