Progress in the development of an electronic nose using arrays of chemically sensitive carbon black-polymer resistors

Brett J. Doleman, Erik J. Severin, Robert D. Sanner, Nathan S Lewis

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

Response data were collected for a carbon black-polymer composite electronic nose array during exposure to homologous series of alkanes and alcohols. At a fixed partial pressure of odorant in the vapor phase, the mean response intensity of the electronic nose signals varied significantly for members of each series of odorants. However, the mean response intensity of the electronic nose detectors, and the response intensity of the most strongly-driven set of electronic nose detectors, was essentially constant for members of a chemically homologous odorant series when the concentration of each odorant in the gas phase was maintained at a constant fraction of the odorant's vapor pressure. Because the thermodynamic activity of an odorant at equilibrium in a sorbent phase is equal to the partial pressure of the odorant in the gas phase divided by the vapor pressure of the odorant, and because the activity coefficients are similar within these homologous series of odorants for sorption of the vapors into specific polymer films, the data imply that the trends in detector response can be understood based on the thermodynamic tendency to establish a relatively constant concentration of sorbed odorant into each of the polymeric films of the electronic nose at a constant fraction of the odorant's vapor pressure. This phenomenon provides a natural mechanism for enhanced sensitivity to low vapor pressure compounds, like TNT, in the presence of high vapor pressure analytes, such as diesel fuel. In a related study to evaluate the target recognition properties of the electronic nose, a statistical metric based on the magnitudes and standard deviations along Euclidean projections of clustered array response data, was utilized to facilitate an evaluation of the performance of detector arrays in various vapor classification tasks. This approach allowed quantification of the ability of a fourteen-element array of carbon black-insulating polymer composite chemiresistors to distinguish between members of a set of nineteen solvent vapors, some of which vary widely in chemical properties (e.g. methanol and benzene) and others of which are very similar (e.g. n-pentane and n-heptane). The data also facilitated evaluation of questions such as array performance as a function of the number of detectors in the system.

Original languageEnglish
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
Pages390-400
Number of pages11
Volume3392
DOIs
Publication statusPublished - 1998
EventDetection and Remediation Technologies for Mines and Minelike Targets III - Orlando, FL, United States
Duration: Apr 13 1998Apr 13 1998

Other

OtherDetection and Remediation Technologies for Mines and Minelike Targets III
CountryUnited States
CityOrlando, FL
Period4/13/984/13/98

Fingerprint

Soot
Carbon black
resistors
Resistors
Vapor pressure
Polymers
Carbon
vapor pressure
Electronics
carbon
Detectors
polymers
Detector
Vapors
electronics
detectors
Polymer Composites
vapors
vapor phases
Series

ASJC Scopus subject areas

  • Applied Mathematics
  • Computer Science Applications
  • Electrical and Electronic Engineering
  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Doleman, B. J., Severin, E. J., Sanner, R. D., & Lewis, N. S. (1998). Progress in the development of an electronic nose using arrays of chemically sensitive carbon black-polymer resistors. In Proceedings of SPIE - The International Society for Optical Engineering (Vol. 3392, pp. 390-400) https://doi.org/10.1117/12.324211

Progress in the development of an electronic nose using arrays of chemically sensitive carbon black-polymer resistors. / Doleman, Brett J.; Severin, Erik J.; Sanner, Robert D.; Lewis, Nathan S.

Proceedings of SPIE - The International Society for Optical Engineering. Vol. 3392 1998. p. 390-400.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Doleman, BJ, Severin, EJ, Sanner, RD & Lewis, NS 1998, Progress in the development of an electronic nose using arrays of chemically sensitive carbon black-polymer resistors. in Proceedings of SPIE - The International Society for Optical Engineering. vol. 3392, pp. 390-400, Detection and Remediation Technologies for Mines and Minelike Targets III, Orlando, FL, United States, 4/13/98. https://doi.org/10.1117/12.324211
Doleman BJ, Severin EJ, Sanner RD, Lewis NS. Progress in the development of an electronic nose using arrays of chemically sensitive carbon black-polymer resistors. In Proceedings of SPIE - The International Society for Optical Engineering. Vol. 3392. 1998. p. 390-400 https://doi.org/10.1117/12.324211
Doleman, Brett J. ; Severin, Erik J. ; Sanner, Robert D. ; Lewis, Nathan S. / Progress in the development of an electronic nose using arrays of chemically sensitive carbon black-polymer resistors. Proceedings of SPIE - The International Society for Optical Engineering. Vol. 3392 1998. pp. 390-400
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