ABSTRACT
Gas and smoke sensors have also benefited greatly from the recent advances in nan-
otechnology. This chapter introduces a carbon monoxide (CO) gas detector that uses
gold nanoparticles deposited on an array of carbon nanotubes as a sensing element,
in addition to a smoke detector that achieves miniaturization by replacing a bulky al-
pha particle detection chamber with a silicon nanostructure. These types of detectors
will be available commercially within a time span of 1 to 2 years.
