| 초록 |
Electronic skins (e-skins) with high sensitivity in response to multidirectional mechanical stimuli are crucial for healthcare monitoring devices, robotics and wearable devices. While various types of microstructured e-skins have been reported to improve the force sensitivity, the underlying relationship between the different microstructure geometry and force sensing capability remains elusive. Here, we fabricate piezoresistive e-skins based on interlocked composite films with different microstructure geometries (dome, pyramid, pillar). Depending on the geometry of microstructure arrays, distinct variations in contact area and localized stress distribution are observed under different mechanical forces including normal, shear, stretch and bending, response/relaxation time, and mechanical durability of e-skins. As proof of concept applications, we demonstrate wearable healthcare devices based on our e-skins by monitoring acoustic wave, air flow, and human artery/carotid pulse pressures. |
