Gas Sensors Based on Locally Heated Multiwall Carbon Nanotubes Decorated with Metal Nanoparticles

Figure 4

(a) Raman image of a pristine carbon nanotube deposited by DEP over gold electrodes, excited with a 473 nm laser line. The inset shows Raman spectrum for carbon nanotube D and G lines; (b) FE-SEM images of Cu decorated CNTs and (c) results of EDS measurements carried out on the pink rectangular area marked in the FE-SEM image in (b).

(a)

(b)

(c)