Researchers Develop Conductive Ink for Wearable Biosensors

Scientists at Pennsylvania State University have created a conductive ink that can be applied directly to the skin in various designs, transforming into a functional electrode for biomonitoring once dried. This research was detailed in a paper published in the Proceedings of the National Academy of Sciences (PNAS). E-tattoos, which have been in development for over a decade, connect to the skin without adhesives and are nearly invisible. They allow for electrical and other measurements using thin polymers with embedded circuits. However, existing e-tattoos face challenges on curved or hairy surfaces and require custom electrode designs for larger areas. Recent advancements include polymer-based conductive inks that can be printed on the scalp for brain wave measurement, potentially enabling mobile EEG monitoring outside clinical environments.