A Review of Carbon Nanotubes-Based Gas Sensors

Figure 32

Scanning electron microscope (SEM) images of types A and B sensors trapped in castellated microelectrode gaps by positive DEP: (a) type A (CNTs trapped onto a Pd microelectrode); (b) type B (CNTs and Pd nanoparticles trapped onto a Cr microelectrode) [80].

(a)

(b)