Session P22: Focus Session: Organic Electronics: FETs II
8:00 AM–10:48 AM, Wednesday, March 12, 2008
Morial Convention Center Room: 214
Sponsoring Units:
DMP DPOLY
Chair: Michael Chabinyc, Palo Alto Research Center
Abstract ID: BAPS.2008.MAR.P22.9
Abstract: P22.00009 : Chemical Vapor Sensing Using Dual Channel Hybrid Organic/Inorganic Field-Effect Transistors
10:00 AM–10:12 AM
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Abstract 
Authors:
Shannon Lewis
(The University of Texas at Austin)
Sebastian Schoefer
(The University of Texas at Ausitn)
Deepak Sharma
(The University of Texas at Austin)
Ananth Dodabalapur
(The University of Texas at Austin)
We have developed a field-effect chemical sensing device architecture in which two semiconducting channels are employed, one of which is exposed to the analyte and is chemically sensitive. The second channel (usually silicon) is used for signal transduction/amplification. Such sensors work can work in many device modes including one that can be described as a ``chemical memory mode''. For the chemically sensitive channel, several classes of materials can be employed including small molecule organic semiconductors, conjugated polymers, and inorganic oxides such as SnO$_{x}$. With organic semiconductor channels, it is possible to demonstrate charge trapping of volatile organic molecules with significant dipole moments such as ketones and alcohols. We will describe the physics of operation of such sensors in various modes and also outline how the selectivity/sensitivity can be enhanced by incorporating organic receptors.
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2008.MAR.P22.9