Carbon Nanotube-Based Electrochemical Sensors: Principles and Applications in Biomedical Systems
Figure 11
Fabrication scheme of the NEAs (A): (a) Ni nanoparticles electrodeposition; (b) aligned carbon nanotube growth; (c) coating of SiO2 and M-Bond; and (d) polishing to expose CNTs. Scanning electron microscope images of the NEAs (B): (a) Top view; (b)–(f) from a side view. All of the scale bars represent 5 m. (a) Electrodeposited Ni nanoparticles; (b) low site density aligned CNTs array; (c) CNTs array coated with SiO2 and an epoxy layer, (d) close-up look at a single half-embedded CNTs; (e) CNTs after polishing; and (f) second electrodeposition of Ni nanoparticles on the broken CNTs only. [Adapted with permission from Tu et al. [202], Nano Lett. , 3, 107 (2003). Copyright 2003, American Chemical Society.]
