Researchers at UC San Diego have developed a field-effect transistor device with a semiconducting organic thin-film as an active channel material capable of absorbing chemical vapors. The channel conductance changes in the presence of chemical vapors. Experimental data on a number of analytes shows markedly improved sensitivity over existing devices, and a base-line drift in the presence of chemical vapors of less than 0.03 percent / hr.
This sensor device can be utilized in handheld gas chromatographs, or as a household sensor for detecting gas leakage. Other applications are explosive vapor detector at airport security checkpoints and chemical warfare agent detection.
This technology is presently available for licensing.
|United States Of America||Issued Patent||8,384,409||02/26/2013||2007-176|