Graphene/Au Hybrid Antenna Coil Exfoliated with Multi-Stacked Graphene Flakes for Ultra-Thin Biomedical Devices

Yuma Tetsu, Yusuke Kido, Meiting Hao, Shinji Takeoka, Takeshi Maruyama, Toshinori Fujie

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Flexible electronics with organic substrates have been developed for bio-conformable devices and soft robotics. Although biodegradable polymers are preferred substrates for biomedical applications, they have poor heat durability, which precludes printing of conductive lines that require annealing at high temperatures (>250 °C). The fabrication of an ultra-flexible, inkjet-printed antenna coil with a resistivity of 4.30 × 10−5 Ω-cm is reported. It involves annealing of a graphene/Au antenna coil printed on a glass substrate and transferring onto a 182-nm-thick poly(D, L-lactic acid) nanosheet by exfoliation of multi-stacked graphene flakes. Then, a light-emitting device, powered wirelessly, even in the rounded, twisted, or attached states, is fabricated by mounting a blue LED chip on the nanosheet antenna coil. The self-deploying device is also stored in a water-soluble capsule, injected into a silicone bag, released from the dissolved capsule, and operated wirelessly. This work facilitates the hybridization of conductive lines and biodegradable polymers on ultra-flexible biomaterials for the biomedical application of flexible electronics.

Original languageEnglish
Article number1901143
JournalAdvanced Electronic Materials
Volume6
Issue number2
DOIs
Publication statusPublished - 2020 Feb 1

Keywords

  • antennae
  • graphene flakes
  • inkjet printing
  • polymer nanosheets
  • wireless power

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials

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