A Simple Method to Control the Growth of Copper Oxide Nanowires for Solar Cells and Catalytic Applications

Figure 5

Effect of the bending stresses on the NWs density. Arrows indicate the corresponding stresses. In-plan tensile stresses on the top surface of the bent region (region a) result in the growth of dense NWs. On the contrary, the unbent region (region c) is covered by less dense NWs because of the grain size.