Benefiting from the development of nanomaterials synthesis technology, the performance of many electronic devices, including humidity sensors, has been improved greatly. However, the synthesis of nanomaterials usually involves complex processes, expensive raw materials and even toxic reagents. Herein, the natural nanomaterials of halloysite nanotubes (HNTs) are deliberately selected for the fabrication of high-performance humidity sensor. Characterization results show that the HNTs have good hydrophilicity, hollow tubular nanostructure and large specific surface area, which contribute to humidity sensing performance of the humidity sensor. Further, the humidity sensor based on HNTs is fabricated and its humidity sensing properties are tested at the room temperature (25 °C). The results show that the impedance variation of the HNTs humidity sensor is five orders of magnitude within the humidity range from 0% to 91.5% relative humidity (RH) at the optimum working frequency (100 Hz), and its response time is only about 0.7 s. Notably, the HNTs humidity sensor exhibits wide humidity detection range of 0–91.5% RH, very low RH (7.2%) response characteristic and good linear responses at 0–28.8% and 28.8–91.5% RH. This work provides a simple, low-cost and environmental-friendly strategy for fabricating high-performance humidity sensor by exploring the natural nanomaterials like HNTs.

得益于纳米材料合成技术的发展，包括湿度传感器在内的许多电子设备的性能得到了极大的提高。但是，纳米材料的合成通常涉及复杂的过程，昂贵的原料甚至有毒试剂。在此，特意选择埃洛石纳米管（HNT）的天然纳米材料来制造高性能湿度传感器。表征结果表明，HNT具有良好的亲水性，中空的管状纳米结构和大的比表面积，这有助于湿度传感器的湿度传感性能。此外，制造了基于HNT的湿度传感器，并在室温（25°C）下测试了其湿度感应特性。结果表明，在最佳工作频率（100 Hz）下，HNTs湿度传感器的阻抗变化在相对湿度（RH）为0％至91.5％的湿度范围内为五个数量级，其响应时间仅为0.7左右。 s。值得注意的是，HNTs湿度传感器具有0-91.5％RH的较宽湿度检测范围，非常低的RH（7.2％）响应特性和0-28.8％和28.8-91.5％RH的良好线性响应。这项工作通过探索天然纳米材料（例如HNT），为制造高性能湿度传感器提供了一种简单，低成本且环境友好的策略。HNTs湿度传感器具有0-91.5％RH的宽湿度检测范围，非常低的RH（7.2％）响应特性，以及在0-28.8％和28.8-91.5％RH时具有良好的线性响应。这项工作通过探索天然纳米材料（例如HNT），为制造高性能湿度传感器提供了一种简单，低成本且环境友好的策略。HNTs湿度传感器具有0-91.5％RH的宽湿度检测范围，非常低的RH（7.2％）响应特性，以及在0-28.8％和28.8-91.5％RH时具有良好的线性响应。这项工作通过探索天然纳米材料（例如HNT），为制造高性能湿度传感器提供了一种简单，低成本且环境友好的策略。