New paint-on health sensors are as fun as face paint

Engineers at Penn State University filed a provisional patent for colorful, customizable wearable electrodes that can be painted directly onto skin using conductive ink. The sensors monitor heart rate, brain activity (EEG), and muscle activity (EMG) with improved adhesion and sensitivity compared to rigid metal-based electrodes, using materials that bond better to skin and remain effective on hairy or sweaty skin. Study published in PNAS.