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Nanoscale Research Letters
Figure 3 | Nanoscale Research Letters

Figure 3

From: A cylindrical core-shell-like TiO2 nanotube array anode for flexible fiber-type dye-sensitized solar cells

Figure 3

Characterization of surface topography (a) FESEM image of an anodized Ti wire with a diameter of 127 μm; (b) FESEM image of outer surface of an as-anodized Ti wire. (c) Large-scale FESEM image of an anodized Ti wire after chemical etching or ultrasonication. All exposed TiO2 nanotubes were open-ended and the broken part in the porous ATO membrane shows clearly the side-view of the nanotubes. (d) Enlarged FESEM image of individual TiO2 nanotubes which average diameter is about 105 nm.

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