Multifunctional chemical vapor sensors of aligned carbon nanotube and polymer composites |
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Authors: | Wei Chen Dai Liming Roy Ajit Tolle Tia Benson |
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Affiliation: | Department of Chemical and Materials Engineering, School of Engineering, University of Dayton, Dayton, Ohio 45469-0240, USA. |
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Abstract: | Partially coating perpendicularly aligned carbon nanotube arrays with an appropriate polymer thin film along their tube length provides a novel concept for developing new sensors of high sensitivity, good selectivity, and excellent environmental stability for the detection of a broad class of chemical vapors with low power consumption. The absorption and desorption of chemical vapors by the polymer matrix cause changes in the inter-tube distance and, hence, the surface resistance across the nanotube film. Simple measurements of the resistance change, therefore, constitute the nanotube-polymer chemical vapor sensors. These rationally designed, aligned carbon nanotube-polymer composite films are flexible and can be effectively integrated into many systems for a wide range of potential applications, including their use as multifunctional sensors for sensing chemical vapors, mechanical deformations, thermal and optical exposures. |
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