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

Figure 3

FE-SEM images of (a) a gap of 5 m deep and 1 m wide milled by FIB in the central region of the line connecting the pads. The inset shows a chip composed of four gold electrodes; a sensor is composed of one (b) or several (c) nanotubes depending on the deposition conditions.

(a)

(b)

(c)