Bang Junsung, Ahn Junhyuk, Zhang Jinyuan, Ko Tae Hee, Park Byeonghak, Lee Yong Min, Jung Byung Ku, Lee Sang Yeop, Ok Jehyung, Kim Bong Hoon, Kim Tae-Il, Choi Jong-Il, Lee Chi Hwan, Oh Soong Ju
Department of Materials Science and Engineering, Korea University, Seoul 02841, Republic of Korea.
Weldon School of Biomedical Engineering, Purdue University, West Lafayette, Indiana 47907, United States.
ACS Nano. 2022 Aug 23;16(8):12134-12144. doi: 10.1021/acsnano.2c02664. Epub 2022 Aug 4.
Stretchable electrodes are widely used in next-generation wearable electronics. Recent studies incorporated designs that help rigid electrodes attain stretchability. However, these structures exhibited unsatisfactory charge/signal extraction efficiency because of their low areal fill factor. Additionally, they cannot be photolithographically patterned on polymer substrates because of their low adhesion, requiring additional complicated fabrication steps. We developed photolithographically patternable stretchable electrodes with complete coverage and enhanced charge-extraction efficiency. The electrodes, comprising double layers, included a chemically treated Ag nanowire mesh and Au thin film. The interfacial linker role of polyvinylpyrrolidone chemically strengthened the interfacial bonds, and the reinforced concrete structure of nanowire-embedded metal thin films enhanced the mechanical properties. Therefore, the electrodes provided superior efficiency and stability in capturing physical, electromagnetic, and electrophysiological signals while exceeding the existing stretchable electrode limits. A broad range of applications are foreseen, such as electrocardiogram sensing electrodes, strain sensors, temperature sensors, and antennas.
可拉伸电极在下一代可穿戴电子产品中得到广泛应用。最近的研究纳入了一些设计，以帮助刚性电极实现可拉伸性。然而，由于这些结构的面填充因子较低，其电荷/信号提取效率并不理想。此外，由于它们的附着力较低，无法在聚合物基板上进行光刻图案化，需要额外的复杂制造步骤。我们开发了具有完全覆盖和增强电荷提取效率的可光刻图案化的可拉伸电极。这些电极由双层组成，包括化学处理的银纳米线网格和金薄膜。聚乙烯吡咯烷酮的界面连接作用化学增强了界面键，而纳米线嵌入金属薄膜的钢筋混凝土结构增强了机械性能。因此，这些电极在捕获物理、电磁和电生理信号方面提供了卓越的效率和稳定性，同时超越了现有的可拉伸电极极限。预计其应用范围广泛，如心电图传感电极、应变传感器、温度传感器和天线。
