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Printable polythiophene gas sensor array for low-cost electronic noses

J. Appl. Phys. 100, 014506 (2006); doi:10.1063/1.2208743

Published 12 July 2006

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Josephine B. Chang, Vincent Liu, and Vivek Subramanian
Department of Electrical Engineering and Computer Sciences, University of California, Berkeley 144 MB Cory Hall, Berkeley, California 94720

Kevin Sivula, Christine Luscombe, Amanda Murphy, Jinsong Liu, and Jean M. J. Fréchet
Department of Chemistry, University of California, Berkeley and the Material Science Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720
A route for generating arrays of printable polythiophene-based gas sensor materials suitable for low-cost manufacturing is demonstrated. Materials with complementary sensor responses are synthesized by incorporating functional groups into the molecule, either along the polymer backbone or as end-capping groups. Using these materials as printable sensor inks, a functional, integrated gas sensor array chip is fabricated using additive deposition techniques. The sensor array shows sensitivity to a range of volatile organic compounds down to concentrations of 10  ppm. A three-terminal thin film transistor structure is used, allowing the extraction of multiple parameters that help to elucidate the mechanisms responsible for sensor response and the role of the functional groups in this response. ©2006 American Institute of Physics
History: Received 13 January 2006; accepted 17 April 2006; published 12 July 2006
Permalink: http://link.aip.org/link/?JAPIAU/100/014506/1
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KEYWORDS and PACS

Keywords
PACS
  • 07.07.Df
    Sensors (chemical, optical, electrical, movement, gas, etc.); remote sensing
  • 82.80.-d
    Chemical analysis and related physical methods of analysis
  • 81.05.Lg
    Polymers and plastics; rubber; synthetic and natural fibers; organometallic and organic materials: fabrication, treatment, testing and analysis
  • YEAR: 2006

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PUBLICATION DATA

ISSN:
0021-8979 (print)   1089-7550 (online)
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