Figure 5.

TEM images of (a) tapered ZnO nanowires (b, c) nanowire with uniform diameter, inset in figure c shows diffraction pattern. (d) TEM image of straight and tapered nanowires indicating the growth directions.

Kar et al. Nanoscale Res Lett 2011 6:3   doi:10.1007/s11671-010-9738-3