Figure 2From: Controlled morphology and optical properties of n-type porous silicon: effect of magnetic field and electrode-assisted LEFMicrographs of nPS samples fabricated using conventional anodization. (a) n++ substrate (42 mA cm- 2, 65 s) and (b) n- substrate (50 V for 30 min). Cross-sectional view of circular macropores of the n- sample is shown in the corresponding inset.Back to article page