Schematic diagram of a single ZnO NR. Schematic diagram of a single ZnO NR with fixed ends placed at the trenched zone on the silicon wafer substrate. Inset shows a SEM image of typical suspended NRs on the silicon wafer substrate. The white particles are the residue of broken ZnO NRs.
Soomro et al. Nanoscale Research Letters 2012 7:146 doi:10.1186/1556-276X-7-146