516806.fig.002a
(a)
516806.fig.002b
(b)
516806.fig.002c
(c)
516806.fig.002d
(d)
Figure 2: FESEM image and EDS mapping of the NT2 sample: (a) the panoramic FESEM image; (b) O-mapping; (c) N-mapping; (d) Ti-mapping.