Self-Adhesive, Self-Healing, and Water-Soluble Polymeric Dry Electrodes for Robust Physiological Signal Monitoring

Dry electrodes are vital tools for monitoring physiological signals in various applications. However, conventional dry electrodes encounter various limitations such as insufficient adhesion, poor antidisturbance, and discomfort in wearable electronics. In response to these challenges, this study introduces a polymeric dry electrode with excellent stretchability and low modulus to ensure comfort during signal acquisition. Furthermore, it features a low skin interface impedance, robust adhesion, and self-healing capabilities, ensuring reliable electrophysiological signal collection. The performance of the electrode can be rapidly restored with a self-healing capability when damaged in operation, and it can be broken into fragments when submerged in water after use due to its good solubility. Owing to the low interface impedance, good adhesion, self-healing capability, and water solubility, this dry electrode demonstrates significant advantages in high-quality and comfortable monitoring electrooculograms (EOG), electrocardiograms (ECG), and electromyograms (EMG). It shows the potential to provide reliable technical support for health monitoring and medical diagnosis while also reducing environmental impact.