Figure 1

SEM images of silica bead self-assembled monolayers with different bead sizes of (a) 310 nm (P310), (b) 520 nm (P520), and (c) 960 nm (P960). Photo images the silica bead monolayers of (d) P310, (e) P520, and (f) P960 deposited on Si substrate of 3 cm × 3 cm. The scale bar in the SEM images is 5 μm.