Humidity sensors are vital for ambient monitoring, but existing sensors focus on moisture absorption, overlooking the indispensable role of ion channels in the water-electricity conversion process. Here, an ultra-miniaturized fiber humidity (MFH) sensor based on near-parallel ion pathways is presented. The well-designed nanochannels significantly facilitate ion transport due to the stable charge distribution and the confined ions migration within near-parallel nanostructure, which improves the water-electricity conversion efficiency of moisture-sensitive fibers. Optimized nanochannels enable the MFH sensor to improve the response/recovery speed by ≈5 times compared to the disordered nanochannels. Additionally, the MFH sensor can be woven for ultra-miniaturization (0.50 mm²), which is much smaller than current sensors. Therefore, the integrated MFH sensor array demonstrated exceptionally high spatial resolution (sensor density of 1 mm⁻¹), highlighting its potential in flexible wearables. This work provides new optimization strategies and assembly means for designing the high-performance humidity sensors of the next generation.

中文翻译：

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基于近平行离子路径的超小型化光纤湿度传感器诱导高效的水电转换


湿度传感器对于环境监测至关重要，但现有的传感器专注于水分吸收，而忽视了离子通道在水电转换过程中不可或缺的作用。本文介绍了一种基于近平行离子路径的超小型化纤维湿度 （MFH） 传感器。由于稳定的电荷分布和近平行纳米结构内的受限离子迁移，设计良好的纳米通道显着促进了离子传输，从而提高了湿敏性纤维的水电转换效率。优化的纳米通道使 MFH 传感器能够将响应/恢复速度提高 ≈5 倍。此外，MFH 传感器可以编织以实现超小型化 （0.50 mm²），这比电流传感器小得多。因此，集成的 MFH 传感器阵列表现出极高的空间分辨率（传感器密度为 1 mm⁻¹），凸显了其在柔性可穿戴设备中的潜力。这项工作为设计下一代高性能湿度传感器提供了新的优化策略和组装方法。