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Electronic Nose

Presentations | English

An electronic nose was designed using an array of silicon microcantilevers, where each cantilever was coated with various sensor layers such as metals, self-assembled monolayers, or polymers. The physisorption or chemisorption of analyte molecules on the microcantilevers lead to its deflection and/or a change in its resonance frequency. The microcantilever's deflection was read by an optical method. However, the readout of a large number of microcantilevers can only be done via multiplexing by switching on and off eight light sources at varied time intervals. The kinetics of the swelling process were related to the vapor pressure and the solubility characteristics of the analyte in the polymers, while the effects related to heat transfer or mass change could be used for analyte detection . Thus, the exposure of “electronic nose” to a gaseous analyte mixture results in the individual electronic response from each microcantilever in the array. Of interest is the demonstration of an electronic nose for the characterization and identification of gaseous analytes, such as primary alcohols, natural flavors, and water vapor.

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Lumens

8.25

Lumens

PPTX (33 Slides)

Electronic Nose

Presentations | English