Affiliation:
1. Universidad Nacional de Rio Cuarto
2. Tomas Bata University in Zlin
Abstract
Polyaniline thin films are chemically functionalized by nucleophilic addition of thiols beareing different functional groups: carboxylic, amine, -dodecyl and sulfonic. The modification is tested using FTIR and XPS spectroscopy. Then, the films are used as resistive sensors for different volatile organic compounds in a static measuring system. The sensitivity of conducting polymers to alcohols and heptane is strongly affected by the chemical functionalization of the materials. Polyaniline show an increasing signal when the chain length of different alcohols is increased. The incorporation of hydrophilic groups on the PANI chains seems to maintain the trend. On the other hand, the polymer modified with a long alkyl chain (PANI-DOT) show negative response for methanol and the signal increases up to propanol to decrease for longer chains. PANI-DOT show the largest signal for heptane of all polymers tested. Therefore, the functional group attached to the conductive polymer chain can be used to tune the molecular sensitivity of the resistive sensor
Publisher
Trans Tech Publications, Ltd.
Subject
Mechanical Engineering,Mechanics of Materials,General Materials Science
Reference15 articles.
1. K. Arshak, E. Moore, G.M. Lyons, J. Harris, S. Clifford, Sensor Review, Vol. 24(2004) p.181198.
2. S. K. Brown, M. R. Sim, M. J. Abramson, C. N. Gray, Indoor Air, Vol. 4(1994) pp.123-134.
3. B.G. Lewis and D.C. Paine, MRS Bulletin, Vol. 63(2000) pp.22-27.
4. P.N. Bartlett, J.W. Gardner, NATO Advanced Research Workshop on Sensors and Sensory Systems for an Electronic Nose, Plenum Press: New York, (1991) pp.31-38.
5. S.A. Jahnke, J. Niemann, W. Kautek, R. Bischoff, C. Pfeiffer, G. Kossmehl, Int. J. Environ. Anal. Chem. Vol. 67(1997) pp.223-236.
Cited by
4 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献