Figure 6
Nanostructures on micro tips obtained using the dry etching method: (a) top view of a low-magnification micrograph, (b) side view of nanostructures on the profile of the tips, and (c) high-magnification SEM image of nanostructures on the profile. (a) Shows an array image of micro tips obtained using the dry etching method, with a magnified view in (b). (b) Indicates that nanostructures are growing well on the profile of the tips, with a height of approximately 1 μm. (c) Shows highly dense grass that is even denser than that observed for the flat growth situation using the wet etching method (Fig. 3(c)).
