Novel gas sensors based on carbon nanotube networks

Novel resistive gas sensors based on single-walled carbon nanotube (SWNT) networks as the active sensing element nave been investigated for gas detection. SWNTs networks were fabricated by airbrushing on alumina substrates. As-produced- and Pd-decorated SWNT materials were used as sensitive layers for the detection of NO₂ and H₂, respectively. The studied sensors provided good response to NO₂ and H₂ as well as excellent selectivities to interfering gases.