A Skin‐Like Strain Sensor for Real‐Time Human Motion Detection

ABSTRACT With the rapid advancement of flexible health monitoring technologies, the development of strain sensors that simultaneously exhibit high stretchability, sensitivity, and stability like human skin has become increasingly crucial. However, conventional sensors often suffer from limited stretchability, breathability, and long‐term stability, rendering them insufficient for practical wearable applications. Meanwhile, emerging liquid metal composite materials face challenges such as complex processing and poor interfacial stability. To address these challenges, we developed a high‐performance strain sensor utilizing electrospinning in combination with a selective pressing process. This approach enables the controlled release of liquid metal within a porous nanofiber network and facilitates the formation of patterned conductive pathways. The obtained skin‐like sensor demonstrates a fracture elongation of 200%, excellent moisture permeability (WVTR: 2296 g/m 2 /day) and breathability (120 mm/s), good biocompatibility, and effective water resistance. Meanwhile, the sensor also demonstrates high linearity (R 2 > 0.99) over a strain range up to 100%, rapid response time (270 ms), and excellent cyclic stability. Experiments confirm that the sensor can accurately monitor human motions such as joint movements and gesture recognition. The straightforward fabrication process and well‐balanced performance of the skin‐like sensor offer a practical solution for wearable health monitoring and human‐computer interaction.