Printable Giant Magnetoresistive Sensors for Highly Compliant On-Skin Electronics


Printable Giant Magnetoresistive Sensors for Highly Compliant On-Skin Electronics

Ha, M.; Canon Bermudez, G. S.; Kosub, T.; Zabila, Y.; Oliveros Mata, E. S.; Illing, R.; Faßbender, J.; Makarov, D.

Magnetic field sensors, which can perceive environmental changes with respect to altered magnetic fields, enable proximity sensing ranging from touchless human-machine interaction to noninvasive medical diagnostics. In this regard, magnetic field sensors should be aimed toward perfect mounting on the curved human body and uneven organs without any mechanical constraints, at the same time, pursuing high sensitivity in low magnetic fields at 1 mT for the practical use of wearable electronics to the general public. Here, we demonstrate that high performance giant magnetoresistive (GMR) sensors can be printed on ultrathin 3-µm-thick polymeric foils enabling the mechanically imperceptible magnetoelectronics. Thanks to their excellent compliancy, the printed GMR sensors well adapt to the periodic buckling surface. They constitute the first example of printed GMR sensors, revealing 2 orders of magnitude improvements in mechanical stability and sensitivity at small magnetic fields, compared to the state-of-the-art printed magnetoelectronics [1]. Even when bent to a radius of 16 µm, the sensors screen printed on ultrathin foils remain fully intact and possess high sensitivity of 3 /T in a low magnetic field of 0.88 mT. With this performance, the compliant GMR sensors can be used as components of on-skin interactive electronics as we demonstrate with a touchless control of virtual objects including zooming in and out of interactive maps and scrolling through electronic documents.
[1] Meyer, J., Rempel, T., Schäfers, M., Wittbracht, F., Müller, C., Patel, A., Hütten, A., Smart Mater. Struct. 22 (2013) 025032-025037.

  • Lecture (Conference)
    6th International Conference on Advances in Functional Materials, 15.-17.02.2021, Jeju Island, South Korea

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Publ.-Id: 32310