Fig. 2From: Hydrothermal Etching Treatment to Rutile TiO2 Nanorod Arrays for Improving the Efficiency of CdS-Sensitized TiO2 Solar CellsThe cross-sectional images of TiO2 NRAs before (a) and after 6-h etching treatment (b). The typical TEM images (c) and SAED pattern (inset) of an individual TiO2 nanorod with 6-h etching treatment, enlarged areas marked by white rectangular frame is presented in (d)Back to article page