| 초록 |
Gallium-based liquid metal is an appealing conductor for use in electronic circuits and soft electronic devices due to its metallic conductivity and fluidic properties at room temperature. The mixing liquid metal (LM) with iron particles can form conductive and magnetic responsive fluidic composites, i.e., liquid metal ferrofluid (LMFF). In this work, we fabricated stretchable and elastic hollow fiber using silicone by a spin-roller coating. Then, we injected alternatively the LM and the LMFF wire into the core of the fiber. The fluidic LM-LMFF wire can allow the fiber preserve elastic property and the bimetallic core (LMFF wire) can allow the fiber to locally actuate by applying an external magnetic field. The LM stays in a super-cooling liquid state, but it can initiate solidification by providing a seed crystal and propagating along with the fiber. By utilizing these features, we demonstrate variable stiffness and locally actuating stretchable fiber by applying magnetic field. |
