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Printable elastic conductors by in situ formation of silver nanoparticles from silver flakes
Nature Materials ( IF 41.2 ) Pub Date : 2017-05-15 00:00:00 , DOI: 10.1038/nmat4904
Naoji Matsuhisa , Daishi Inoue , Peter Zalar , Hanbit Jin , Yorishige Matsuba , Akira Itoh , Tomoyuki Yokota , Daisuke Hashizume , Takao Someya

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 4,000Scm−1 (highest value: 6,168Scm−1) at 0% strain, and 935Scm−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%.

中文翻译:

通过从银片原位形成纳米银颗粒可印刷的弹性导体

可印刷的弹性导体有望为医疗保健,可穿戴设备和机器人技术提供大面积可拉伸的传感器/执行器网络。具有金属纳米颗粒的弹性体是获得高性能的最佳方法之一,但是大面积利用受到其加工性困难的限制。在这里,我们报告了一种可印刷的弹性导体,其包含仅通过混合微米级的Ag薄片,氟橡胶和表面活性剂就地形成的Ag纳米颗粒。我们的可印刷弹性复合材料在0%应变下的电导率高于4,000 S cm -1(最高值:6,168 S cm -1),而在935 S cm -1下拉伸到400%时。Ag纳米颗粒的形成受表面活性剂,加热过程和弹性体分子量的影响,导致电导率的显着提高。演示了用于可伸展机器人的全印刷传感器网络,即使被拉伸超过250%,也可以准确地感测压力和温度。
更新日期:2017-08-12
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