Stretchable Liquid Metal Composite Films with Hand-Written Conductive Trace and Directionally Anisotropic Metallic Conductivity
발표자
()
초록
내용
We describe stretchable liquid metal (LM) composite films by mixing elastic polymer with the LM fillers. By shear mixing, the LM can break into small droplets in the composites. Once the composites are cured, the composite films are non-conductive due to the oxide layer spontaneously formed on the surface of the LM droplets. To restore electrical conductivity, the LM droplets are sintered by localizing mechanical pressure onto the composite films, resulting in rupturing the oxide layer and creating the conductive trace. The metallic conductivity of the trace can be maintained up to 600% strain due to fludic behavior of the liquid metal. In addition, the LM composite films show the directionally anisotropic electrical conductivity upon applying strains with parallel- and perpendicular direction along the conductive trace. This stretchable LM composite film with the anisotropic metalic conductive can be used in flexible electrical devices, and soft robotics.