1. An Ultrastretchable and Self-Healable Nanocomposite Conductor Enabled by Autonomously Percolative Electrical Pathways
- Author
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Jaeyoung Hong, Duhwan Seong, Jinseok Kim, Sun Hong Kim, Jaewan Mun, Jaemin Kim, Jiheong Kang, Yu Chan Kim, Inchan Youn, Dong Hee Son, Changhee Lee, Jeffrey B.-H. Tok, Zhenan Bao, Hyunseon Seo, Han-Jin Kim, and Hyun-Kwang Seok
- Subjects
chemistry.chemical_classification ,Materials science ,Nanocomposite ,Scanning electron microscope ,General Engineering ,General Physics and Astronomy ,02 engineering and technology ,Polymer ,Conductivity ,010402 general chemistry ,021001 nanoscience & nanotechnology ,01 natural sciences ,Silver nanoparticle ,0104 chemical sciences ,Conductor ,Strain energy ,chemistry ,General Materials Science ,Composite material ,0210 nano-technology ,Electrical conductor - Abstract
Both self-healable conductors and stretchable conductors have been previously reported. However, it is still difficult to simultaneously achieve high stretchability, high conductivity, and self-healability. Here, we observed an intriguing phenomenon, termed “electrical self-boosting”, which enables reconstructing of electrically percolative pathways in an ultrastretchable and self-healable nanocomposite conductor (over 1700% strain). The autonomously reconstructed percolative pathways were directly verified by using microcomputed tomography and in situ scanning electron microscopy. The encapsulated nanocomposite conductor shows exceptional conductivity (average value: 2578 S cm–1; highest value: 3086 S cm–1) at 3500% tensile strain by virtue of efficient strain energy dissipation of the self-healing polymer and self-alignment and rearrangement of silver flakes surrounded by spontaneously formed silver nanoparticles and their self-assembly in the strained self-healing polymer matrix. In addition, the condu...
- Published
- 2019