Li Xiang, Zhang Junyi, Shi Bo, Li Yawen, Wang Yanan, Shuai Kexiang, Li Yue, Ming Gege, Song Tao, Pei Weihua, Sun Baoquan
Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, Suzhou, Jiangsu 215123, P. R. China.
School of Advanced Technology, Xi'an Jiaotong-Liverpool University, Suzhou, Jiangsu 215123, P. R. China.
ACS Appl Mater Interfaces. 2025 Apr 16;17(15):22337-22351. doi: 10.1021/acsami.5c00565. Epub 2025 Apr 6.
The electronic tattoo (e-tattoo), a cutting-edge wearable sensor technology adhered to human skin, has garnered significant attention for its potential in brain-computer interfaces (BCIs) and routine health monitoring. Conventionally, flexible substrates with adhesion force on dewy surfaces pursue seamless contact with skin, employing compact airtight substrates, hindering air circulation between skin and the surrounding environment, and compromising long-term wearing comfort. To address these challenges, we have developed a freestanding transparent e-tattoo featuring flexible serpentine mesh bridges with a unique full-breathable multilayer structure. The mesh e-tattoo demonstrates remarkable ductility and air permeability while maintaining robust electronic properties, even after significant mechanical deformation. Furthermore, it exhibits an impressive visible-light transmittance of up to 95%, coupled with a low sheet resistance of 0.268 Ω sq, ensuring both optical clarity and electrical efficiency. By increasing the number of menisci between the mesh e-tattoo and the skin, the total adhesion force increases due to the cumulative capillary-driven effect. We also successfully demonstrated high-quality bioelectric signal collections. In particular, the controlling virtual reality (VR) objects using electrooculogram (EOG) signals collected by mesh e-tattoos were achieved to demonstrate their potential for human-computer interactions (HCIs). This freestanding transparent e-tattoo with a fully breathable mesh structure represents a significant advancement in flexible electrodes for bioelectrical signal monitoring applications.
电子纹身（e纹身）是一种附着在人体皮肤上的前沿可穿戴传感器技术，因其在脑机接口（BCI）和日常健康监测方面的潜力而备受关注。传统上，在潮湿表面具有粘附力的柔性基板追求与皮肤无缝接触，采用紧凑的气密基板，这阻碍了皮肤与周围环境之间的空气流通，并影响了长期佩戴的舒适度。为应对这些挑战，我们开发了一种独立式透明电子纹身，其具有带独特全透气多层结构的柔性蛇形网状桥。这种网状电子纹身即使在经历显著机械变形后，仍能展现出卓越的延展性和透气性，同时保持稳健的电子性能。此外，它具有高达95%的令人印象深刻的可见光透射率，以及0.268Ω/sq的低薄层电阻，确保了光学清晰度和电效率。通过增加网状电子纹身与皮肤之间的弯月面数量，由于累积的毛细驱动效应，总粘附力会增加。我们还成功展示了高质量的生物电信号采集。特别是，利用网状电子纹身收集的眼电图（EOG）信号控制虚拟现实（VR）对象得以实现，以证明其在人机交互（HCI）方面的潜力。这种具有全透气网状结构的独立式透明电子纹身在用于生物电信号监测应用的柔性电极方面代表了一项重大进展。
