Researchers at Penn State have developed a flexible, skin-like sensor that can monitor both physical movement and electrical signals—internally and externally. Designed to mimic the properties of human skin, the device combines electrical and ionic conductivity, allowing it to interface naturally with the body, even in wet environments like internal organs. Unlike conventional sensors that rely solely on electron flow, this dual-modal approach improves signal quality and adhesion, especially for implanted applications.
The sensor is built from a mix of flower-shaped metal-organic frameworks, carbon nanotubes, and a soft rubber-like material infused with ionic liquid. This combination gives it high sensitivity, stretchability, and long-term durability. It can detect large motions like wrist bends and subtle ones like muscle twitches, while also recording electrical activity such as heartbeats and brain waves. In tests, it performed as well or better than commercial sensors across a range of metrics.
One standout application is bladder monitoring. In rodent models, the sensor tracked both bladder stretching and muscle electrical activity, suggesting future use in diagnosing and treating bladder control issues. Because it works in both dry and wet conditions, the same sensor can be used on the skin or implanted—no need for separate designs.
Article from Penn State: Skin-like sensor monitors internal, external body movement, electrical signals
Abstract in Advanced Functional Materials: Bioinspired Durable Mechanical-Bioelectrical Dual-Modal Sensors Enabled by Mixed Ion-Electron Conduction and Mechanical Interlocking for Multifunctional Sensing
