Figure 1From: Selective Growth of Vertical-aligned ZnO Nanorod Arrays on Si Substrate by Catalyst-free Thermal EvaporationCross-sectional FE-SEM images of ZnO nanorods synthesized on the ZnO films prepared by RF sputtering (a) and PLD (b), respectively. The inset in (a) shows the top view of the corresponding sample, the inset in (b) is the corresponding enlarged imageBack to article page