Kim, Sun Hong Seo, Hyunseon Kang, Jiheoug Hong, Jaeyoung Seong, Duhwan Kim, Han-Jin Kim, Jaemin Mun, Jaewan Youn, Inchan Kim, Jinseok Kim, Yu-Chan Seok, Hyun-Kwang Lee, Changhee Tok, Jeffrey B. -H. Bao, Zhenan Son, Donghee 2024-01-19T20:02:09Z 2024-01-19T20:02:09Z 2021-09-02 2019-06 1936-0851 https://pubs.kist.re.kr/handle/201004/119965 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 nano composite conductor (over 1700% strain). The autonomously reconstructed percolative pathways were directly verified by using micro computed 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 conductor maintains high conductivity and stretchability even after recovered from a complete cut. Besides, a design of double-layered conductor enabled by the self-bonding assembly allowed a conducting interface to be located on the neutral mechanical plane, showing extremely durable operations in a cyclic stretching test. Finally, we successfully demonstrated that electromyogram signals can be monitored by our self healable interconnects. Such information was transmitted to a prosthetic robot to control various hand motions for robust interactive human-robot interfaces. English AMER CHEMICAL SOC SILVER NANOPARTICLES POLYMER LIGHTWEIGHT An Ultrastretchable and Self-Healable Nanocomposite Conductor Enabled by Autonomously Percolative Electrical Pathways Article 10.1021/acsnano.9b00160 1 ACS NANO, v.13, no.6, pp.6531 - 6539 ACS NANO 13 6 6531 6539 scie scopus 000473248300039 2-s2.0-85066895528 Chemistry, Multidisciplinary Chemistry, Physical Nanoscience & Nanotechnology Materials Science, Multidisciplinary Chemistry Science & Technology - Other Topics Materials Science Article SILVER NANOPARTICLES POLYMER LIGHTWEIGHT nanocomposite conductor electrical self-boosting self-healability ultrastretchability human-robot interfaces