| 초록 |
Skin electronics require a stretchable conductor whose resistance is invariable under repetitive skin deformations. However, obtaining such a strain-insensitive electrode with high conductivity is challenging because those two properties have been considered mutually exclusive. Here we report on the highly conductive and strain-insensitive nanocomposite enabled by adaptive organization of nanomaterials. The nanocomposite is composed of multi-dimensional surface-modified silver nanomaterials and block copolymer elastomers. The surface modification of nanomaterials with 1-alkanethiols enables them to have mobility in viscoelastic matrix. The movable nanomaterials can be organized in the ordered form along various strain conditions. The organization of silver nanomaterials can stably maintain percolation networks, minimizing resistance change of nanocomposite. When multi-dimensional nanomaterials are mixed in an appropriate combination, the nanocomposite exhibits the negligible resistance variation (< 1% under 1000 cycles of 50% strain) under various strain conditions while attaining high conductivity of ~30,000 S/cm. |
