Berlin 2015 – scientific programme

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MM: Fachverband Metall- und Materialphysik

MM 16: Functional materials III: Sensors and Actuators

MM 16.4: Talk

Monday, March 16, 2015, 16:30–16:45, TC 010

Wearable magnetic field sensors for flexible electronics — •Gilbert Santiago Cañon Bermudez, Daniil Karnaushenko, Michael Melzer, Ingolf Mönch, Denys Makarov, and Oliver G. Schmidt — Institute for Integrative Nanosciences, IFW Dresden, Dresden, Germany

The recent rapid advance and eagerness of portable consumer electronics stimulate the development of functional elements towards being lightweight, flexible, and even wearable[1]. Next generation flexible appliances aim to become fully autonomous and will require ultra-thin and flexible navigation modules, body tracking and relative position monitoring systems which frequently rely on Hall effect sensors. Unfortunately, conventional semiconductor-based Hall sensors are about 400 um thick and rigid, limiting their direct applicability in flexible electronics. To overcome this limitation of conventional technologies, we introduce a novel platform relying on the smart combination of inorganic Bismuth nanomembranes and polymeric foils, which allow us to fabricate highly flexible Hall effect sensorics[2]. Our experiments demonstrate that these flexible devices can be reliably bent or wrapped around the wrist to realize interactive devices for wearable electronics. Alternatively, thin and bendable Hall sensors are of great interest for the rapidly developing market of eMobility, where the performance of eMotor designs could be greatly enhanced.

[1] J. A. Rogers et al., Nature 2011, 477, 45.

[2] M. Melzer et al., Adv. Mat. (2014) in press.