971942.fig.005a
(a)
971942.fig.005b
(b)
971942.fig.005c
(c)
971942.fig.005d
(d)
Figure 5: AFM-3D images of the carbon plate as model electrode (a), MWNT-modified electrode (b), COOH/MWNT-modified electrode (c), and AChE-ChOx/COOH/MWNT-modified electrode (d).