The development of wearable breath or sweat sensors for human performance monitoring is increasingly important for providing personalized health information under various environmental conditions. A major challenge is the lack of sensing elements responsive uniquely to moisture-dominated breathing and sweating environment, which is critical for differentiating various chemical or biological species from the moisture-dominated environment. This report describes a novel chemiresistors printed on nanofibrous paper and decorated with functional nanoparticles that exhibit structurally-tunable and signal-regulatable responses to human breathing and sweating. Interdigitated microelectrodes were printed on multi-layered nanofibrous membrane-type paper using aerosol jet printer with metal/alloy nanoparticles or nanowires, and carbon nanomaterials. Testing of the sensor performance in the breath and sweat monitoring has demonstrated an enhancement in sensitivity in comparison with sensors fabricated with conventional substrates. Implications of the findings for the design and manufacturing of a fully-printable, highly-sensitive, and wearable breath or sweat sensors will also be discussed.

Biosenors printed on paper and embedded with functional nanoparticle assemblies for human performance monitoring

256th National Meeting (2018)

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