Fig. 3From: Hydrothermal Etching Treatment to Rutile TiO2 Nanorod Arrays for Improving the Efficiency of CdS-Sensitized TiO2 Solar CellsThe top views of CdS QD-sensitized TiO2 NRAs which was etched for different times a 0, b 4, c 5, and d 6 h. e and f give the typical TEM images of CdS-sensitized 6-h-etched TiO2 NRAsBack to article page