Fabrication of Mesostructured Silica and Titania Rods on Substrates by Using Polycarbonate Membranes : Figure 2

(a) Silica

(b) Titania

(c) Silica

(d) Titania

Figure 2: SEM images of mesoporous silica (a) and (c) and titania (b) and (d) rods on the silicon substrate: Figures (a) and (b) are top-surface images, while Figures (c) and (d) are cross-sectional images.