基于原位焦耳热处理的自黏附柔性表面肌电电极阵列设计与制备

With the development of flexible electronics, epidermal electronics have played an increasingly prominent role in human–computer interaction. However, the stability and reliability of flexible devices remain a challenge for their widespread applications. In this paper, a surface electromyography (sEMG) electrode array is designed with polyvinyl alcohol as the substrate and gold (Au) as the electrode layer. The active area is accurately treated by in-situ Joule heating to improve the crystallinity and modulus to enhance the electrode stability. The sEMG electrode array can conformally attach to the skin, and an sEMG signal with high signal-to-noise (~21.3 dB) can be recorded for over 8 hours. Further research on the application of gesture recognition based on the sEMG signal was conducted, and the recognition rate reached 99.27%. The above results show that the preparation method of the sEMG electrode array proposed in this study is simple and efficient, can work stably for a long time, and can be applied in the field of human–computer interaction based on sEMG signals.