Figure 1.

Schematic illustration of selective growth process of ZnO nanorod arrays: a thin layer of resist polymer (PMMA) spun over cover glass substrate; b pattern transfer by electron-beam lithography; c growth of aligned ZnO nanorod arrays in solution, and d lift-off resist material and residue from the substrate

Ahsanulhaq et al. Nanoscale Research Letters 2009 5:669-674   doi:10.1007/s11671-009-9504-6