Figure 2
SEM images of the letter `NT' pattern, an array of spots, produced on PR-coated sapphire substrates with exposure of (a) 1.4, (b) 1.6, (c) 1.8 and (d) 2.6 s. The inset of (a) shows a high-magnification SEM image taken from the region of interest indicated by the yellow box in (a). The scale bars represent 200 nm. |