Stretchable sensors

The Fraunhofer-developed sensors work in a similar way to conventional strain gauges - measuring the change in electrical capacitance as the sensor is stretched - but they are made of a highly stretchable elastomeric polymer film that is coated on both sides with flexible electrodes. By controlling the degree of chemical bonding within the elastomer film, the researchers are also able to tailor the sensors for specific applications.

"If the sensor is being used to measure high pressures, we produce a sturdier elastomer film as substrate; for measuring lower pressures, we use more pliant films," says Dr. Holger Böse, Scientific and Technical Manager of the ISC's Center Smart Materials.

Source: gizmag.comAdded: 31 May 2011