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Printable and Stretchable Giant Magnetoresistive Sensors for Highly Compliant and Skin‐Conformal Electronics
Author(s) -
Ha Minjeong,
Cañón Bermúdez Gilbert Santiago,
Kosub Tobias,
Mönch Ingolf,
Zabila Yevhen,
Oliveros Mata Eduardo Sergio,
Illing Rico,
Wang Yakun,
Fassbender Jürgen,
Makarov Denys
Publication year - 2021
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.202005521
Subject(s) - materials science , stretchable electronics , electronics , flexible electronics , 3d printed , printed electronics , elastomer , electronic skin , conformable matrix , conformal coating , nanotechnology , magnetoresistance , wearable technology , optoelectronics , electrical engineering , composite material , coating , inkwell , magnetic field , computer science , wearable computer , biomedical engineering , medicine , physics , engineering , quantum mechanics , embedded system
Highly compliant electronics, naturally conforming to human skin, represent a paradigm shift in the interplay with the surroundings. Solution‐processable printing technologies are yet to be developed to comply with requirements to mechanical conformability of on‐skin appliances. Here, it is demonstrated that high‐performance spintronic elements can be printed on ultrathin 3 µm thick polymeric foils enabling the mechanically imperceptible printed magnetoelectronics, which can adapt to the periodic buckling surface to be biaxially stretched over 100%. They constitute the first example of printed and stretchable giant magnetoresistive 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. The key enabler of this performance enhancement is the use of elastomeric triblock copolymers as a binder for the magnetosensitive paste. Even when bent to a radius of 16 µm, the sensors printed on ultrathin foils remain intact and possess unmatched sensitivity for printed magnetoelectronics of 3 T ‐1 in a low magnetic field of 0.88 mT. The compliant printed sensors can be used as components of on‐skin interactive electronics as it is demonstrated with a touchless control of virtual objects including zooming in and out of interactive maps and scrolling through electronic documents.