Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Nanjing Forestry University, Nanjing 210037, China.
ACS Nano. 2024 Oct 22;18(42):28834-28848. doi: 10.1021/acsnano.4c08617. Epub 2024 Oct 10.
Integrating self-healing capabilities into epidermal electrodes is crucial to improving their reliability and longevity. Self-healing nanofibrous materials are considered an ideal candidate for constructing ultrathin, long-lasting wearable epidermal electrodes due to their lightweight and high breathability. However, due to the strong interaction between fibers, self-healing nanofiber membranes cannot exist stably. Therefore, the development of self-healing and breathable nanofibrous epidermal electrodes still remains a major challenge. Here, a hierarchical confinement strategy that combines molecular and spatial confinement to overcome supramolecular hydrogen bonding between self-healing nanofibers is reported, and an ultrathin self-healing nanofibrous epidermal electrode with a neural net-like structure is developed. It can achieve real-time monitoring of electrophysiological signals through long-term conformal attachment to skin or plants and has no adverse effects on skin health or plant growth. Given the almost imperceptible nature of epidermal electrodes to users and plants, it lays the foundation for the development of biocompatible, self-healing, wearable, flexible electronics.
将自修复功能集成到表皮电极中对于提高其可靠性和寿命至关重要。自修复纳米纤维材料由于其重量轻和高透气性，被认为是构建超薄、持久的可穿戴表皮电极的理想候选材料。然而，由于纤维之间的强相互作用，自修复纳米纤维膜不能稳定存在。因此，开发自修复和透气的纳米纤维表皮电极仍然是一个主要挑战。在这里，报道了一种层次限制策略，该策略结合了分子和空间限制来克服自修复纳米纤维之间的超分子氢键，开发出了具有神经网结构的超薄自修复纳米纤维表皮电极。它可以通过长期贴合皮肤或植物来实现对电生理信号的实时监测，并且对皮肤健康或植物生长没有不良影响。鉴于表皮电极对用户和植物几乎是不可察觉的，它为开发生物兼容、自修复、可穿戴、灵活的电子产品奠定了基础。
