Gao, Ting and Woodka, Marc D. and Brunschwig, Bruce S. and Lewis, Nathan S. (2006) Chemiresistors for Array-Based Vapor Sensing Using Composites of Carbon Black with Low Volatility Organic Molecules. Chemistry of Materials, 18 (22). pp. 5193-5202. ISSN 0897-4756. doi:10.1021/cm060905x. https://resolver.caltech.edu/CaltechAUTHORS:20170201-141754490
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Abstract
Chemically sensitive resistors have been fabricated from composites of carbon black and low volatility, nonpolymeric, organic molecules such as propyl gallate, lauric acid, and dioctyl phthalate. Sorption of organic vapors into the nonconductive phase of such composites produced rapid and reversible changes in the relative differential resistance response of the sensing films. Arrays of these sensors, in which each sensing film was comprised of carbon black and a chemically distinct nonpolymeric organic molecule or blend of organic molecules, produced characteristic response patterns upon exposure to a series of different organic test vapors. The use of nonpolymeric sorption phases allowed fabrication of sensors having a high density of randomly oriented functional groups and provided excellent discrimination between analytes. By comparison to carbon black−polymer composite vapor sensors and sensor arrays, such sensors provided comparable detection limits as well as enhanced clustering and enhanced resolution ability between test analytes.
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| Additional Information: | © 2006 American Chemical Society. Received 19 April 2006. Published online 28 September 2006. Published in print 1 October 2006. The authors thank Dr. Brian Sisk, Dr. Erik J. Severin, and Edgardo García-Berríos for valuable discussions. Research was carried out in the Molecular Materials Research Center of the Beckman Institute at Caltech. This work was partially supported by the National Institutes of Health and by the ARO under the Institute for Collaborative Biotechnologies. | |||||||||
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| Issue or Number: | 22 | |||||||||
| DOI: | 10.1021/cm060905x | |||||||||
| Record Number: | CaltechAUTHORS:20170201-141754490 | |||||||||
| Persistent URL: | https://resolver.caltech.edu/CaltechAUTHORS:20170201-141754490 | |||||||||
| Official Citation: | Chemiresistors for Array-Based Vapor Sensing Using Composites of Carbon Black with Low Volatility Organic Molecules Ting Gao, Marc D. Woodka, Bruce S. Brunschwig, and Nathan S. Lewis Chemistry of Materials 2006 18 (22), 5193-5202 DOI: 10.1021/cm060905x | |||||||||
| Usage Policy: | No commercial reproduction, distribution, display or performance rights in this work are provided. | |||||||||
| ID Code: | 73950 | |||||||||
| Collection: | CaltechAUTHORS | |||||||||
| Deposited By: | Ruth Sustaita | |||||||||
| Deposited On: | 01 Feb 2017 22:53 | |||||||||
| Last Modified: | 11 Nov 2021 05:23 |
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