Tang Lixue, Cheng Shiyu, Zhang Luyao, Mi Hanbing, Mou Lei, Yang Shuaijian, Huang Zhiwei, Shi Xinghua, Jiang Xingyu
Beijing Engineering Research Center for BioNanotechnology and CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, CAS Center for Excellence in Nanoscience, National Center for NanoScience and Technology, No. 11 Zhongguancun Beiyitiao, Beijing 100190, P. R. China; University of Chinese Academy of Sciences, 19 A Yuquan Road, Shijingshan District, Beijing 100049, P. R. China.
Beijing Engineering Research Center for BioNanotechnology and CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, CAS Center for Excellence in Nanoscience, National Center for NanoScience and Technology, No. 11 Zhongguancun Beiyitiao, Beijing 100190, P. R. China; University of Chinese Academy of Sciences, 19 A Yuquan Road, Shijingshan District, Beijing 100049, P. R. China; State Key Laboratory of Nonlinear Mechanics, Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190, P. R. China.
iScience. 2018 Jun 29;4:302-311. doi: 10.1016/j.isci.2018.05.013. Epub 2018 Jun 14.
Stretchable, biocompatible devices can bridge electronics and biology. However, most stretchable conductors for such devices are toxic, costly, and regularly break/degrade after several large deformations. Here we show printable, highly stretchable, and biocompatible metal-polymer conductors by casting and peeling off polymers from patterned liquid metal particles, forming surface-embedded metal in polymeric hosts. Our printable conductors present good stretchability (2,316 S/cm at a strain of 500%) and repeatability (ΔR/R <3% after 10,000 cycles), which can satisfy most electrical applications in extreme deformations. This strategy not only overcomes large surface tension of liquid metal but also avoids the undesirable sintering of its particles by stress in deformations, such that stretchable conductors can form on various substrates with high resolution (15 μm), high throughput (∼2,000 samples/hour), and low cost (one-quarter price of silver). We use these conductors for stretchable circuits, motion sensors, wearable glove keyboards, and electroporation of live cells.
可拉伸的生物相容性设备能够架起电子学与生物学之间的桥梁。然而，用于此类设备的大多数可拉伸导体有毒、成本高，并且在经历几次大变形后会经常断裂/降解。在此，我们通过从图案化的液态金属颗粒上浇铸并剥离聚合物，在聚合物主体中形成表面嵌入金属，展示了可印刷、高可拉伸且生物相容的金属-聚合物导体。我们的可印刷导体具有良好的拉伸性（在500%应变下为2316 S/cm）和可重复性（10000次循环后ΔR/R <3%），这能够满足极端变形下的大多数电气应用。这种策略不仅克服了液态金属的大表面张力，还避免了其颗粒在变形过程中因应力而产生的不良烧结现象，从而使得可拉伸导体能够在各种基板上以高分辨率（15μm）、高通量（约2000个样品/小时）和低成本（银价格的四分之一）形成。我们将这些导体用于可拉伸电路、运动传感器、可穿戴手套键盘以及活细胞的电穿孔。
