SECOND SKIN

Scientists at the University of Groningen have developed a new kind of wearable and flexible sensor, which can mimic the sensory capabilities of skin itself.

The sensors are made from flexible polymers and bundles of carbon fibre, which are ‘piezoresistive’: their conductivity changes when they’re stretched. That enables them to be used to monitor any changes in pressure, touch and gait, as well as any muscle tremors and different movement patterns.

“This is a unique combination,” explains Dr Ajay Kottapalli of the University of Groningen. “Our sensors have a skin-like function.” Many athletes already wear kit fitted with electrodes that can measure speed and distances, but they have limited flexibility and function. “Our sensors would add body movement to this, which is an entirely different approach,” adds Professor Kottapalli. “Apart from joint movement, we could also register breathing movements.”

The researchers believe the sensors could be built into sports kit, applied as wearable patches on joints, or even used to help people with Parkinson’s disease.