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Selective Detection of Ethylene Gas Using Carbon Nanotube-based Devices: Utility in Determination of Fruit Ripeness

Authors

  • Dr. Birgit Esser,

    1. Department of Chemistry and Institute for Soldier Nanotechnologies, Massachusetts Institute of Technology, Cambridge, MA 02139 (USA)
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  • Jan M. Schnorr,

    1. Department of Chemistry and Institute for Soldier Nanotechnologies, Massachusetts Institute of Technology, Cambridge, MA 02139 (USA)
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  • Prof. Dr. Timothy M. Swager

    Corresponding author
    1. Department of Chemistry and Institute for Soldier Nanotechnologies, Massachusetts Institute of Technology, Cambridge, MA 02139 (USA)
    • Department of Chemistry and Institute for Soldier Nanotechnologies, Massachusetts Institute of Technology, Cambridge, MA 02139 (USA)
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  • This research was supported (in part) by the U.S. Army Research Office under contract W911NF-07-D-0004. B.E. is grateful to the German Academy of Sciences Leopoldina for a postdoctoral fellowship (LPDS 2009-8). We thank S. L. Buchwald for the usage of computational resources, J. J. Walish for fabricating the device holder, and J. G. Weis for SEM measurements.

Abstract

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Comparing apples and oranges: A chemoresistive sensor for ethylene can be obtained simply by mixing copper complex 1 with single-walled carbon nanotubes. The resulting devices show sub-ppm sensitivity and high selectivity towards ethylene. The utility of the sensor was demonstrated by following ripening stages in different fruits.

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