| 초록 |
A bio-inspired design of hierarchical micro- and nanostructured ZnO nanowire (NW) arrays in an interlocked geometry is suggested for ultra-sensitive electronic skins (e-skins). We show that the interlocked hierarchical structures enable a sensitive variation in the contact area between the interlocked ZnO NWs and also the efficient bending of ZnO NWs, which allow the sensitive detection of both static and dynamic tactile stimuli through piezoresistive and piezoelectric transductions, respectively. The hierarchically structured e-skins show a high pressure sensitivity (-6.8 kPa-1) and an ultra-fast response time (＜5 ms). We demonstrate that our interlocked and hierarchical design can be applied to perceive the dynamic stimuli of high frequency vibration. The suggested design of our e-skins, which allows the simultaneous perceptions of static and dynamic tactile stimuli, may find applications in robotic hands for dexterous manipulations and various healthcare monitoring devices. |
