Bilayer hydrogel strain sensor

Sensitive to subtle strains

Designed for subtle gestures and muscle activity in elderly users, with a coating-gel synergy enabling reliable sensing over a wide range.

Xiaoyan, Wang · Lim, Eng Gee · Yinchao, Zhao · Hoettges, Kai F. · Lu, Qifeng · Song, Pengfei

ACS Applied Materials & Interfaces 2026

Advantages

Gauge factor exceeds 7.54 at 5% strain

Machine learning based muscle activity monitoring achieves 100% accuracy in gesture recognition