Tufts Researchers Embed Health-Monitoring Circuits Directly Into Clothing Thread

Scientists at Tufts University have developed a method to build fully functional analog circuits onto single strands of coated thread, enabling health monitoring without wearable devices. The thread incorporates transistors, resistors, sensors, and amplifiers, allowing it to bend, stretch, and twist while remaining operational. In demonstrations, thread placed near the temple detected eye blinking, while thread near the diaphragm accurately tracked breathing patterns and respiration rate. A key material called eutectogel serves as the transistor's gate dielectric and, unlike conventional hydrogels, resists drying out and can partially self-heal when rejoined with gentle heat. The technology could pave the way for everyday garments that passively monitor health metrics without any rigid electronics or external charging.