Figure 2
From: Highly Uniform Epitaxial ZnO Nanorod Arrays for Nanopiezotronics
FESEM images on all-ZnO nanorod arrays prepared by soft-masking method in honeycomb (a,d) and on triangular (b,c) arrangements. The single crystal nanorods have hexagonal cross-sections; the uniformity of diameter can be <2% (b inset). When the concentration of the growth solution is increased to 40 mM, a coalescence of nanorods is observed (d)