718214.fig.007a
(a)
718214.fig.007b
(b)
718214.fig.007c
(c)
718214.fig.007d
(d)
718214.fig.007e
(e)
718214.fig.007f
(f)
718214.fig.007g
(g)
718214.fig.007h
(h)
Figure 7: Photos of TiO2 nanoparticle suspensions on (a) day 1, (b) week 1, (c) week 2, (d) week 3, (e) week 4, (f) week 5, (g) week 6, and (h) week 8.