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Ultrasensitive and Specific Gas Detection
August 22, 2011
A team lead by Md. Waliullah Khan Nomani, a Ph.D. candidate in Electrical Engineering and involving senior Dean Kersey demonstrated that their sensors using Indium oxide as a gas sensing layer can detect the presence of 20 parts-per-billion NO2. This is the highest detection sensitivity measured for NO2 under atmospheric conditions.
The paper is vailable here:
Furthermore, the team was able to prove that NO2 can be detected in the presence of other gases such as ammonia using a previously disclosed technique published by M. Qazi, T. Vogt, and G. Koley, “Two-dimensional signatures for molecular identification”, Appl. Phys. Lett. 92, 103120(2008) . ( pdf) (Also appears in Virtual Journal of Nanoscale Science and Technology , Mar 24 , 2008) )
Other relevant papers can be found here: