915461.fig.004a
(a)
915461.fig.004b
(b)
915461.fig.004c
(c)
915461.fig.004d
(d)
915461.fig.004e
(e)
915461.fig.004f
(f)
915461.fig.004g
(g)
915461.fig.004h
(h)
915461.fig.004i
(i)
Figure 4: Schematic diagrams of the stacking architectures of TiO2 nanoparticle layers: (a) T20 (8 μm), (b) T20 (12 μm), (c) T20 (16 μm), (d) T20 (12 μm)+RSP (4 μm), (e) T37 (12 μm), (f) T37 (12 μm)+RSP (4 μm), (g) T37 (6 μm)+T20 (6 μm)+RSP (4 μm), (h) D20 (6 μm)+T20 (6μm)+RSP (4 μm), and (i) T20 (6 μm)+T37 (6 μm)+RSP (4 μm).