Figure 1.

a SEM image and b XRD pattern of the ZnO nanorods array, inset in a is the high-magnification image of a ZnO nanorod; c SEM image and d XRD pattern of the ZnO nanotubes array, inset in c is the high-magnification image of a ZnO nanotube

Wang et al. Nanoscale Research Letters 2010 5:1102-1106   doi:10.1007/s11671-010-9608-z