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Wireless, battery-free, and real-time monitoring of water permeation across thin-film encapsulation

Author

Listed:
  • Massimo Mariello

    (École Polytechnique Fédérale de Lausanne
    École Polytechnique Fédérale de Lausanne (EPFL)
    University of Oxford)

  • James Daniel Rosenthal

    (École Polytechnique Fédérale de Lausanne)

  • Francesco Cecchetti

    (École Polytechnique Fédérale de Lausanne (EPFL))

  • Mingxiang Gao

    (École Polytechnique Fédérale de Lausanne (EPFL))

  • Anja K. Skrivervik

    (École Polytechnique Fédérale de Lausanne (EPFL))

  • Yves Leterrier

    (École Polytechnique Fédérale de Lausanne (EPFL))

  • Stéphanie P. Lacour

    (École Polytechnique Fédérale de Lausanne)

Abstract

Long-term bioelectronic implants require stable, hermetic encapsulation. Water and ion ingress are challenging to quantify, especially in miniaturized microsystems and over time. We propose a wireless and battery-free flexible platform leveraging backscatter communication and magnesium (Mg)-based microsensors. Water permeation through the encapsulation induces corrosion of the Mg resistive sensor thereby shifting the oscillation frequency of the sensing circuit. Experimental in vitro and in-tissue characterization provides information on the operation of the platform and demonstrates the robustness and accuracy of this promising method, revealing its significance for in-situ real-time monitoring of implanted bioelectronics.

Suggested Citation

  • Massimo Mariello & James Daniel Rosenthal & Francesco Cecchetti & Mingxiang Gao & Anja K. Skrivervik & Yves Leterrier & Stéphanie P. Lacour, 2024. "Wireless, battery-free, and real-time monitoring of water permeation across thin-film encapsulation," Nature Communications, Nature, vol. 15(1), pages 1-14, December.
    • Handle: RePEc:nat:natcom:v:15:y:2024:i:1:d:10.1038_s41467-024-51247-3
    DOI: 10.1038/s41467-024-51247-3
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    References listed on IDEAS

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    1. Shantonu Biswas & Andreas Schoeberl & Yufei Hao & Johannes Reiprich & Thomas Stauden & Joerg Pezoldt & Heiko O. Jacobs, 2019. "Integrated multilayer stretchable printed circuit boards paving the way for deformable active matrix," Nature Communications, Nature, vol. 10(1), pages 1-8, December.
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