296727.fig.001a
(a)
296727.fig.001b
(b)
296727.fig.001c
(c)
296727.fig.001d
(d)
Figure 1: Uncoated (a, b) and MWCNT-COOH-coated (c, d) zirconia disc samples. (a, c) Macroview. (b, d) SEM images. A good covering of MWCNT-COOH can be observed on the coated zirconia discs (d).