HKUST and CityU collaborate to develop new liquid metal conductive ink

A research team from the Hong Kong University of Science and Technology (HKUST) and the City University of Hong Kong (CityU) has jointly developed a water-based liquid metal conductive ink called SE-tattoo, which aims to solve the problem of preparing dry electrodes on hairy skin. This conductive ink is composed of water-based polyurethane, silver flakes and gallium-indium alloy liquid metal, which can evaporate quickly within 20 seconds to form a conductive tattoo. SE-tattoo fits tightly to the skin, conforming to the skin texture structure while maintaining good breathability. In addition, SE-tattoo has no effect on hair, which improves wearing comfort.