Electronic sensing of vapors with organic transistors

We show that organic thin-film transistors have suitable properties for use in gas sensors. Such sensors possess sensitivity and reproducibility in re cognizing a range of gaseous analytes. A wealth of opportunities for chemic al recognition arise from the variety of mechanisms associated with differe nt semiconductor-analyte interactions, the ability to vary the chemical con stitution of the semiconductor end/side groups, and also the nature of the thin-film morphology. (C) 2001 American Institute of Physics.