TY - JOUR
T1 - Graphene/Au Hybrid Antenna Coil Exfoliated with Multi-Stacked Graphene Flakes for Ultra-Thin Biomedical Devices
AU - Tetsu, Yuma
AU - Kido, Yusuke
AU - Hao, Meiting
AU - Takeoka, Shinji
AU - Maruyama, Takeshi
AU - Fujie, Toshinori
N1 - Funding Information:
This work was supported by the Precursory Research for Embryonic Science and Technology (PRESTO) from the Japan Science and Technology Agency (JST; grant number JPMJPR152A and PJ75160006), and JSPS KAKENHI (grant number 17K20116, 18H03539, 18H05469), the Noguchi Institute, the Tanaka Memorial Foundation, and the Terumo Foundation for Life Sciences and Arts. T.F. was supported by the Leading Initiative for Excellent Young Researchers (LEADER) by MEXT, Japan. Y.T. was financially supported by the Yoshida Scholarship Foundation.
Publisher Copyright:
© 2019 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
PY - 2020/2/1
Y1 - 2020/2/1
N2 - 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.
AB - 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.
KW - antennae
KW - graphene flakes
KW - inkjet printing
KW - polymer nanosheets
KW - wireless power
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U2 - 10.1002/aelm.201901143
DO - 10.1002/aelm.201901143
M3 - Article
AN - SCOPUS:85076886026
SN - 2199-160X
VL - 6
JO - Advanced Electronic Materials
JF - Advanced Electronic Materials
IS - 2
M1 - 1901143
ER -