Universal assembly of liquid metal particles in polymers enables elastic printed circuit board

作者：Wonbeom Lee, Hyunjun Kim, In-Ho Kang, Hongjun Park, Jiyoung Jung, Haeseung Lee, Hyunchang Park, Ji Su Park, Jong Min Yuk, Seunghwa Ryu, Jae‐Woong Jeong, Jiheong Kang · 发表于：Science · 年份：2022 · DOI：10.1126/science.abo6631 · 被引用次数：427 · 研究领域：Advanced Sensor and Energy Harvesting Materials、Dielectric materials and actuators、Electrospun Nanofibers in Biomedical Applications

An elastic printed circuit board (E-PCB) is a conductive framework used for the facile assembly of system-level stretchable electronics. E-PCBs require elastic conductors that have high conductivity, high stretchability, tough adhesion to various components, and imperceptible resistance changes even under large strain. We present a liquid metal particle network (LMP Net ) assembled by applying an acoustic field to a solid-state insulating liquid metal particle composite as the elastic conductor. The LMP Net conductor satisfies all the aforementioned requirements and enables the fabrication of a multilayered high-density E-PCB, in which numerous electronic components are intimately integrated to create highly stretchable skin electronics. Furthermore, we could generate the LMP Net in various polymer matrices, including hydrogels, self-healing elastomers, and photoresists, thus showing their potential for use in soft electronics.