| 초록 |
The development of electronic skins (e-skins) is important in the fields of wearable electronics, robotics, and Internet of Things. Human skin has excellent tactile sensitivity due to gradient stiffness between stiff epidermis and soft dermis with interlocked microridges which induces effective stress transmission to mechanoreceptors. Inspired by skin, we developed the interlocked microridge-structured polymers with gradient elastic modulus and further introduced the hierarchical nanopores. This design enhances the contact areal change by effective stress transmission from stiff to soft layers, resulting in highly sensitive triboelectric e-skins. Also, we proposed the bio-inspired and hierarchical ZnO nanowires (NWs) in an interlocked geometry. The interlocked and hierarchical ZnO NWs enable stress-sensitive variation in the contact area, which allow the sensitive detection of both static and dynamic tactile stimuli through piezoresistive and piezoelectric transduction, respectively. |
