Fig. 7From: Electro-Optical Properties of Low-Temperature Growth Indium-tin-oxide Nanowires Using Polystyrene Spheres as Catalyst(a) The SEM image of PS spheres (size of 670 nm), which were coated on GaN wafer (2 in.) by self-assembly. (b) The PS spheres were etched by oxygen plasma for 200 s to modify the morphology and to reduce the diameter of PS spheres to ~500 nm while increasing the distance between PS spheresBack to article page