| 초록 |
Conductive and stretchable fibers have attracted great interest for their distinctive advantages as potential applications in implantable electronics. Among them, liquid metal-based fibers have been especially highlighted as promising active material candidates for strain-insensitive electronics. However, practical biomedical application of conventional liquid metal based fibers is limited due to the leakage of toxic materials and poor electrochemical property. Here, we present fully stretchable and highly conductive core-shell structured microfibers composed of liquid metal alloy as a core and Ag@Au nanowire composite as a shell. The microfiber retains superior electrical conductivity under strain and exhibits high stretchability as well as excellent stability. Since the core-shell structure prevents exposure of liquid metal, the microfibers exhibit good biocompatibility. Furthermore, the functionalization of microfibers, such as lower impedance, can be achieved by surface modification of nanocomposite, showing its potential for biosignal sensing and electrical stimulation. |
