Figure 18From: Friction-Induced Nanofabrication: A ReviewFabrication of pyramid tip arrays by indentation-induced selective etching on silicon surface [72]: (a) & (b) AFM images of indented regions produced under 2, 3, and 4 m·N before and after the etching in KOH solution for 10 min, (c) cross-sectional profiles of fabricated tips were obtained from the dotted lines marked in (b)Back to article page