A Thin Film Wireless Passive Multiplexed Wearable Biomarker Sensor

Ruitong Chen, Ellis Meng

Confirmation: I have read and agree with the IEEE BSN 2025 conference submission's policy on behalf of myself and my co-authors.

Keywords: Electrochemical sensors, multiplexed sensing, wireless sensing, passive sensing, wearable device

Abstract: Electrochemical sensor-integrated wearable devices can noninvasively monitor biomarkers present in sweat and interstitial fluid to provide insights on physiological health status. Current approaches often require rigid electrical components for signal processing and data transmission, which can negatively impact wearability. Passive sensing formats to eliminate rigid, discrete electronics have been explored but are largely limited to single marker detection. We investigate an alternative passive multiplexed sensing paradigm in which an entire system can be constructed in a thin, flexible film using polymer microfabrication techniques. Cortisol and sodium were selected as model molecules for the purpose of demonstrating wireless biomarker measurement using this system based on the principle of reflected impedance. Presence of each triggers changes in different circuit components of the secondary side equivalent, further demonstrating that sensing via different modes is possible using this a proof-of-concept multiplexed biomarker sensor constructed entirely on a flexible and biocompatible thin film.

Track: 5. Conformable decoders, unintrusive, comfortable, self-powered sensors and systems

NominateReviewer: Ruitong Chen, [e-mail]

Submission Number: 12