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Abstract: An electronic
nose formed from a heterogeneous array of chemiresistors is presented. The sensor is
fabricated in a novel, CMOS-compatible process by the sequential, dielectrophoretic
assembly of a diverse set of chemiresistive nanomaterials (reduced graphene oxide,
carbon nanotubes, and copper oxide nanowires) onto a silicon chip. Fabrication of the
substrate and nanomaterials is ... read moredetailed, as well is the process of sequential
dielectrophoretic assembly to integrate the nanomaterials and substrate. Individually,
the sensors show a high degree of sensitivity, demonstrating fractional changes of
resistance of greater than 50% upon exposure to gas vapors. The entire chip with the
ensemble of chemiresistors is shown to be an effective electronic nose, with
distinguishable responses to ammonia, methanol, and
toluene.
Thesis (M.S.)--Tufts University,
2013.
Submitted to the Dept. of Electrical
Engineering.
Advisor: Sameer
Sonkusale.
Committee: Tom Vandervelde, and Mehmet
Dokmeci.
Keyword: Electrical
engineering.read less
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