Regioregular polythiophene nanowires and sensors.
McCollough-RD; Sauve-G; Li-B; Jeffries-El-M; Santhanam-S; Schultz-L; Zhang-R; Iovu-MC; Cooper-J; Sreedharan-P; Revelli-JC; Kusner-AG; Kowalewski-T; Snyder-JL; Weiss-LE; Lambeth-DN; Fedder-GK
Proc SPIE - Organic Field-Effect Transistors IV, July 31 - August 2, 2005, San Diego, California. Bao Z, Gundlach DJ, eds. Bellingham, WA: International Society for Optical Engineering (SPIE), 2005 Aug; 5940:28-34
We have developed and synthesized highly conductive regioregular poly(3-alkylthiophene) (rr-PAT) derivatives for use in sensor arrays on a chip. Poly(3-alkylthiophene)s are ideally suited for this application because of their excellent electrical properties, solution processability and our ability to modify their chemical structure. Here, we synthesized rr-PATs that have different side chains and different end groups. The polymers were ink-jetted onto ChemFET devices on a chip and their chemical sensing properties were tested to a variety of volatile organic compounds (VOCs). The sensors demonstrated ppm level sensitivity and selectivity to all VOCs tested, including both polar and non-polar compounds.
Polymers; Organic-compounds; Sensitivity-testing; Polymerization; Volatiles;
Author Keywords: polythiophene; conducting polymer; electronic nose; chip; sensor
Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, PA 15213, USA
Proceedings of SPIE - Organic Field-Effect Transistors IV, July 31 - August 2, 2005, San Diego, California