近日，香港城市大学的Xinge Yu及其研究团队取得一项新进展。经过不懈努力，他们研制出一种用于软集成可渗透电子器件的三维液体二极管。相关研究成果已于2024年3月27日在国际权威学术期刊《自然》上发表。

该研究团队提出一种基于三维液体二极管(3DLD)结构的集成透湿可穿戴电子产品的一般策略。通过构建空间非均质润湿性，3DLD以11.6mlcm^-2min^-1的最大流量将汗液单向自泵至出口，比运动时的生理排汗速率高4000倍，即使在出汗的情况下也能表现出卓越的亲肤性、用户舒适性和稳定的信号读取行为。

可拆卸设计包含可更换的蒸汽/排汗基底，可重复使用软电路/电子设备，提高其可持续性和成本效益。研究人员在先进的皮肤集成电子产品和纺织品集成电子产品中展示了这一基础技术，突出了其在可扩展、用户友好的可穿戴设备方面的潜力。

据悉，具有良好透气性的可穿戴电子设备使佩戴体验舒适，并便于长时间连续监测生物信号。然而，目前对渗透电子学的研究主要处于电极和衬底开发阶段，远远落后于与各种电子元件(如电路、电子、封装)全面集成的实际应用。在一个单一的、集成的可穿戴电子系统中实现渗透性和多功能性，仍然是一个艰巨的挑战。

附：英文原文

Title: A three-dimensional liquid diode for soft, integrated permeable electronics

Author: Zhang, Binbin, Li, Jiyu, Zhou, Jingkun, Chow, Lung, Zhao, Guangyao, Huang, Ya, Ma, Zhiqiang, Zhang, Qiang, Yang, Yawen, Yiu, Chun Ki, Li, Jian, Chun, Fengjun, Huang, Xingcan, Gao, Yuyu, Wu, Pengcheng, Jia, Shengxin, Li, Hu, Li, Dengfeng, Liu, Yiming, Yao, Kuanming, Shi, Rui, Chen, Zhenlin, Khoo, Bee Luan, Yang, Weiqing, Wang, Feng, Zheng, Zijian, Wang, Zuankai, Yu, Xinge

Issue&Volume: 2024-03-27

Abstract: Wearable electronics with great breathability enable a comfortable wearing experience and facilitate continuous biosignal monitoring over extended periods. However, current research on permeable electronics is predominantly at the stage of electrode and substrate development, which is far behind practical applications with comprehensive integration with diverse electronic components (for example, circuitry, electronics, encapsulation). Achieving permeability and multifunctionality in a singular, integrated wearable electronic system remains a formidable challenge. Here we present a general strategy for integrated moisture-permeable wearable electronics based on three-dimensional liquid diode (3DLD) configurations. By constructing spatially heterogeneous wettability, the 3DLD unidirectionally self-pumps the sweat from the skin to the outlet at a maximum flow rate of 11.6mlcm^-2min^-1, 4,000 times greater than the physiological sweat rate during exercise, presenting exceptional skin-friendliness, user comfort and stable signal-reading behaviour even under sweating conditions. A detachable design incorporating a replaceable vapour/sweat-discharging substrate enables the reuse of soft circuitry/electronics, increasing its sustainability and cost-effectiveness. We demonstrated this fundamental technology in both advanced skin-integrated electronics and textile-integrated electronics, highlighting its potential for scalable, user-friendly wearable devices.

DOI: 10.1038/s41586-024-07161-1

Source: https://www.nature.com/articles/s41586-024-07161-1