| 초록 |
Arachnids are among the most sensitive creatures on the Earth. Especially, their mechano-sensory system embedded in the crack-shaped slit organ made of stiff exoskeleton over a cuticular pad near leg joints is known to sense a tiny variation of mechanical stress, thereby, serve as a ultra-sensitive vibration sensor. In this talk, we present spider inspired sensors based on nanoscale crack junctions can attain ultrahigh strain sensitivity that can serve as a multifunctional sensor for a vibration and pressure sensing. The results we achieved show the controllable sensitivity on demand (up to 15,000 gauge factor at 2% strain) and in vibration (~10 nm amplitude detection). The device fabricated on a sheet of plastic is reproducible, mechanically flexible and shape-deformable so that they can be easily mounted on human skin as skin electronic with multi-pixel arrays. We also show that the sensory system is applicable for highly selective speech pattern recognition even in noisy environment (~82 dB). The spider inspired sensory system would provide versatile novel applications utilizing ultra-high sensitivity on displacements. |
