Stretchable sensor tracks body signals without breaking
A new material can measure electrochemical signals from living tissue while stretching with the skin or muscle beneath it. That solves a long-standing problem for wearable and implantable health sensors.
Conventional sensors are made from rigid materials. Skin and muscle move and stretch constantly. That mismatch in stiffness creates mechanical stress at the sensor-tissue boundary, reducing measurement accuracy and eventually damaging the device. It has been a bottleneck in continuous biological monitoring for decades.
The researchers developed a bio-interface that is intrinsically stretchable, meaning that stretchability is a built-in property of the material itself rather than something engineered in through special structures. The electrochemical properties needed to measure substances like glucose or electrolytes remain intact even after repeated stretching.
What this enables
Continuous monitoring of metabolic markers is central to personalised health care and longevity research. Glucose, lactate, and electrolytes are indicators of metabolic health, muscle function, and hydration. Until now, reliable measurements required laboratory settings or uncomfortable wearable devices.
A reliably stretchable sensor could be incorporated into clothing, skin patches, or implantable devices. That makes long-term continuous monitoring possible without the user noticing the device.
Relevance for aging populations
For older adults, continuous monitoring is especially relevant. Metabolic values fluctuate more unpredictably with age. Early signals of irregularities, such as shifting blood sugar or altered electrolyte balance, are difficult to capture outside clinical settings with current tools. A stretchable sensor that moves with the body around the clock could change that.
The material is still at the research stage. But achieving both electrochemical performance and mechanical flexibility in a single material crosses a technical barrier that had not previously been cleared.