期刊
NATURE MATERIALS
卷 16, 期 8, 页码 834-840出版社
NATURE PUBLISHING GROUP
DOI: 10.1038/NMAT4904
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资金
- JST ERATO Bio-Harmonized Electronics Project
- Advanced Leading Graduate Course for Photon Science (ALPS)
- Japan Society for the Promotion of Science (JSPS)
- Graduate Program for Leaders in Life Innovation (GPLLI)
- Grants-in-Aid for Scientific Research [16J06866] Funding Source: KAKEN
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 diffculties 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%.
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