Bioresorbable Conductive Wire with Minimal Metal Content

Aleksi Hänninen, Timo Salpavaara, Inari Lyyra, Mart Kroon, Jukka Lekkala, Minna Kellomäki

    Research output: Contribution to journalArticleScientificpeer-review

    5 Citations (Scopus)

    Abstract

    The emergence of transient electronics has created the need for bioresorbable conductive wires for signal and energy transfer. We present a fully bioresorbable wire design where the conductivity is provided by only a few micrometers thick electron-beam evaporated magnesium layer on the surface of a polymer fiber. The structure is electrically insulated with an extrusion coated polymer sheath, which simultaneously serves as a water barrier for the dissolvable magnesium conductor. The resistance of the wires was approximately 1 Ω cm–1 and their functional lifetime in buffer solution was more than 1 week. These properties could be modified by using different conductor materials and film thicknesses. Furthermore, the flexibility of the wires enabled the fabrication of planar radio frequency (RF) coils, which were wirelessly measured. Such coils have the potential to be used as wireless sensors. The wire design provides a basis for bioresorbable wires in applications where only a minimal amount of metal is desired, for example, to avoid toxicity.
    Original languageEnglish
    Pages (from-to)1134-1140
    JournalACS Biomaterials Science & Engineering
    Volume5
    Issue number2
    DOIs
    Publication statusPublished - 18 Dec 2018
    Publication typeA1 Journal article-refereed

    Publication forum classification

    • Publication forum level 1

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