The goal of our research is to provide a low cost, efficient, non-invasive, point-of-care screening method to diagnose lung diseases at an early stage. We have prepared a number of organic polymers mixed with varied concentrations of conductive carbon nanoparticles and deposited the mixture between the microcapacitor plates of our microsensors using ink-jet technology.  We have also fabricated sensors using conducting ionic liquids. The response magnitude for each sensor depends on a numerous phenomenon but changes in permittivity of the analyte and polymer swelling dominate. The performance of individual chemicapacitive sensors were characterized through exposure to different concentrations of varied breath biomarkers (volatile organic compounds) at different temperatures and humidity levels in a vapor delivery system. Performances of different coatings were also characterized using a coated quartz crystal microbalance. Stability, selectivity and limits of detection will be presented.

Conducting liquids and polymer nanocomposite chemcapacitive microsensors for breath biomarker detection

245th National Meeting (2013)

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