Printable elastic conductors by in situ formation of silver nanoparticles from silver flakes

Naoji Matsuhisa, Daishi Inoue, Peter Zalar, Hanbit Jin, Yorishige Matsuba, Akira Itoh, Tomoyuki Yokota, Daisuke Hashizume, Takao Someya

Research output: Contribution to journalArticle

225 Citations (Scopus)

Abstract

Printable elastic conductors promise large-area stretchable sensor/actuator networks for healthcare, wearables and robotics. Elastomers with metal nanoparticles are one of the best approaches to achieve high performance, but large-area utilization is limited by difficulties in their processability. Here we report a printable elastic conductor containing Ag nanoparticles that are formed in situ, solely by mixing micrometre-sized Ag flakes, fluorine rubbers, and surfactant. Our printable elastic composites exhibit conductivity higher than 4,000 S cm-1 (highest value: 6,168 S cm-1) at 0% strain, and 935 S cm-1 when stretched up to 400%. Ag nanoparticle formation is influenced by the surfactant, heating processes, and elastomer molecular weight, resulting in a drastic improvement of conductivity. Fully printed sensor networks for stretchable robots are demonstrated, sensing pressure and temperature accurately, even when stretched over 250%.

Original languageEnglish
Pages (from-to)834-840
Number of pages7
JournalNature Materials
Volume16
Issue number8
DOIs
Publication statusPublished - 2017 Aug 1
Externally publishedYes

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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  • Cite this

    Matsuhisa, N., Inoue, D., Zalar, P., Jin, H., Matsuba, Y., Itoh, A., Yokota, T., Hashizume, D., & Someya, T. (2017). Printable elastic conductors by in situ formation of silver nanoparticles from silver flakes. Nature Materials, 16(8), 834-840. https://doi.org/10.1038/nmat4904