Self-healable printed magnetic field sensors using alternating magnetic fields

Rui Xu (), Gilbert Santiago Cañón Bermúdez, Oleksandr V. Pylypovskyi, Oleksii M. Volkov, Eduardo Sergio Oliveros Mata, Yevhen Zabila, Rico Illing, Pavlo Makushko, Pavel Milkin, Leonid Ionov, Jürgen Fassbender and Denys Makarov ()
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Rui Xu: Institute of Ion Beam Physics and Materials Research
Gilbert Santiago Cañón Bermúdez: Institute of Ion Beam Physics and Materials Research
Oleksandr V. Pylypovskyi: Institute of Ion Beam Physics and Materials Research
Oleksii M. Volkov: Institute of Ion Beam Physics and Materials Research
Eduardo Sergio Oliveros Mata: Institute of Ion Beam Physics and Materials Research
Yevhen Zabila: Institute of Ion Beam Physics and Materials Research
Rico Illing: Institute of Ion Beam Physics and Materials Research
Pavlo Makushko: Institute of Ion Beam Physics and Materials Research
Pavel Milkin: University of Bayreuth
Leonid Ionov: University of Bayreuth
Jürgen Fassbender: Institute of Ion Beam Physics and Materials Research
Denys Makarov: Institute of Ion Beam Physics and Materials Research

Nature Communications, 2022, vol. 13, issue 1, 1-11

Abstract: Abstract We employ alternating magnetic fields (AMF) to drive magnetic fillers actively and guide the formation and self-healing of percolation networks. Relying on AMF, we fabricate printable magnetoresistive sensors revealing an enhancement in sensitivity and figure of merit of more than one and two orders of magnitude relative to previous reports. These sensors display low noise, high resolution, and are readily processable using various printing techniques that can be applied to different substrates. The AMF-mediated self-healing has six characteristics: 100% performance recovery; repeatable healing over multiple cycles; room-temperature operation; healing in seconds; no need for manual reassembly; humidity insensitivity. It is found that the above advantages arise from the AMF-induced attraction of magnetic microparticles and the determinative oscillation that work synergistically to improve the quantity and quality of filler contacts. By virtue of these advantages, the AMF-mediated sensors are used in safety application, medical therapy, and human-machine interfaces for augmented reality.

Date: 2022
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DOI: 10.1038/s41467-022-34235-3

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