Wang Youhua, Yin Lang, Bai Yunzhao, Liu Siyi, Wang Liu, Zhou Ying, Hou Chao, Yang Zhaoyu, Wu Hao, Ma Jiaji, Shen Yaoxin, Deng Pengfei, Zhang Shuchang, Duan Tangjian, Li Zehan, Ren Junhui, Xiao Lin, Yin Zhouping, Lu Nanshu, Huang YongAn
State Key Laboratory of Digital Manufacturing Equipment and Technology, Huazhong University of Science and Technology, Wuhan 430074, China.
Flexible Electronics Research Center, Huazhong University of Science and Technology, Wuhan 430074, China.
Sci Adv. 2020 Oct 23;6(43). doi: 10.1126/sciadv.abd0996. Print 2020 Oct.
Epidermal electrophysiology is widely carried out for disease diagnosis, performance monitoring, human-machine interaction, etc. Compared with thick, stiff, and irritating gel electrodes, emerging tattoo-like epidermal electrodes offer much better wearability and versatility. However, state-of-the-art tattoo-like electrodes are limited in size (e.g., centimeters) to perform electrophysiology at scale due to challenges including large-area fabrication, skin lamination, and electrical interference from long interconnects. Therefore, we report large-area, soft, breathable, substrate- and encapsulation-free electrodes designed into transformable filamentary serpentines that can be rapidly fabricated by cut-and-paste method. We propose a Cartan curve-inspired transfer process to minimize strain in the electrodes when laminated on nondevelopable skin surfaces. Unwanted signals picked up by the unencapsulated interconnects can be eliminated through a previously unexplored electrical compensation strategy. These tattoo-like electrodes can comfortably cover the whole chest, forearm, or neck for applications such as multichannel electrocardiography, sign language recognition, prosthetic control or mapping of neck activities.
表皮电生理学广泛应用于疾病诊断、性能监测、人机交互等领域。与厚重、坚硬且具有刺激性的凝胶电极相比，新兴的纹身样表皮电极具有更好的可穿戴性和多功能性。然而，由于包括大面积制造、皮肤层压以及长互连带来的电气干扰等挑战，目前最先进的纹身样电极在尺寸上（例如厘米级）受限，无法大规模进行电生理学研究。因此，我们报告了一种大面积、柔软、透气、无基底和封装的电极，其设计为可变形的丝状蛇形结构，可通过剪切粘贴法快速制造。我们提出了一种受嘉当曲线启发的转移工艺，以在将电极层压到不可展皮肤表面时最小化电极中的应变。未封装的互连所拾取的不需要的信号可以通过一种前所未有的电补偿策略消除。这些纹身样电极可以舒适地覆盖整个胸部、前臂或颈部，用于多通道心电图、手语识别、假肢控制或颈部活动映射等应用。
