A Stretchable Argentum/Polyurethance Fiber Strain Sensor for Wearable Sensing Devices

The field of wearable electronic devices is rapidly expanding, with a wide range of applications such as personalized health monitoring, soft robots, and human motion detection. To create textile-based electronic devices, it is essential to study electronic devices that are based on fibers. This study presents a simple and controllable process for creating a new stretchable fiber strain sensor using silver and polyurethane. The newly developed fiber strain sensors have several benefits, including a low initial electrical resistance of 10 Ω/cm, a wide range of strain sensing, high sensitivity, and high stability against repeated stretching and releasing in only one-process adsorption and reduction. The adsorption of continuous silver particles on the fiber surface is demonstrated using electric resistance variances, micro-images, and thermogravimetric analysis. These results provide valuable insights into the development of wearable applications for the next generation.