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Chemiresistors for Array-Based Vapor Sensing Using Composites of Carbon Black with Low Volatility Organic Molecules

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. 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.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1021/cm060905xDOIArticle
http://pubs.acs.org/doi/full/10.1021/cm060905xPublisherArticle
ORCID:
AuthorORCID
Brunschwig, Bruce S.0000-0002-6135-6727
Lewis, Nathan S.0000-0001-5245-0538
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.
Funders:
Funding AgencyGrant Number
NIHUNSPECIFIED
Army Research Office (ARO)UNSPECIFIED
Issue or Number:22
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:03 Oct 2019 16:33

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