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. 2016 Jul 22;6:30113. doi: 10.1038/srep30113

Figure 1. Diffuse reflection spectroscopy (DRS) showing the Fe(III) shifting band gap excitation of TiO2 to visible region in the samples: (1) TiO2-PE (8 min) (2) FeOx-PE, (2 min) (3) sequentially sputtered FeOx/TiO2-PE (2 min FeOx/8 min TiO2) and (4) co-sputtered FeOx-TiO2-PE for (2 min).

Figure 1