Researchers have developed flexible thread-based electronic circuits that conform to the body, opening possibilities for comfortable wearable health monitors, smart clothing and medical sensing.
Tufts University researchers have developed a new class of thread-based electronic circuits that could pave the way for more comfortable wearable health monitors. Reported in ACS Applied Materials & Interfaces, the technology integrates transistors, sensors and other circuit elements into flexible threads that can be sewn into clothing or wrapped around curved body surfaces.
The free-form electronic threads are designed to bend, coil, stretch and move naturally with the body while maintaining their functionality. Unlike conventional rigid electronics, the circuits can conform closely to skin or textiles, enabling discreet devices capable of continuously monitoring health and environmental conditions. Researchers believe AI-driven analysis could convert the collected data into valuable insights for fitness, healthcare and recovery.
As a proof of concept, the team demonstrated wearable devices that amplified signals from sensitive sensors. One prototype was placed on the temple to detect blinking, while another monitored breathing patterns and respiratory rate near the diaphragm. The researchers suggest the platform could eventually support soft wearable systems for monitoring health, stress and other physiological conditions.
A key innovation is the use of an organic eutectogel, which bridges tiny gaps within the thread-based circuitry while remaining soft, stable and compatible with contact on or inside the body. The material also provides a limited self-repair capability, allowing damaged gel sections to regain their electrical and mechanical properties after gentle heating. Unlike hydrogel-based alternatives, the eutectogel is less prone to drying out.
The fabrication process also avoids the clean-room photolithography and high-temperature manufacturing commonly required for integrated circuits, potentially lowering production costs and improving compatibility with textile materials. Although the technology remains at an early stage, the researchers aim to enhance fabrication precision and expand the complexity of thread-based circuits, supporting future applications ranging from smart garments to wearable medical devices and implantable monitoring systems.
