Figure 1From: TiO2 micro-flowers composed of nanotubes and their application to dye-sensitized solar cellsFESEM images of a Ti surface patterned with protruding dots before the anodizing process. (a) × 2,000 magnification, (b) × 5,000 magnification, (c) × 10,000 magnification, and (d) × 20,000 magnification.Back to article page