708519.fig.001a
(a)
708519.fig.001b
(b)
708519.fig.001c
(c)
708519.fig.001d
(d)
Figure 1: TEM images of TiO2 NR obtained by oleic acid-oleylamine high-temperature method after (a) 2.5, (b) 4, (c) 6, and (d) 8 hours of reflux.