A carbon nanotube based
electromagnetic resonator that is capable of detecting presence
of gases with high selectivity and sensitivity (parts per billion).
It exhibits appreciable shifts in resonant frequency to both
polar (NH3 & CO) and non-polar gases (He, Ar, N2, and O2).
In general, the resonant frequency shifts scale according to
the dielectric constants of the gases under test. Our sensor
is operated at room temperature and can be used in a remote
sensing system. In addition to inorganic gases, it can also
detect the presence of organic molecules. |