Liquid Metal for Soft-Hard Interface in Stretchable Electronics

The complete stretchable electrode device includes stretchable electrode material and rigid data processing module. However, due to the mismatched modulus of the two parts, the stability of the soft-hard interface is unsatisfying, which in turn limits the signal transmission quality. Here, we introduce liquid metal into the circuit and use the fluidity of liquid metal as a contact material for the soft and hard interface. The interface shows good stability under both direct current (DC) and alternating current (AC) during stretching, which provides a reference for the soft and hard interface of flexible materials.