Biocompatible Polymer Sensors Eliminate Adhesives and Gels for Comfortable Long-Term Electrocardiogram Monitoring

NC State researchers develop skin-conforming polymer electrodes for ECG monitoring. Learn how these gel-free, adhesive-free sensors improve heart health tracking.

By: AXL Media

Published: Apr 21, 2026, 4:45 AM EDT

Source: Information for this report was sourced from North Carolina State University

The Search for Non-Invasive Cardiac Monitoring

Long-term electrocardiogram (ECG) monitoring is a vital diagnostic tool for heart disease and recovery tracking, yet the current gold-standard technology remains physically burdensome for many patients. Traditional electrodes require chemical gels to facilitate signal conduction and strong adhesives to remain in place, often leading to skin irritation and degraded signal quality as the gel dries over several days. To address these limitations, a research team led by Kirstie Queener at North Carolina State University has engineered a self-adhesive, conductive elastomer that maintains a clear signal through movement without the need for supplementary wet agents.

Engineering a Conductive Polymer Matrix

The foundation of this breakthrough is a biocompatible polymer known as POMaC. While POMaC possesses the necessary mechanical elasticity to mimic human skin, it is naturally non-conductive. The researchers overcame this by incorporating a specific conductive polymer and a surfactant into the liquid POMaC mixture. This hybrid material can be shaped through casting or screen printing before being cured into a flexible solid. The resulting matrix acts as a functional electrode that is naturally "tacky" enough to stick to the skin but gentle enough to be removed without causing trauma or hair loss.

Performance Validation and Versatility

In proof-of-concept trials, the skin-conforming electrodes were tested alongside both standard commercial ECG machines and next-generation wireless patches. Results published in Advanced Electronic Materials indicate that the polymer sensors provide readings comparable in accuracy to traditional silver/silver chloride electrodes. Corresponding author Michael Daniele noted that the material’s ability to bear the weight of transmission wires while maintaining contact during patient movement underscores its potential for both clinical settings and home-based recovery monitoring.