Liquid Metal coated magnetic particles toward writable and non-wettable stretchable circuit boards
발표자
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초록
내용
Liquid metal is a compelling conductor to produce soft and stretchable devices by electrically connecting and mechanically supporting electronic components. Although the liquid metal has been widely used for electronics, magnetic liquid metal is appealing because it can be used for self-healable electronics and actuators by external magnetic fields. In this work, mixing ferromagnetic iron particles into the liquid metal (gallium) can be rendered into conductive and magnetically responsive core(iron)–shell(gallium) particles by sonication. The surface topography of the particles can be manipulated by forming GaOOH crystals by sonication depending on solvent, resulting in non-wettable circuit with hierarchical surface topography when the particles are cast. The liquid metal shell is extremely soft and conductive, hand-writing method or applying external magnetic fields can make conductive traces by sintering the particles, resulting in the soft and stretchable circuit boards.