Discipline: Technology and Engineering
Subcategory: Chemical/Bimolecular/Process Engineering
Room: Exhibit Hall
Ogheneobarome Emeje - University of Missouri-Columbia
Co-Author(s): Ganggang Zhao, Zheng Yan
Soft elastomers that are conformally and intimately in contact with human skin are essential for wearable sweat sensors, which can provide noninvasive, continuous, real-time, and reliable health monitoring. The construction of sweat sensors requires to fabricate conductive electrodes on soft elastomers. Current technologies, including spray coating, ink printing, and photolithography are mostly dependent on the transfer of prepared conductive materials to soft substrates, and the scheme to in-site produce conductive materials on soft elastomer is lacking. Here, we present an approach of convenient, in-site, and high-resolution manufacturing metallic conductive MoO2 on porous SEBS by direct laser scribing. By following electrode modifications and functionalization, we fabricated sweat sensors, for the concentration track of biomarkers including glucose, caffeine (CAF), and uric acid (UA) in sweat with excellent performances. The results confirmed that glucose concentrations’ response current sensitivity was ~15.7 nA μM−1. These findings conclude the LSM-based glucose sensor exhibits high repeatability, long-term stability, and high selectivity. Additionally, we found that UA and CAF can be detected by electrochemical oxidation under specific potentials (UA, ~0.15 V; CAF, ~1.11 V) on LMS electrodes using differential pulse voltammetry methods that presented high sensitivity, repeatability, stability, and selectivity. The studies illustrate that wearable sweat sensors can be used in health monitoring.
Funder Acknowledgement(s): The project described was supported by funding from MU’s MARC Fellows Program via grant number T34 GM 136493 from the National Institute of General Medical Science (NIGMS), a component of the National Institutes of Health (NIH).
Faculty Advisor: Zheng Yan, firstname.lastname@example.org
Role: The main portion of this research I contributed by testing and collecting data.