Figure 2.

a SEM image of the porous ZnO nanobelts on Si substrate. The scale bar is 500 nm. b TEM image of a single porous ZnO nanobelt. The inset is HRTEM of several ZnO nanoparticles. The scale bar is 50 nm. c TEM image of a single solid ZnO nanobelt. The inset is SAED. The scale bar is 500 nm

Wang et al. Nanoscale Research Letters 2010 5:1800-1803   doi:10.1007/s11671-010-9715-x