Designs drawn on the skin using this ‘electronic tattoo ink’ made of liquid metal and carbon nanotubes can help monitor heart rates and other vital health signs, according to South Korean researchers
Researchers at the Korea Advanced Institute of Science and Technology in the city of Daejeon southwest of Seoul have developed an electronic tattoo ink made of liquid metal and carbon nanotubes that functions as a bioelectrode.
Hooked up to an electrocardiogram device or other biosensor, it can send a readout of a patient's heart rate and other vital signs such glucose and lactate to a monitor.The researchers eventually aim to be able to dispense with biosensors. "In the future, what we hope to do is connect a wireless chip integrated with this ink, so that we can communicate, or we can send signal back and forth between our body to an external device," said project leader Steve Park, a materials science and engineering professor.The ink is non-invasive and made from particles based on gallium, a soft, silvery metal also used in semiconductors or in thermometers.
"When it is applied to the skin, even with rubbing the tattoo doesn't come off, which is not possible with just liquid metal," Park said.Reporting by Minwoo Park, Daewoung Kim; editing by John Stonestreet
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