The development of innovative devices that enables real-time monitoring of physiological activities and environmental conditions for healthcare applications has gained momentum in recent years. However, it is still a challenge to fabricate a self-sustainable wearable device with inherent comfort, long-time wearing and electrostatic discharge (EDS) safety for the monitoring of human-status. Herein, we developed a self-powered humidity sensor using an electrospun anisotropic triboelectric nanogenerator (A-TENG) composed of aligned MXene nanofibers (NFs) and cellulose acetate (CA) NFs. Importantly, such developed anisotropic structure of TENG exhibits its potential in sensitive moisture detection upon fast adsorption/desorption of water molecules due to increased pore length of prepared NFs. Moreover, it also benefits the device in reducing the EDS risks based on the working orientation of A-TENG. The practical application of detecting the skin moisture using finger-tapping is also demonstrated. Furthermore, CA NFs render superior antibacterial performance due to the high release of loaded copper nanoparticles at targeted skin surfaces, enabling long-time wearability of A-TENG. The above findings suggest that the highly ordered alignment of collected NFs is found to be favorable for the development of future-generation wearable devices.

近年来，能够实时监测医疗保健应用的生理活动和环境条件的创新设备的开发势头强劲。然而，制造一种具有固有舒适性、长时间佩戴和静电放电（EDS）安全性的可自我维持的可穿戴设备以监测人体状态仍然是一个挑战。在此，我们使用由对齐的 MXene 纳米纤维 (NFs) 和醋酸纤维素 (CA) NFs 组成的电纺各向异性摩擦纳米发电机 (A-TENG) 开发了一种自供电湿度传感器。重要的是，由于制备的 NF 的孔长度增加，这种开发的 TENG 各向异性结构在快速吸附/解吸水分子时表现出其在灵敏水分检测中的潜力。而且，基于A-TENG的工作定位，也有利于设备降低EDS风险。还展示了使用手指敲击检测皮肤水分的实际应用。此外，由于负载的铜纳米颗粒在目标皮肤表面的高度释放，CA NFs 具有出色的抗菌性能，从而使 A-TENG 具有长期耐磨性。上述发现表明，收集到的 NF 的高度有序排列被发现有利于下一代可穿戴设备的发展。实现 A-TENG 的长期可穿戴性。上述发现表明，收集到的 NF 的高度有序排列被发现有利于下一代可穿戴设备的发展。实现 A-TENG 的长期可穿戴性。上述发现表明，收集到的 NF 的高度有序排列被发现有利于下一代可穿戴设备的发展。