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Array-Based Vapor Sensing Using Chemically Sensitive, Carbon Black−Polymer Resistors

Lonergan, Mark C. and Severin, Erik J. and Doleman, Brett J. and Beaber, Sara A. and Grubbs, Robert H. and Lewis, Nathan S. (1996) Array-Based Vapor Sensing Using Chemically Sensitive, Carbon Black−Polymer Resistors. Chemistry of Materials, 8 (9). pp. 2298-2312. ISSN 0897-4756. https://resolver.caltech.edu/CaltechAUTHORS:20180319-153251654

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Abstract

We describe herein the construction of a simple, low-power, broadly responsive vapor sensor. Carbon black−organic polymer composites have been shown to swell reversibly upon exposure to vapors. Thin films of carbon black−organic polymer composites were deposited across two metallic leads, and swelling-induced resistance changes of the films signaled the presence of vapors. To identify and classify vapors, arrays of such vapor-sensing elements were constructed, with each element containing the same carbon black conducting phase but a different organic polymer as the insulating phase. The differing gas−solid partition coefficients for the various polymers of the sensor array produced a pattern of resistance changes that can be used to classify vapors and vapor mixtures. This type of sensor array resolved common organic solvents, including molecules of different classes (such as aromatics from alcohols) as well as those within a particular class (such as benzene from toluene and methanol from ethanol). The response of an individual composite to varying concentrations of solvent was consistent with the predictions of percolation theory. Accordingly, significant increases in the signals from array elements were observed for carbon black−polymer composites that were operated near their percolation thresholds.


Item Type:Article
Related URLs:
URLURL TypeDescription
https://doi.org/10.1021/cm960036jDOIArticle
https://pubs.acs.org/doi/abs/10.1021/cm960036jPublisherArticle
https://pubs.acs.org/doi/suppl/10.1021/cm960036jPublisherSupporting Information
ORCID:
AuthorORCID
Grubbs, Robert H.0000-0002-0057-7817
Lewis, Nathan S.0000-0001-5245-0538
Additional Information:© 1996 American Chemical Society. Received January 22, 1996. Revised Manuscript Received April 15, 1996. Publication Date (Web): September 12, 1996. This work was supported in part by the Caltech Consortium in Chemistry and Chemical Engineering, the E.I. DuPont de Nemours and Co., Inc. and the Eastman Kodak Co., and by the National Aeronautics and Space Administration and the National Science Foundation, Grant CHE-9202583. M.C.L. acknowledges Caltech for an Arthur Amos Noyes Fellowship and B.J.D. acknowledges the Natural Science and Engineering Research Council of Canada for a 1967 Centennial Fellowship and the O'Brien Foundation for financial support.
Funders:
Funding AgencyGrant Number
Caltech Consortium in Chemistry and Chemical EngineeringUNSPECIFIED
E.I. DuPont de Nemours and Company, Inc.UNSPECIFIED
Eastman Kodak CompanyUNSPECIFIED
NASAUNSPECIFIED
NSFCHE-9202583
Caltech Arthur Amos Noyes FellowshipUNSPECIFIED
Natural Science and Engineering Research Council of Canada (NSERC) UNSPECIFIED
O'Brien FoundationUNSPECIFIED
Other Numbering System:
Other Numbering System NameOther Numbering System ID
Caltech Division of Chemistry and Chemical Engineering9134
Issue or Number:9
Record Number:CaltechAUTHORS:20180319-153251654
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20180319-153251654
Official Citation:Array-Based Vapor Sensing Using Chemically Sensitive, Carbon Black−Polymer Resistors. Mark C. Lonergan, Erik J. Severin, Brett J. Doleman, Sara A. Beaber, Robert H. Grubbs, and Nathan S. Lewis. Chemistry of Materials 1996 8 (9), 2298-2312. DOI: 10.1021/cm960036j
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:85366
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:02 Apr 2018 18:44
Last Modified:03 Oct 2019 19:30

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